Central Colorado Assessment Project (CCAP): Geochemical Data for Rock, Sediment, Soil and Concentrate Sample Media

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Title:
Central Colorado Assessment Project (CCAP): Geochemical Data for Rock, Sediment, Soil and Concentrate Sample Media
Abstract:
The Microsoft Access database serves as a geochemical data warehouse in support of the Central Colorado Assessment Project (CCAP), and contains data tables describing quantitative and qualitative geochemical analyses determined by 70 analytical laboratory and field methods for 47,478 rock, sediment, soil, and heavy-mineral concentrate samples, most of which were collected by USGS personnel and analyzed either in the analytical laboratories of the Geologic Discipline of the USGS or by contract with commercial analytical laboratories. These data represent analyses of samples collected in support of various USGS programs. In addition, geochemical data from 7,470 sediment and soil samples collected and analyzed under the Atomic Energy Commission (AEC) National Uranium Resource Evaluation (NURE) Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) Program (henceforth called NURE) has been included in this database. In addition to data from 2,377 samples collected and analyzed under CCAP, this data set includes archived geochemical data originally entered into the in-house Rock Analysis Storage System (RASS) database (used by the Geologic Discipline from the mid-1960's through the late-1980's) and the in-house PLUTO database (used by the Geologic Discipline from the mid-1970's through the mid-1990's). All of these data are maintained in the Oracle-based National Geochemical Database (NGDB). Retrievals from the NGDB and from the NURE database were used to generate most of this data set. In addition, USGS data that have previously been excluded from the NGDB because it predates earliest USGS geochemical databases or was once excluded for programmatic reasons have been included in the CCAP Geochemical Database and will be added to the NGDB.
Supplemental_Information: Tabular datafiles included in this dataset are: CCAP.mdb
  1. How should this data set be cited?

    U.S. Geological Survey (USGS), 2010, Central Colorado Assessment Project (CCAP): Geochemical Data for Rock, Sediment, Soil and Concentrate Sample Media: U.S. Geological Survey Data Series XXX, U.S. Geological Survey, Denver, CO.

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  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -106.625
    East_Bounding_Coordinate: -104.75
    North_Bounding_Coordinate: 41.125
    South_Bounding_Coordinate: 36.875

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 1908
    Ending_Date: 2007
    Currentness_Reference: sample collection and analysis period

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: tabular data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a point data set. It contains the following vector data types (SDTS terminology):

      • point (47478)

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.0002. Longitudes are given to the nearest 0.0002. Latitude and longitude values are specified in decimal degrees.

  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview:
    The AnalyticMethod table is a table of analytic methods used to obtain chemical and physical data.

    FIELD_NAME FIELD_TYPE FIELD_SIZE FIELD_DESC ANALYTIC_METHOD Text 50 Unique short name of analytic method. ANALYTIC_METHOD_DESC Text 255 Full description of analytic method. DIGESTION_METHOD Text 25 Digestion method used in analytic method. ANALYTIC_METHOD_PUB_ID Text 125 Unique ID for analytic method publication; usually USGS Library call number for reference of analytic method.

    Entity_and_Attribute_Detail_Citation:
    database designer/metadata author Matthew Granitto; see Data_Quality_Information/Lineage/Process_Step/Process_Contact/Contact_Information.
    Entity_and_Attribute_Overview:
    The AnalyticMethodBiblio table is a table of references for analytic methods used to obtain chemical data.

    FIELD_NAME FIELD_TYPE FIELD_SIZE FIELD_DESC ANALYTIC_METHOD_PUB_ID Text 125 Unique ID for analytic method publication; usually USGS Library call number for reference of analytic method. PUB_AUTHOR Text 255 Publication author(s). PUB_YEAR Number Integer Year of publication. PUB_TITLE Text 255 Title of publication. PUB_SERIES_TITLE Text 150 Series title of publication. PUB_PAGES Text 100 Pages in publication. PUB_URL Hyperlink n/a URL of publication, if available. PUB_NOTES Memo n/a Notes regarding publication. PUB_ORG_LINK Text 50 Organization linked to publication.

    Entity_and_Attribute_Detail_Citation:
    database designer/metadata author Matthew Granitto; see Data_Quality_Information/Lineage/Process_Step/Process_Contact/Contact_Information.
    Entity_and_Attribute_Overview:
    The Chem_Data table is a table of all chemical data.

    FIELD_NAME FIELD_TYPE FIELD_SIZE FIELD_DESC CHEM_ID Number Long Integer Unique quantitative value identifier. JOB_ID Number Double Laboratory batch identifier assigned by the Sample Control Officer of the analytical laboratory that received the samples as a batch. LAB_ID Number Double Unique identifier assigned to each submitted sample by the Sample Control Officer of the analytical laboratory that received the sample. PARAMETER Text 35 Chemical parameter that is a concatenation of SPECIES, UNITS, TECHNIQUE, and DIGESTION. SPECIES Text 35 Chemical attribute that has a data value associated with it. QUALIFIED_VALUE Number Double Numeric result; qualified so that DATA_VALUEs with associated QUALIFIERs '<', 'N' or 'L' are expressed as negative values, and DATA_VALUEs with associated QUALIFIERs '>' or 'G' end in "999". DATA_VALUE Number Double Numeric result. QUALIFIER Text 1 Qualifying modifer for result; i.e., '<', '>'. UNITS Text 15 Units of concentration or measurement in which the DATA_VALUE is expressed. TECHNIQUE Text 15 Abbreviation of analytic method used to analyze the sample. DIGESTION Text 1 Abbreviation of degree of sample digestion â total or partial â required by TECHNIQUE used to analyze the sample for a specific species. DECOMPOSITION Text 50 Brief description of decomposition method used for given TECHNIQUE in the analysis of the sample, or a comment that further describes this TECHNIQUE. LAB_NAME Text 50 Abbreviated name of agency or organization that performed chemical analysis.

    Entity_and_Attribute_Detail_Citation:
    database designer/metadata author Matthew Granitto; see Data_Quality_Information/Lineage/Process_Step/Process_Contact/Contact_Information.
    Entity_and_Attribute_Overview:
    The table Chem_HMC is a table of chemical data for heavy mineral concentrate samples.

    FIELD_NAME FIELD_TYPE FIELD_SIZE FIELD_DESC LAB_ID Number Double Unique identifier assigned to each submitted sample by the Sample Control Officer of the analytical laboratory that received the sample. FIELD_ID Number Double Field identifier assigned by the sample collector of sample submitted for analysis, possibly corrected by data renovator due to truncation of data entry. JOB_ID Number Double Laboratory batch identifier assigned by the Sample Control Officer of the analytical laboratory that received the samples as a batch. LATITUDE Number Decimal Latitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 LONGITUDE Number Decimal Longitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 Ag_ppm_AES Number Double Silver, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ag_ppm_ES Number Double Silver, in parts per million, by direct-current arc emission spectrography. Al_pct_AES Number Double Aluminum, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Al_pct_ES Number Double Aluminum, in weight percent, by direct-current arc emission spectrography. As_ppm_AA Number Double Arsenic, in parts per million, by atomic absorption spectrophotometry. As_ppm_AA/P Number Double Arsenic, in parts per million, by atomic absorption spectrophotometry after partial digestion. As_ppm_AES Number Double Arsenic, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. As_ppm_CM/P Number Double Arsenic, parts per million, by colorimetry after partial digestion. As_ppm_ES Number Double Arsenic, in parts per million, by direct-current arc emission spectrography. Au_ppm_AA Number Double Gold, in parts per million, by atomic absorption spectrophotometry. Au_ppm_AES Number Double Gold, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Au_ppm_ES Number Double Gold, in parts per million, by direct-current arc emission spectrography. B_ppm_ES Number Double Boron, in parts per million, by direct-current arc emission spectrography. Ba_ppm_AES Number Double Barium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ba_ppm_ES Number Double Barium, in parts per million, by direct-current arc emission spectrography. Be_ppm_AES Number Double Beryllium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Be_ppm_ES Number Double Beryllium, in parts per million, by direct-current arc emission spectrography. Bi_ppm_AA/P Number Double Bismuth, in parts per million, by atomic absorption spectrophotometry after partial digestion. Bi_ppm_AES Number Double Bismuth, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Bi_ppm_ES Number Double Bismuth, in parts per million, by direct-current arc emission spectrography. Ca_pct_AES Number Double Calcium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Ca_pct_ES Number Double Calcium, in weight percent, by direct-current arc emission spectrography. Cd_ppm_AA/P Number Double Cadmium, in parts per million, by atomic absorption spectrophotometry after partial digestion. Cd_ppm_AES Number Double Cadmium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Cd_ppm_ES Number Double Cadmium, in parts per million, by direct-current arc emission spectrography. Ce_ppm_AES Number Double Cerium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Co_ppm_AES Number Double Cobalt, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Co_ppm_ES Number Double Cobalt, in parts per million, by direct-current arc emission spectrography. Cr_ppm_AES Number Double Chromium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Cr_ppm_ES Number Double Chromium, in parts per million, by direct-current arc emission spectrography. Cu_ppm_AA/P Number Double Copper, in parts per million, by atomic absorption spectrophotometry after partial digestion. Cu_ppm_AES Number Double Copper, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Cu_ppm_CM/P Number Double Copper, parts per million, by colorimetry after partial digestion. Cu_ppm_ES Number Double Copper, in parts per million, by direct-current arc emission spectrography. Eu_ppm_AES Number Double Europium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Eu_ppm_ES Number Double Europium, in parts per million, by direct-current arc emission spectrography. Fe_pct_AES Number Double Iron, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Fe_pct_ES Number Double Iron, in weight percent, by direct-current arc emission spectrography. Ga_ppm_AES Number Double Gallium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ga_ppm_ES Number Double Gallium, in parts per million, by direct-current arc emission spectrography. Ge_ppm_ES Number Double Germanium, in parts per million, by direct-current arc emission spectrography. Hf_ppm_ES Number Double Hafnium, in parts per million, by direct-current arc emission spectrography. HM_ppm_CM/P Number Double Heavy metals, parts per million, by colorimetry after partial digestion. Ho_ppm_AES Number Double Holmium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. In_ppm_ES Number Double Indium, in parts per million, by direct-current arc emission spectrography. K_pct_AES Number Double Potassium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. K_pct_ES Number Double Potassium, in weight percent, by direct-current arc emission spectrography. La_ppm_AES Number Double Lanthanum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. La_ppm_ES Number Double Lanthanum, in parts per million, by direct-current arc emission spectrography. Li_ppm_AES Number Double Lithium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Li_ppm_ES Number Double Lithium, in parts per million, by direct-current arc emission spectrography. Mg_pct_AES Number Double Magnesium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Mg_pct_ES Number Double Magnesium, in weight percent, by direct-current arc emission spectrography. Mn_pct_AES Number Double Manganese, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Mn_pct_ES Number Double Manganese, in weight percent, by direct-current arc emission spectrography. Mo_ppm_AES Number Double Molybdenum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Mo_ppm_ES Number Double Molybdenum, in parts per million, by direct-current arc emission spectrography. Na_pct_AES Number Double Sodium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Na_pct_ES Number Double Sodium, in weight percent, by direct-current arc emission spectrography. Nb_ppm_AES Number Double Niobium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Nb_ppm_ES Number Double Niobium, in parts per million, by direct-current arc emission spectrography. Nd_ppm_AES Number Double Neodymium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ni_ppm_AES Number Double Nickel, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ni_ppm_ES Number Double Nickel, in parts per million, by direct-current arc emission spectrography. P_pct_AES Number Double Phosphorus, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. P_pct_ES Number Double Phosphorus, in weight percent, by direct-current arc emission spectrography. Pb_ppm_AES Number Double Lead, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Pb_ppm_ES Number Double Lead, in parts per million, by direct-current arc emission spectrography. Pd_ppm_ES Number Double Palladium, in parts per million, by direct-current arc emission spectrography. Pd_ppm_FA Number Double Palladium, in parts per million, by fire assay. Pt_ppm_ES Number Double Platinum, in parts per million, by direct-current arc emission spectrography. Pt_ppm_FA Number Double Platinum, in parts per million, by fire assay. Re_ppm_ES Number Double Rhenium, in parts per million, by direct-current arc emission spectrography. Rh_ppm_FA Number Double Rhodium, in parts per million, by fire assay. Sb_ppm_AA/P Number Double Antimony, in parts per million, by atomic absorption spectrophotometry after partial digestion. Sb_ppm_ES Number Double Antimony, in parts per million, by direct-current arc emission spectrography. Sc_ppm_AES Number Double Scandium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Sc_ppm_ES Number Double Scandium, in parts per million, by direct-current arc emission spectrography. Se_ppm_AA Number Double Selenium, in parts per million, by atomic absorption spectrophotometry. Sn_ppm_AES Number Double Tin, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Sn_ppm_ES Number Double Tin, in parts per million, by direct-current arc emission spectrography. SplWt-Au_g_GV Number Double Sample weight, for gold analysis, in grams, by gravimetry. Sr_ppm_AES Number Double Strontium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Sr_ppm_ES Number Double Strontium, in parts per million, by direct-current arc emission spectrography. Ta_ppm_AES Number Double Tantalum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ta_ppm_ES Number Double Tantalum, in parts per million, by direct-current arc emission spectrography. Te_ppm_AA Number Double Tellurium, in parts per million, by atomic absorption spectrophotometry. Te_ppm_ES Number Double Tellurium, in parts per million, by direct-current arc emission spectrography. Th_ppm_AES Number Double Thorium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Th_ppm_ES Number Double Thorium, in parts per million, by direct-current arc emission spectrography. Ti_pct_AES Number Double Titanium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Ti_pct_ES Number Double Titanium, in weight percent, by direct-current arc emission spectrography. Tl_ppm_AA Number Double Thallium, in parts per million, by atomic absorption spectrophotometry. Tl_ppm_ES Number Double Thallium, in parts per million, by direct-current arc emission spectrography. U_ppm_AES Number Double Uranium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. U_ppm_ES Number Double Uranium, in parts per million, by direct-current arc emission spectrography. U_ppm_FL Number Double Uranium, in parts per million, by fluorometry. U-eq_ppm_GRC Number Double Uranium, equvalent, in parts per million, by gamma ray count. V_ppm_AES Number Double Vanadium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. V_ppm_ES Number Double Vanadium, in parts per million, by direct-current arc emission spectrography. W_ppm_ES Number Double Tungsten, in parts per million, by direct-current arc emission spectrography. Y_ppm_AES Number Double Yttrium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Y_ppm_ES Number Double Yttrium, in parts per million, by direct-current arc emission spectrography. Yb_ppm_AES Number Double Ytterbium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Zn_ppm_AA/P Number Double Zinc, in parts per million, by atomic absorption spectrophotometry after partial digestion. Zn_ppm_AES Number Double Zinc, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Zn_ppm_ES Number Double Zinc, in parts per million, by direct-current arc emission spectrography. Zr_ppm_ES Number Double Zirconium, in parts per million, by direct-current arc emission spectrography.

    Entity_and_Attribute_Detail_Citation:
    database designer/metadata author Matthew Granitto; see Data_Quality_Information/Lineage/Process_Step/Process_Contact/Contact_Information.
    Entity_and_Attribute_Overview:
    The table Chem_Rx_Majors is a able of chemical "whole rock" data for rock samples.

    FIELD_NAME FIELD_TYPE FIELD_SIZE FIELD_DESC LAB_ID Number Double Unique identifier assigned to each submitted sample by the Sample Control Officer of the analytical laboratory that received the sample. FIELD_ID Number Double Field identifier assigned by the sample collector of sample submitted for analysis, possibly corrected by data renovator due to truncation of data entry. JOB_ID Number Double Laboratory batch identifier assigned by the Sample Control Officer of the analytical laboratory that received the samples as a batch. LATITUDE Number Decimal Latitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 LONGITUDE Number Decimal Longitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 Al2O3_pct_AES Number Double Aluminum, as aluminum trioxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Al2O3_pct_CM Number Double Aluminum, as aluminum trioxide, in weight percent, by colorimetry. Al2O3_pct_ES Number Double Aluminum, as aluminum trioxide, in weight percent, by direct-current arc emission spectrography. Al2O3_pct_GV Number Double Aluminum, as aluminum trioxide, in weight percent, by gravimetry. Al2O3_pct_MS Number Double Aluminum, as aluminum trioxide, in weight percent, by inductively coupled plasma-mass spectroscopy. Al2O3_pct_XRF Number Double Aluminum, as aluminum trioxide, in weight percent, by X-ray fluorescence spectroscopy. Ash_pct_CB Number Double Ash, in weight percent, by combustion. C_pct_CB Number Double Total carbon, in weight percent, by combustion. CaO_pct_AA Number Double Calcium, as calcium oxide, in weight percent, by atomic absorption spectrophotometry. CaO_pct_AES Number Double Calcium, as calcium oxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. CaO_pct_CM Number Double Calcium, as calcium oxide, in weight percent, by colorimetry. CaO_pct_ES Number Double Calcium, as calcium oxide, in weight percent, by direct-current arc emission spectrography. CaO_pct_GV Number Double Calcium, as calcium oxide, in weight percent, by gravimetry. CaO_pct_MS Number Double Calcium, as calcium oxide, in weight percent, by inductively coupled plasma-mass spectroscopy. CaO_pct_NA Number Double Calcium, as calcium oxide, in weight percent, by neutron activation. CaO_pct_XRF Number Double Calcium, as calcium oxide, in weight percent, by X-ray fluorescence spectroscopy. C-CO3_pct_CP Number Double Carbonate carbon, in weight percent, by computation. C-CO3_pct_TT Number Double Carbonate carbon, in weight percent, by titration. C-CO3_pct_VOL Number Double Carbonate carbon, in weight percent, by a volumetric method. Cl_pct_CM Number Double Chlorine, in weight percent, by colorimetry. Cl_pct_GV Number Double Chlorine, in weight percent, by gravimetry. Cl_pct_ISE Number Double Chlorine, in weight percent, by ion specific electrode. Cl_pct_XRF Number Double Chlorine, in weight percent, by X-ray fluorescence spectroscopy. CO2_pct_GV Number Double Carbon dioxide, in weight percent, by gravimetry. CO2_pct_TT Number Double Carbon dioxide, in weight percent, by titration. CO2_pct_VOL Number Double Carbon dioxide, in weight percent, by a volumetric method. C-org_pct_CB Number Double Organic carbon, in weight percent, by combustion. C-org_pct_CP Number Double Organic carbon, in weight percent, by computation. Dens-B_g/cc_GV Number Double Bulk density, in grams per cubic centimeter, by gravimetry. Dens-P_g/cc_GV Number Double Powder density, in grams per cubic centimeter, by gravimetry. F_pct_CM Number Double Fluorine, in weight percent, by colorimetry. F_pct_GV Number Double Fluorine, in weight percent, by gravimetry. F_pct_ISE Number Double Fluorine, in weight percent, by ion specific electrode. Fe2O3_pct_AES Number Double Iron, as iron trioxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Fe2O3_pct_CM Number Double Iron, as iron trioxide, in weight percent, by colorimetry. Fe2O3_pct_GV Number Double Iron, as iron trioxide, in weight percent, by gravimetry. Fe2O3_pct_TT Number Double Iron, as iron trioxide, in weight percent, by titration. Fe2O3_pct_XRF Number Double Iron, as iron trioxide, in weight percent, by X-ray fluorescence spectroscopy. FeO_pct_GV Number Double Ferrous oxide, in weight percent, by gravimetry. FeO_pct_TT Number Double Ferrous oxide, in weight percent, by titration. FeTO3_pct_AA Number Double Iron, as total iron oxide, in weight percent, by atomic absorption spectrophotometry. FeTO3_pct_AES Number Double Iron, as total iron oxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. FeTO3_pct_CM Number Double Iron, as total iron oxide, in weight percent, by colorimetry. FeTO3_pct_ES Number Double Iron, as total iron oxide, in weight percent, by direct-current arc emission spectrography. FeTO3_pct_MS Number Double Iron, as total iron oxide, in weight percent, by inductively coupled plasma-mass spectroscopy. FeTO3_pct_NA Number Double Iron, as total iron oxide, in weight percent, by neutron activation. FeTO3_pct_XRF Number Double Iron, as total iron oxide, in weight percent, by X-ray fluorescence spectroscopy. FeTO3-CV_pct_NA Number Double Iron, as total iron oxide, coefficient of variance, in weight percent, by neutron activation. H2O_pct_GV Number Double Total water, in weight percent, by gravimetry. H2O-_pct_GV Number Double Moisture, in weight percent, by gravimetry. H2O_pct_TT Number Double Total water, in weight percent, by titration. H2O+_pct_GV Number Double Bound water, in weight percent, by gravimetry. H2O+_pct_TT Number Double Bound water, in weight percent, by titration. K2O_pct_AA Number Double Potassium, as potassium oxide, in weight percent, by atomic absorption spectrophotometry. K2O_pct_AES Number Double Potassium, as potassium oxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. K2O_pct_CM Number Double Potassium, as potassium oxide, in weight percent, by colorimetry. K2O_pct_ES Number Double Potassium, as potassium oxide, in weight percent, by direct-current arc emission spectrography. K2O_pct_GV Number Double Potassium, as potassium oxide, in weight percent, by gravimetry. K2O_pct_MS Number Double Potassium, as potassium oxide, in weight percent, by inductively coupled plasma-mass spectroscopy. K2O_pct_NA Number Double Potassium, as potassium oxide, in weight percent, by neutron activation. K2O_pct_XRF Number Double Potassium, as potassium oxide, in weight percent, by X-ray fluorescence spectroscopy. K2O-CV_pct_NA Number Double Potassium, as potassium oxide, coefficient of variance, in weight percent, by neutron activation. Less-O_pct_GV Number Double Oxygen correction, in weight percent, by gravimetry. LOI_pct_CB Number Double Loss on ignition, in weight percent, by combustion. MgO_pct_AA Number Double Magnesium, as magnesium oxide, in weight percent, by atomic absorption spectrophotometry. MgO_pct_AES Number Double Magnesium, as magnesium oxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. MgO_pct_CM Number Double Magnesium, as magnesium oxide, in weight percent, by colorimetry. MgO_pct_ES Number Double Magnesium, as magnesium oxide, in weight percent, by direct-current arc emission spectrography. MgO_pct_GV Number Double Magnesium, as magnesium oxide, in weight percent, by gravimetry. MgO_pct_MS Number Double Magnesium, as magnesium oxide, in weight percent, by inductively coupled plasma-mass spectroscopy. MgO_pct_XRF Number Double Magnesium, as magnesium oxide, in weight percent, by X-ray fluorescence spectroscopy. MnO_pct_AA Number Double Manganese, as manganese oxide, in weight percent, by atomic absorption spectrophotometry. MnO_pct_AES Number Double Manganese, as manganese oxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. MnO_pct_CM Number Double Manganese, as manganese oxide, in weight percent, by colorimetry. MnO_pct_ES Number Double Manganese, as manganese oxide, in weight percent, by direct-current arc emission spectrography. MnO_pct_GV Number Double Manganese, as manganese oxide, in weight percent, by gravimetry. MnO_pct_MS Number Double Manganese, as manganese oxide, in weight percent, by inductively coupled plasma-mass spectroscopy. MnO_pct_NA Number Double Manganese, as manganese oxide, in weight percent, by neutron activation. MnO_pct_XRF Number Double Manganese, as manganese oxide, in weight percent, by X-ray fluorescence spectroscopy. MnO-CV_pct_NA Number Double Manganese, as manganese oxide, coefficient of variance, in weight percent, by neutron activation. Na2O_pct_AA Number Double Sodium, as sodium dioxide, in weight percent, by atomic absorption spectrophotometry. Na2O_pct_AES Number Double Sodium, as sodium dioxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Na2O_pct_CM Number Double Sodium, as sodium dioxide, in weight percent, by colorimetry. Na2O_pct_ES Number Double Sodium, as sodium dioxide, in weight percent, by direct-current arc emission spectrography. Na2O_pct_GV Number Double Sodium, as sodium dioxide, in weight percent, by gravimetry. Na2O_pct_MS Number Double Sodium, as sodium dioxide, in weight percent, by inductively coupled plasma-mass spectroscopy. Na2O_pct_NA Number Double Sodium, as sodium dioxide, in weight percent, by neutron activation. Na2O_pct_XRF Number Double Sodium, as sodium dioxide, in weight percent, by X-ray fluorescence spectroscopy. Na2O-CV_pct_NA Number Double Sodium, as sodium dioxide, coefficient of variance, in weight percent, by neutron activation. P2O5_pct_AES Number Double Phosphorus, as phosphorus pentoxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. P2O5_pct_CM Number Double Phosphorus, as phosphorus pentoxide, in weight percent, by colorimetry. P2O5_pct_ES Number Double Phosphorus, as phosphorus pentoxide, in weight percent, by direct-current arc emission spectrography. P2O5_pct_GV Number Double Phosphorus, as phosphorus pentoxide, in weight percent, by gravimetry. P2O5_pct_MS Number Double Phosphorus, as phosphorus pentoxide, in weight percent, by inductively coupled plasma-mass spectroscopy. P2O5_pct_XRF Number Double Phosphorus, as phosphorus pentoxide, in weight percent, by X-ray fluorescence spectroscopy. S_pct_AES Number Double Total sulfur, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. S_pct_CB Number Double Total sulfur, in weight percent, by combustion. S_pct_CM Number Double Total sulfur, in weight percent, by colorimetry. S_pct_GV Number Double Total sulfur, in weight percent, by gravimetry. S_pct_TB Number Double Total sulfur, in weight percent, by turbidimetry. S_pct_XRF Number Double Total sulfur, in weight percent, by X-ray fluorescence spectroscopy. SiO2_pct_AES Number Double Silicon, as silicon dioxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. SiO2_pct_CM Number Double Silicon, as silicon dioxide, in weight percent, by colorimetry. SiO2_pct_ES Number Double Silicon, as silicon dioxide, in weight percent, by direct-current arc emission spectrography. SiO2_pct_GV Number Double Silicon, as silicon dioxide, in weight percent, by gravimetry. SiO2_pct_XRF Number Double Silicon, as silicon dioxide, in weight percent, by X-ray fluorescence spectroscopy. SO3_pct_CM Number Double Acid-soluble sulfate, in weight percent, by colorimetry. SO3_pct_GV Number Double Acid-soluble sulfate, in weight percent, by gravimetry. Sulfide_pct_CM Number Double Sulfide, in weight percent, by colorimetry. Sulfide_pct_TB Number Double Sulfide, in weight percent, by turbidimetry. TiO2_pct_AES Number Double Titanium, as titanium dioxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. TiO2_pct_CM Number Double Titanium, as titanium dioxide, in weight percent, by colorimetry. TiO2_pct_ES Number Double Titanium, as titanium dioxide, in weight percent, by direct-current arc emission spectrography. TiO2_pct_GV Number Double Titanium, as titanium dioxide, in weight percent, by gravimetry. TiO2_pct_MS Number Double Titanium, as titanium dioxide, in weight percent, by inductively coupled plasma-mass spectroscopy. TiO2_pct_XRF Number Double Titanium, as titanium dioxide, in weight percent, by X-ray fluorescence spectroscopy. Total_pct_CP Number Double Total, calculated, in weight percent, by computation.

    Entity_and_Attribute_Detail_Citation:
    database designer/metadata author Matthew Granitto; see Data_Quality_Information/Lineage/Process_Step/Process_Contact/Contact_Information.
    Entity_and_Attribute_Overview:
    The table Chem_Rx_Traces_Ag-Gd is a table of trace element data - silver through gadolinium - for rock samples.

    FIELD_NAME FIELD_TYPE FIELD_SIZE FIELD_DESC LAB_ID Number Double Unique identifier assigned to each submitted sample by the Sample Control Officer of the analytical laboratory that received the sample. FIELD_ID Number Double Field identifier assigned by the sample collector of sample submitted for analysis, possibly corrected by data renovator due to truncation of data entry. JOB_ID Number Double Laboratory batch identifier assigned by the Sample Control Officer of the analytical laboratory that received the samples as a batch. LATITUDE Number Decimal Latitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 LONGITUDE Number Decimal Longitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 Ag_ppm_AA Number Double Silver, in parts per million, by atomic absorption spectrophotometry. Ag_ppm_AA/P Number Double Silver, in parts per million, by atomic absorption spectrophotometry after partial digestion. Ag_ppm_AES Number Double Silver, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ag_ppm_AES/P Number Double Silver, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Ag_ppm_ES Number Double Silver, in parts per million, by direct-current arc emission spectrography. Ag_ppm_FA Number Double Silver, in parts per million, by fire assay. Ag_ppm_MS Number Double Silver, in parts per million, by inductively coupled plasma-mass spectroscopy. Ag_ppm_XRF Number Double Silver, in parts per million, by X-ray fluorescence spectroscopy. Al_ppm_AES/P Number Double Aluminum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. As_ppm_AA Number Double Arsenic, in parts per million, by atomic absorption spectrophotometry. As_ppm_AA/P Number Double Arsenic, in parts per million, by atomic absorption spectrophotometry after partial digestion. As_ppm_AES Number Double Arsenic, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. As_ppm_AES/P Number Double Arsenic, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. As_ppm_CM Number Double Arsenic, parts per million, by colorimetry. As_ppm_CM/P Number Double Arsenic, parts per million, by colorimetry after partial digestion. As_ppm_ES Number Double Arsenic, in parts per million, by direct-current arc emission spectrography. As_ppm_MS Number Double Arsenic, in parts per million, by inductively coupled plasma-mass spectroscopy. As_ppm_NA Number Double Arsenic, in parts per million, by neutron activation. As_ppm_XRF Number Double Arsenic, in parts per million, by X-ray fluorescence spectroscopy. As-CV_pct_NA Number Double Arsenic, coefficient of variance, in weight percent, by neutron activation. Au_ppm_AA Number Double Gold, in parts per million, by atomic absorption spectrophotometry. Au_ppm_AES Number Double Gold, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Au_ppm_AES/P Number Double Gold, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Au_ppm_ES Number Double Gold, in parts per million, by direct-current arc emission spectrography. Au_ppm_FA Number Double Gold, in parts per million, by fire assay. Au_ppm_MS Number Double Gold, in parts per million, by inductively coupled plasma-mass spectroscopy. Au_ppm_NA Number Double Gold, in parts per million, by neutron activation. Au-CV_pct_NA Number Double Gold, coefficient of variance, in weight percent, by neutron activation. B_ppm_ES Number Double Boron, in parts per million, by direct-current arc emission spectrography. Ba_ppm_AA Number Double Barium, in parts per million, by atomic absorption spectrophotometry. Ba_ppm_AES Number Double Barium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ba_ppm_AES/P Number Double Barium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Ba_ppm_ES Number Double Barium, in parts per million, by direct-current arc emission spectrography. Ba_ppm_GV Number Double Barium, in parts per million, by gravimetry. Ba_ppm_MS Number Double Barium, in parts per million, by inductively coupled plasma-mass spectroscopy. Ba_ppm_NA Number Double Barium, in parts per million, by neutron activation. Ba_ppm_XRF Number Double Barium, in parts per million, by X-ray fluorescence spectroscopy. Ba-CV_pct_NA Number Double Barium, coefficient of variance, in weight percent, by neutron activation. Be_ppm_AES Number Double Beryllium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Be_ppm_AES/P Number Double Beryllium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Be_ppm_ES Number Double Beryllium, in parts per million, by direct-current arc emission spectrography. Be_ppm_FL Number Double Beryllium, in parts per million, by fluorometry. Be_ppm_MS Number Double Beryllium, in parts per million, by inductively coupled plasma-mass spectroscopy. Bi_ppm_AA Number Double Bismuth, in parts per million, by atomic absorption spectrophotometry. Bi_ppm_AA/P Number Double Bismuth, in parts per million, by atomic absorption spectrophotometry after partial digestion. Bi_ppm_AES Number Double Bismuth, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Bi_ppm_AES/P Number Double Bismuth, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Bi_ppm_ES Number Double Bismuth, in parts per million, by direct-current arc emission spectrography. Bi_ppm_MS Number Double Bismuth, in parts per million, by inductively coupled plasma-mass spectroscopy. Bi_ppm_XRF Number Double Bismuth, in parts per million, by X-ray fluorescence spectroscopy. Br_ppm_XRF Number Double Bromine, in parts per million, by X-ray fluorescence spectroscopy. Ca_ppm_AES/P Number Double Calcium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Cd_ppm_AA Number Double Cadmium, in parts per million, by atomic absorption spectrophotometry. Cd_ppm_AA/P Number Double Cadmium, in parts per million, by atomic absorption spectrophotometry after partial digestion. Cd_ppm_AES Number Double Cadmium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Cd_ppm_AES/P Number Double Cadmium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Cd_ppm_ES Number Double Cadmium, in parts per million, by direct-current arc emission spectrography. Cd_ppm_MS Number Double Cadmium, in parts per million, by inductively coupled plasma-mass spectroscopy. Cd_ppm_XRF Number Double Cadmium, in parts per million, by X-ray fluorescence spectroscopy. Ce_ppm_AES Number Double Cerium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ce_ppm_AES/P Number Double Cerium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Ce_ppm_ES Number Double Cerium, in parts per million, by direct-current arc emission spectrography. Ce_ppm_MS Number Double Cerium, in parts per million, by inductively coupled plasma-mass spectroscopy. Ce_ppm_NA Number Double Cerium, in parts per million, by neutron activation. Ce_ppm_XRF Number Double Cerium, in parts per million, by X-ray fluorescence spectroscopy. Ce-CV_pct_NA Number Double Cerium, coefficient of variance, in weight percent, by neutron activation. Co_ppm_AA Number Double Cobalt, in parts per million, by atomic absorption spectrophotometry. Co_ppm_AES Number Double Cobalt, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Co_ppm_AES/P Number Double Cobalt, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Co_ppm_ES Number Double Cobalt, in parts per million, by direct-current arc emission spectrography. Co_ppm_MS Number Double Cobalt, in parts per million, by inductively coupled plasma-mass spectroscopy. Co_ppm_NA Number Double Cobalt, in parts per million, by neutron activation. Co-CV_pct_NA Number Double Cobalt, coefficient of variance, in weight percent, by neutron activation. Cr_ppm_AA Number Double Chromium, in parts per million, by atomic absorption spectrophotometry. Cr_ppm_AES Number Double Chromium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Cr_ppm_AES/P Number Double Chromium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Cr_ppm_CM Number Double Chromium, parts per million, by colorimetry. Cr_ppm_ES Number Double Chromium, in parts per million, by direct-current arc emission spectrography. Cr_ppm_GV Number Double Chromium, in parts per million, by gravimetry. Cr_ppm_MS Number Double Chromium, in parts per million, by inductively coupled plasma-mass spectroscopy. Cr_ppm_NA Number Double Chromium, in parts per million, by neutron activation. Cr_ppm_XRF Number Double Chromium, in parts per million, by X-ray fluorescence spectroscopy. Cr-CV_pct_NA Number Double Chromium, coefficient of variance, in weight percent, by neutron activation. Cs_ppm_AA Number Double Cesium, in parts per million, by atomic absorption spectrophotometry. Cs_ppm_ES Number Double Cesium, in parts per million, by direct-current arc emission spectrography. Cs_ppm_MS Number Double Cesium, in parts per million, by inductively coupled plasma-mass spectroscopy. Cs_ppm_NA Number Double Cesium, in parts per million, by neutron activation. Cs_ppm_XRF Number Double Cesium, in parts per million, by X-ray fluorescence spectroscopy. Cs-CV_pct_NA Number Double Cesium, coefficient of variance, in weight percent, by neutron activation. Cu_ppm_AA Number Double Copper, in parts per million, by atomic absorption spectrophotometry. Cu_ppm_AA/P Number Double Copper, in parts per million, by atomic absorption spectrophotometry after partial digestion. Cu_ppm_AES Number Double Copper, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Cu_ppm_AES/P Number Double Copper, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Cu_ppm_CM Number Double Copper, parts per million, by colorimetry. Cu_ppm_ES Number Double Copper, in parts per million, by direct-current arc emission spectrography. Cu_ppm_MS Number Double Copper, in parts per million, by inductively coupled plasma-mass spectroscopy. Cu_ppm_XRF Number Double Copper, in parts per million, by X-ray fluorescence spectroscopy. Dy_ppm_AES Number Double Dysprosium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Dy_ppm_ES Number Double Dysprosium, in parts per million, by direct-current arc emission spectrography. Dy_ppm_MS Number Double Dysprosium, in parts per million, by inductively coupled plasma-mass spectroscopy. Dy_ppm_NA Number Double Dysprosium, in parts per million, by neutron activation. Dy_ppm_XRF Number Double Dysprosium, in parts per million, by X-ray fluorescence spectroscopy. Dy-CV_pct_NA Number Double Dysprosium, coefficient of variance, in weight percent, by neutron activation. Er_ppm_AES Number Double Erbium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Er_ppm_ES Number Double Erbium, in parts per million, by direct-current arc emission spectrography. Er_ppm_MS Number Double Erbium, in parts per million, by inductively coupled plasma-mass spectroscopy. Er_ppm_XRF Number Double Erbium, in parts per million, by X-ray fluorescence spectroscopy. Eu_ppm_AES Number Double Europium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Eu_ppm_ES Number Double Europium, in parts per million, by direct-current arc emission spectrography. Eu_ppm_MS Number Double Europium, in parts per million, by inductively coupled plasma-mass spectroscopy. Eu_ppm_NA Number Double Europium, in parts per million, by neutron activation. Eu_ppm_XRF Number Double Europium, in parts per million, by X-ray fluorescence spectroscopy. Eu-CV_pct_NA Number Double Europium, coefficient of variance, in weight percent, by neutron activation. Fe_ppm_AES/P Number Double Iron, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Ga_ppm_AES Number Double Gallium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ga_ppm_ES Number Double Gallium, in parts per million, by direct-current arc emission spectrography. Ga_ppm_MS Number Double Gallium, in parts per million, by inductively coupled plasma-mass spectroscopy. Ga_ppm_XRF Number Double Gallium, in parts per million, by X-ray fluorescence spectroscopy. Gd_ppm_AES Number Double Gadolinium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Gd_ppm_ES Number Double Gadolinium, in parts per million, by direct-current arc emission spectrography. Gd_ppm_MS Number Double Gadolinium, in parts per million, by inductively coupled plasma-mass spectroscopy. Gd_ppm_NA Number Double Gadolinium, in parts per million, by neutron activation. Gd_ppm_XRF Number Double Gadolinium, in parts per million, by X-ray fluorescence spectroscopy. Gd-CV_pct_NA Number Double Gadolinium, coefficient of variance, in weight percent, by neutron activation.

    Entity_and_Attribute_Detail_Citation:
    database designer/metadata author Matthew Granitto; see Data_Quality_Information/Lineage/Process_Step/Process_Contact/Contact_Information.
    Entity_and_Attribute_Overview:
    The table Chem_Rx_Traces_Ge-Sb is a table of trace element data - germanium through antimony - for rock samples.

    FIELD_NAME FIELD_TYPE FIELD_SIZE FIELD_DESC LAB_ID Number Double Unique identifier assigned to each submitted sample by the Sample Control Officer of the analytical laboratory that received the sample. FIELD_ID Number Double Field identifier assigned by the sample collector of sample submitted for analysis, possibly corrected by data renovator due to truncation of data entry. JOB_ID Number Double Laboratory batch identifier assigned by the Sample Control Officer of the analytical laboratory that received the samples as a batch. LATITUDE Number Decimal Latitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 LONGITUDE Number Decimal Longitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 Ge_ppm_AA Number Double Germanium, in parts per million, by atomic absorption spectrophotometry. Ge_ppm_AES Number Double Germanium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ge_ppm_ES Number Double Germanium, in parts per million, by direct-current arc emission spectrography. Ge_ppm_MS Number Double Germanium, in parts per million, by inductively coupled plasma-mass spectroscopy. Ge_ppm_XRF Number Double Germanium, in parts per million, by X-ray fluorescence spectroscopy. Hf_ppm_ES Number Double Hafnium, in parts per million, by direct-current arc emission spectrography. Hf_ppm_MS Number Double Hafnium, in parts per million, by inductively coupled plasma-mass spectroscopy. Hf_ppm_NA Number Double Hafnium, in parts per million, by neutron activation. Hf-CV_pct_NA Number Double Hafnium, coefficient of variance, in weight percent, by neutron activation. Hg_ppm_AA Number Double Mercury, in parts per million, by atomic absorption spectrophotometry. Hg_ppm_ES Number Double Mercury, in parts per million, by direct-current arc emission spectrography. HM_ppm_CM/P Number Double Heavy metals, parts per million, by colorimetry after partial digestion. Ho_ppm_AES Number Double Holmium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ho_ppm_ES Number Double Holmium, in parts per million, by direct-current arc emission spectrography. Ho_ppm_MS Number Double Holmium, in parts per million, by inductively coupled plasma-mass spectroscopy. Ho_ppm_NA Number Double Holmium, in parts per million, by neutron activation. Ho_ppm_XRF Number Double Holmium, in parts per million, by X-ray fluorescence spectroscopy. Ho-CV_pct_NA Number Double Holmium, coefficient of variance, in weight percent, by neutron activation. I_ppm_ISE Number Double Iodine, in parts per million, by ion specific electrode. I_ppm_XRF Number Double Iodine, in parts per million, by X-ray fluorescence spectroscopy. In_ppm_AA Number Double Indium, in parts per million, by atomic absorption spectrophotometry. In_ppm_ES Number Double Indium, in parts per million, by direct-current arc emission spectrography. In_ppm_MS Number Double Indium, in parts per million, by inductively coupled plasma-mass spectroscopy. Ir_ppm_ES Number Double Iridium, in parts per million, by direct-current arc emission spectrography. Ir_ppm_FA Number Double Iridium, in parts per million, by fire assay. K_ppm_AES/P Number Double Potassium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. La_ppm_AES Number Double Lanthanum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. La_ppm_AES/P Number Double Lanthanum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. La_ppm_ES Number Double Lanthanum, in parts per million, by direct-current arc emission spectrography. La_ppm_MS Number Double Lanthanum, in parts per million, by inductively coupled plasma-mass spectroscopy. La_ppm_NA Number Double Lanthanum, in parts per million, by neutron activation. La_ppm_XRF Number Double Lanthanum, in parts per million, by X-ray fluorescence spectroscopy. La-CV_pct_NA Number Double Lanthanum, coefficient of variance, in weight percent, by neutron activation. Li_ppm_AA Number Double Lithium, in parts per million, by atomic absorption spectrophotometry. Li_ppm_AES Number Double Lithium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Li_ppm_AES/P Number Double Lithium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Li_ppm_CM Number Double Lithium, parts per million, by colorimetry. Li_ppm_ES Number Double Lithium, in parts per million, by direct-current arc emission spectrography. Li_ppm_GV Number Double Lithium, in parts per million, by gravimetry. Li_ppm_MS Number Double Lithium, in parts per million, by inductively coupled plasma-mass spectroscopy. Li_ppm_NA Number Double Lithium, in parts per million, by neutron activation. Lu_ppm_AES Number Double Lutetium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Lu_ppm_ES Number Double Lutetium, in parts per million, by direct-current arc emission spectrography. Lu_ppm_MS Number Double Lutetium, in parts per million, by inductively coupled plasma-mass spectroscopy. Lu_ppm_NA Number Double Lutetium, in parts per million, by neutron activation. Lu_ppm_XRF Number Double Lutetium, in parts per million, by X-ray fluorescence spectroscopy. Lu-CV_pct_NA Number Double Lutetium, coefficient of variance, in weight percent, by neutron activation. Mg_ppm_AES/P Number Double Magnesium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Mn_ppm_AA/P Number Double Manganese, in parts per million, by atomic absorption spectrophotometry after partial digestion. Mn_ppm_AES/P Number Double Manganese, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Mo_ppm_AA Number Double Molybdenum, in parts per million, by atomic absorption spectrophotometry. Mo_ppm_AA/P Number Double Molybdenum, in parts per million, by atomic absorption spectrophotometry after partial digestion. Mo_ppm_AES Number Double Molybdenum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Mo_ppm_AES/P Number Double Molybdenum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Mo_ppm_CM Number Double Molybdenum, parts per million, by colorimetry. Mo_ppm_CM/P Number Double Molybdenum, parts per million, by colorimetry after partial digestion. Mo_ppm_ES Number Double Molybdenum, in parts per million, by direct-current arc emission spectrography. Mo_ppm_GV Number Double Molybdenum, in parts per million, by gravimetry. Mo_ppm_MS Number Double Molybdenum, in parts per million, by inductively coupled plasma-mass spectroscopy. Mo_ppm_XRF Number Double Molybdenum, in parts per million, by X-ray fluorescence spectroscopy. Na_ppm_AES/P Number Double Sodium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Nb_ppm_AES Number Double Niobium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Nb_ppm_ES Number Double Niobium, in parts per million, by direct-current arc emission spectrography. Nb_ppm_MS Number Double Niobium, in parts per million, by inductively coupled plasma-mass spectroscopy. Nb_ppm_XRF Number Double Niobium, in parts per million, by X-ray fluorescence spectroscopy. Nd_ppm_AES Number Double Neodymium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Nd_ppm_ES Number Double Neodymium, in parts per million, by direct-current arc emission spectrography. Nd_ppm_MS Number Double Neodymium, in parts per million, by inductively coupled plasma-mass spectroscopy. Nd_ppm_XRF Number Double Neodymium, in parts per million, by X-ray fluorescence spectroscopy. Nd-CV_pct_NA Number Double Neodymium, coefficient of variance, in weight percent, by neutron activation. Ni_ppm_AA Number Double Nickel, in parts per million, by atomic absorption spectrophotometry. Ni_ppm_AES Number Double Nickel, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ni_ppm_AES/P Number Double Nickel, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Ni_ppm_CM Number Double Nickel, parts per million, by colorimetry. Ni_ppm_ES Number Double Nickel, in parts per million, by direct-current arc emission spectrography. Ni_ppm_MS Number Double Nickel, in parts per million, by inductively coupled plasma-mass spectroscopy. Ni_ppm_NA Number Double Nickel, in parts per million, by neutron activation. Ni_ppm_XRF Number Double Nickel, in parts per million, by X-ray fluorescence spectroscopy. Ni-CV_pct_NA Number Double Nickel, coefficient of variance, in weight percent, by neutron activation. Os_ppm_ES Number Double Osmium, in parts per million, by direct-current arc emission spectrography. Os_ppm_FA Number Double Osmium, in parts per million, by fire assay. P_ppm_AES/P Number Double Phosphorus, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Pb_ppm_AA Number Double Lead, in parts per million, by atomic absorption spectrophotometry. Pb_ppm_AA/P Number Double Lead, in parts per million, by atomic absorption spectrophotometry after partial digestion. Pb_ppm_AES Number Double Lead, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Pb_ppm_AES/P Number Double Lead, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Pb_ppm_CM Number Double Lead, parts per million, by colorimetry. Pb_ppm_ES Number Double Lead, in parts per million, by direct-current arc emission spectrography. Pb_ppm_MS Number Double Lead, in parts per million, by inductively coupled plasma-mass spectroscopy. Pb_ppm_NA Number Double Lead, in parts per million, by neutron activation. Pb_ppm_XRF Number Double Lead, in parts per million, by X-ray fluorescence spectroscopy. Pd_ppm_ES Number Double Palladium, in parts per million, by direct-current arc emission spectrography. Pd_ppm_FA Number Double Palladium, in parts per million, by fire assay. Pr_ppm_AES Number Double Praseodymium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Pr_ppm_ES Number Double Praseodymium, in parts per million, by direct-current arc emission spectrography. Pr_ppm_MS Number Double Praseodymium, in parts per million, by inductively coupled plasma-mass spectroscopy. Pr_ppm_XRF Number Double Praseodymium, in parts per million, by X-ray fluorescence spectroscopy. Pt_ppm_ES Number Double Platinum, in parts per million, by direct-current arc emission spectrography. Pt_ppm_FA Number Double Platinum, in parts per million, by fire assay. Rb_ppm_AA Number Double Rubidium, in parts per million, by atomic absorption spectrophotometry. Rb_ppm_ES Number Double Rubidium, in parts per million, by direct-current arc emission spectrography. Rb_ppm_MS Number Double Rubidium, in parts per million, by inductively coupled plasma-mass spectroscopy. Rb_ppm_NA Number Double Rubidium, in parts per million, by neutron activation. Rb_ppm_XRF Number Double Rubidium, in parts per million, by X-ray fluorescence spectroscopy. Rb-CV_pct_NA Number Double Rubidium, coefficient of variance, in weight percent, by neutron activation. Re_ppm_ES Number Double Rhenium, in parts per million, by direct-current arc emission spectrography. Re_ppm_MS Number Double Rhenium, in parts per million, by inductively coupled plasma-mass spectroscopy. Re_ppm_XRF Number Double Rhenium, in parts per million, by X-ray fluorescence spectroscopy. Rh_ppm_ES Number Double Rhodium, in parts per million, by direct-current arc emission spectrography. Rh_ppm_FA Number Double Rhodium, in parts per million, by fire assay. Ru_ppm_ES Number Double Ruthenium, in parts per million, by direct-current arc emission spectrography. Ru_ppm_FA Number Double Ruthenium, in parts per million, by fire assay. Sb_ppm_AA Number Double Antimony, in parts per million, by atomic absorption spectrophotometry. Sb_ppm_AA/P Number Double Antimony, in parts per million, by atomic absorption spectrophotometry after partial digestion. Sb_ppm_AES/P Number Double Antimony, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Sb_ppm_CM Number Double Antimony, parts per million, by colorimetry. Sb_ppm_CM/P Number Double Antimony, parts per million, by colorimetry after partial digestion. Sb_ppm_ES Number Double Antimony, in parts per million, by direct-current arc emission spectrography. Sb_ppm_MS Number Double Antimony, in parts per million, by inductively coupled plasma-mass spectroscopy. Sb_ppm_NA Number Double Antimony, in parts per million, by neutron activation. Sb_ppm_XRF Number Double Antimony, in parts per million, by X-ray fluorescence spectroscopy. Sb-CV_pct_NA Number Double Antimony, coefficient of variance, in weight percent, by neutron activation.

    Entity_and_Attribute_Detail_Citation:
    database designer/metadata author Matthew Granitto; see Data_Quality_Information/Lineage/Process_Step/Process_Contact/Contact_Information.
    Entity_and_Attribute_Overview:
    The table Chem_Rx_Traces_Sc-Zr is a table of trace element data - scandium through zirconium - for rock samples.

    FIELD_NAME FIELD_TYPE FIELD_SIZE FIELD_DESC LAB_ID Number Double Unique identifier assigned to each submitted sample by the Sample Control Officer of the analytical laboratory that received the sample. FIELD_ID Number Double Field identifier assigned by the sample collector of sample submitted for analysis, possibly corrected by data renovator due to truncation of data entry. JOB_ID Number Double Laboratory batch identifier assigned by the Sample Control Officer of the analytical laboratory that received the samples as a batch. LATITUDE Number Decimal Latitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 LONGITUDE Number Decimal Longitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 Sc_ppm_AES Number Double Scandium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Sc_ppm_ES Number Double Scandium, in parts per million, by direct-current arc emission spectrography. Sc_ppm_MS Number Double Scandium, in parts per million, by inductively coupled plasma-mass spectroscopy. Sc_ppm_NA Number Double Scandium, in parts per million, by neutron activation. Sc_ppm_XRF Number Double Scandium, in parts per million, by X-ray fluorescence spectroscopy. Sc-CV_pct_NA Number Double Scandium, coefficient of variance, in weight percent, by neutron activation. Nd_ppm_NA Number Double Neodymium, in parts per million, by neutron activation. Se_ppm_AA Number Double Selenium, in parts per million, by atomic absorption spectrophotometry. Se_ppm_ES Number Double Selenium, in parts per million, by direct-current arc emission spectrography. Se_ppm_FL Number Double Selenium, in parts per million, by fluorometry. Se_ppm_MS Number Double Selenium, in parts per million, by inductively coupled plasma-mass spectroscopy. Se_ppm_NA Number Double Selenium, in parts per million, by neutron activation. Se_ppm_XRF Number Double Selenium, in parts per million, by X-ray fluorescence spectroscopy. Sm_ppm_AES Number Double Samarium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Sm_ppm_ES Number Double Samarium, in parts per million, by direct-current arc emission spectrography. Sm_ppm_MS Number Double Samarium, in parts per million, by inductively coupled plasma-mass spectroscopy. Sm_ppm_NA Number Double Samarium, in parts per million, by neutron activation. Sm_ppm_XRF Number Double Samarium, in parts per million, by X-ray fluorescence spectroscopy. Sm-CV_pct_NA Number Double Samarium, coefficient of variance, in weight percent, by neutron activation. Sn_ppm_AA Number Double Tin, in parts per million, by atomic absorption spectrophotometry. Sn_ppm_AA/P Number Double Tin, in parts per million, by atomic absorption spectrophotometry after partial digestion. Sn_ppm_AES Number Double Tin, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Sn_ppm_AES/P Number Double Tin, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Sn_ppm_ES Number Double Tin, in parts per million, by direct-current arc emission spectrography. Sn_ppm_FL Number Double Tin, in parts per million, by fluorometry. Sn_ppm_MS Number Double Tin, in parts per million, by inductively coupled plasma-mass spectroscopy. Sn_ppm_XRF Number Double Tin, in parts per million, by X-ray fluorescence spectroscopy. SplWt-Au_g_GV Number Double Sample weight, for gold analysis, in grams, by gravimetry. SplWt-FA_g_GV Number Double Sample weight, for fire assay analysis, in grams, by gravimetry. Sr_ppm_AA Number Double Strontium, in parts per million, by atomic absorption spectrophotometry. Sr_ppm_AES Number Double Strontium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Sr_ppm_AES/P Number Double Strontium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Sr_ppm_CM Number Double Strontium, parts per million, by colorimetry. Sr_ppm_ES Number Double Strontium, in parts per million, by direct-current arc emission spectrography. Sr_ppm_GV Number Double Strontium, in parts per million, by gravimetry. Sr_ppm_MS Number Double Strontium, in parts per million, by inductively coupled plasma-mass spectroscopy. Sr_ppm_NA Number Double Strontium, in parts per million, by neutron activation. Sr_ppm_XRF Number Double Strontium, in parts per million, by X-ray fluorescence spectroscopy. Sr-CV_pct_NA Number Double Strontium, coefficient of variance, in weight percent, by neutron activation. Ta_ppm_AES Number Double Tantalum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ta_ppm_ES Number Double Tantalum, in parts per million, by direct-current arc emission spectrography. Ta_ppm_MS Number Double Tantalum, in parts per million, by inductively coupled plasma-mass spectroscopy. Ta_ppm_NA Number Double Tantalum, in parts per million, by neutron activation. Ta-CV_pct_NA Number Double Tantalum, coefficient of variance, in weight percent, by neutron activation. Tb_ppm_AES Number Double Terbium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Tb_ppm_ES Number Double Terbium, in parts per million, by direct-current arc emission spectrography. Tb_ppm_MS Number Double Terbium, in parts per million, by inductively coupled plasma-mass spectroscopy. Tb_ppm_NA Number Double Terbium, in parts per million, by neutron activation. Tb_ppm_XRF Number Double Terbium, in parts per million, by X-ray fluorescence spectroscopy. Tb-CV_pct_NA Number Double Terbium, coefficient of variance, in weight percent, by neutron activation. Te_ppm_AA Number Double Tellurium, in parts per million, by atomic absorption spectrophotometry. Te_ppm_CM Number Double Tellurium, parts per million, by colorimetry. Te_ppm_ES Number Double Tellurium, in parts per million, by direct-current arc emission spectrography. Te_ppm_MS Number Double Tellurium, in parts per million, by inductively coupled plasma-mass spectroscopy. Th_ppm_AES Number Double Thorium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Th_ppm_AES/P Number Double Thorium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Th_ppm_CM Number Double Thorium, parts per million, by colorimetry. Th_ppm_ES Number Double Thorium, in parts per million, by direct-current arc emission spectrography. Th_ppm_MS Number Double Thorium, in parts per million, by inductively coupled plasma-mass spectroscopy. Th_ppm_NA Number Double Thorium, in parts per million, by neutron activation. Th_ppm_TB Number Double Thorium, in parts per million by turbidimetry. Th_ppm_XRF Number Double Thorium, in parts per million, by X-ray fluorescence spectroscopy. Th-CV_pct_NA Number Double Thorium, coefficient of variance, in weight percent, by neutron activation. Ti_ppm_AES/P Number Double Titanium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Tl_ppm_AA Number Double Thallium, in parts per million, by atomic absorption spectrophotometry. Tl_ppm_ES Number Double Thallium, in parts per million, by direct-current arc emission spectrography. Tl_ppm_MS Number Double Thallium, in parts per million, by inductively coupled plasma-mass spectroscopy. Tm_ppm_AES Number Double Thulium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Tm_ppm_ES Number Double Thulium, in parts per million, by direct-current arc emission spectrography. Tm_ppm_MS Number Double Thulium, in parts per million, by inductively coupled plasma-mass spectroscopy. Tm_ppm_NA Number Double Thulium, in parts per million, by neutron activation. Tm_ppm_XRF Number Double Thulium, in parts per million, by X-ray fluorescence spectroscopy. Tm-CV_pct_NA Number Double Thulium, coefficient of variance, in weight percent, by neutron activation. U_ppm_AES Number Double Uranium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. U_ppm_CM Number Double Uranium, parts per million, by colorimetry. U_ppm_CM/P Number Double Uranium, parts per million, by colorimetry after partial digestion. U_ppm_ES Number Double Uranium, in parts per million, by direct-current arc emission spectrography. U_ppm_FL Number Double Uranium, in parts per million, by fluorometry. U_ppm_MS Number Double Uranium, in parts per million, by inductively coupled plasma-mass spectroscopy. U_ppm_NA Number Double Uranium, in parts per million, by neutron activation. U_ppm_XRF Number Double Uranium, in parts per million, by X-ray fluorescence spectroscopy. U-CV_pct_NA Number Double Uranium, coefficient of variance, in weight percent, by neutron activation. U-eq_ppm_GRC Number Double Uranium, equvalent, in parts per million, by gamma ray count. V_ppm_AA Number Double Vanadium, in parts per million, by atomic absorption spectrophotometry. V_ppm_AES Number Double Vanadium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. V_ppm_AES/P Number Double Vanadium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. V_ppm_ES Number Double Vanadium, in parts per million, by direct-current arc emission spectrography. V_ppm_GV Number Double Vanadium, in parts per million, by gravimetry. V_ppm_MS Number Double Vanadium, in parts per million, by inductively coupled plasma-mass spectroscopy. V_ppm_XRF Number Double Vanadium, in parts per million, by X-ray fluorescence spectroscopy. W_ppm_AES/P Number Double Tungsten, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. W_ppm_CM Number Double Tungsten, parts per million, by colorimetry. W_ppm_CM/P Number Double Tungsten, parts per million, by colorimetry after partial digestion. W_ppm_ES Number Double Tungsten, in parts per million, by direct-current arc emission spectrography. W_ppm_MS Number Double Tungsten, in parts per million, by inductively coupled plasma-mass spectroscopy. W_ppm_NA Number Double Tungsten, in parts per million, by neutron activation. W_ppm_XRF Number Double Tungsten, in parts per million, by X-ray fluorescence spectroscopy. W-CV_pct_NA Number Double Tungsten, coefficient of variance, in weight percent, by neutron activation. Y_ppm_AES Number Double Yttrium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Y_ppm_AES/P Number Double Yttrium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Y_ppm_ES Number Double Yttrium, in parts per million, by direct-current arc emission spectrography. Y_ppm_MS Number Double Yttrium, in parts per million, by inductively coupled plasma-mass spectroscopy. Y_ppm_XRF Number Double Yttrium, in parts per million, by X-ray fluorescence spectroscopy. Yb_ppm_AES Number Double Ytterbium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Yb_ppm_ES Number Double Ytterbium, in parts per million, by direct-current arc emission spectrography. Yb_ppm_MS Number Double Ytterbium, in parts per million, by inductively coupled plasma-mass spectroscopy. Yb_ppm_NA Number Double Ytterbium, in parts per million, by neutron activation. Yb_ppm_XRF Number Double Ytterbium, in parts per million, by X-ray fluorescence spectroscopy. Yb-CV_pct_NA Number Double Ytterbium, coefficient of variance, in weight percent, by neutron activation. Zn_ppm_AA Number Double Zinc, in parts per million, by atomic absorption spectrophotometry. Zn_ppm_AA/P Number Double Zinc, in parts per million, by atomic absorption spectrophotometry after partial digestion. Zn_ppm_AES Number Double Zinc, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Zn_ppm_AES/P Number Double Zinc, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Zn_ppm_CM Number Double Zinc, parts per million, by colorimetry. Zn_ppm_CM/P Number Double Zinc, parts per million, by colorimetry after partial digestion. Zn_ppm_ES Number Double Zinc, in parts per million, by direct-current arc emission spectrography. Zn_ppm_MS Number Double Zinc, in parts per million, by inductively coupled plasma-mass spectroscopy. Zn_ppm_NA Number Double Zinc, in parts per million, by neutron activation. Zn_ppm_XRF Number Double Zinc, in parts per million, by X-ray fluorescence spectroscopy. Zn-CV_pct_NA Number Double Zinc, coefficient of variance, in weight percent, by neutron activation. Zr_ppm_AES Number Double Zirconium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Zr_ppm_AES/P Number Double Zirconium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Zr_ppm_ES Number Double Zirconium, in parts per million, by direct-current arc emission spectrography. Zr_ppm_GV Number Double Zirconium, in parts per million, by gravimetry. Zr_ppm_MS Number Double Zirconium, in parts per million, by inductively coupled plasma-mass spectroscopy. Zr_ppm_NA Number Double Zirconium, in parts per million, by neutron activation. Zr_ppm_XRF Number Double Zirconium, in parts per million, by X-ray fluorescence spectroscopy. Zr-CV_pct_NA Number Double Zirconium, coefficient of variance, in weight percent, by neutron activation.

    Entity_and_Attribute_Detail_Citation:
    database designer/metadata author Matthew Granitto; see Data_Quality_Information/Lineage/Process_Step/Process_Contact/Contact_Information.
    Entity_and_Attribute_Overview:
    The table Chem_Sed_Ag-Mg is a table of chemical data - silver through magnesium - for sediment samples.

    FIELD_NAME FIELD_TYPE FIELD_SIZE FIELD_DESC LAB_ID Number Double Unique identifier assigned to each submitted sample by the Sample Control Officer of the analytical laboratory that received the sample. FIELD_ID Number Double Field identifier assigned by the sample collector of sample submitted for analysis, possibly corrected by data renovator due to truncation of data entry. JOB_ID Number Double Laboratory batch identifier assigned by the Sample Control Officer of the analytical laboratory that received the samples as a batch. LATITUDE Number Decimal Latitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 LONGITUDE Number Decimal Longitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 Ag_ppm_AA Number Double Silver, in parts per million, by atomic absorption spectrophotometry. Ag_ppm_AA/P Number Double Silver, in parts per million, by atomic absorption spectrophotometry after partial digestion. Ag_ppm_AES Number Double Silver, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ag_ppm_AES/P Number Double Silver, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Ag_ppm_ES Number Double Silver, in parts per million, by direct-current arc emission spectrography. Ag_ppm_MS Number Double Silver, in parts per million, by inductively coupled plasma-mass spectroscopy. Ag_ppm_XRF Number Double Silver, in parts per million, by X-ray fluorescence spectroscopy. Al_pct_AES Number Double Aluminum, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Al_pct_AES/P Number Double Aluminum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Al_pct_CM Number Double Aluminum, in weight percent, by colorimetry. Al_pct_ES Number Double Aluminum, in weight percent, by direct-current arc emission spectrography. Al_pct_MS Number Double Aluminum, in weight percent, by inductively coupled plasma-mass spectroscopy. Al_pct_NA Number Double Aluminum, in weight percent, by neutron activation. Al_pct_XRF Number Double Aluminum, in weight percent, by X-ray fluorescence spectroscopy. Al_ppm_AES/P Number Double Aluminum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. As_ppm_AA Number Double Arsenic, in parts per million, by atomic absorption spectrophotometry. As_ppm_AA/P Number Double Arsenic, in parts per million, by atomic absorption spectrophotometry after partial digestion. As_ppm_AES Number Double Arsenic, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. As_ppm_AES/P Number Double Arsenic, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. As_ppm_CM Number Double Arsenic, parts per million, by colorimetry. As_ppm_CM/P Number Double Arsenic, parts per million, by colorimetry after partial digestion. As_ppm_ES Number Double Arsenic, in parts per million, by direct-current arc emission spectrography. As_ppm_MS Number Double Arsenic, in parts per million, by inductively coupled plasma-mass spectroscopy. As_ppm_XRF Number Double Arsenic, in parts per million, by X-ray fluorescence spectroscopy. Ash_pct_CB Number Double Ash, in weight percent, by combustion. Au_ppm_AA Number Double Gold, in parts per million, by atomic absorption spectrophotometry. Au_ppm_AES Number Double Gold, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Au_ppm_AES/P Number Double Gold, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Au_ppm_ES Number Double Gold, in parts per million, by direct-current arc emission spectrography. Au_ppm_FA Number Double Gold, in parts per million, by fire assay. Au_ppm_MS Number Double Gold, in parts per million, by inductively coupled plasma-mass spectroscopy. Au_ppm_NA Number Double Gold, in parts per million, by neutron activation. B_ppm_AES Number Double Boron, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. B_ppm_AES/P Number Double Boron, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. B_ppm_ES Number Double Boron, in parts per million, by direct-current arc emission spectrography. Ba_ppm_AES Number Double Barium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ba_ppm_AES/P Number Double Barium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Ba_ppm_ES Number Double Barium, in parts per million, by direct-current arc emission spectrography. Ba_ppm_MS Number Double Barium, in parts per million, by inductively coupled plasma-mass spectroscopy. Ba_ppm_NA Number Double Barium, in parts per million, by neutron activation. Ba_ppm_XRF Number Double Barium, in parts per million, by X-ray fluorescence spectroscopy. Be_ppm_AES Number Double Beryllium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Be_ppm_AES/P Number Double Beryllium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Be_ppm_ES Number Double Beryllium, in parts per million, by direct-current arc emission spectrography. Be_ppm_MS Number Double Beryllium, in parts per million, by inductively coupled plasma-mass spectroscopy. Bi_ppm_AA Number Double Bismuth, in parts per million, by atomic absorption spectrophotometry. Bi_ppm_AA/P Number Double Bismuth, in parts per million, by atomic absorption spectrophotometry after partial digestion. Bi_ppm_AES Number Double Bismuth, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Bi_ppm_AES/P Number Double Bismuth, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Bi_ppm_ES Number Double Bismuth, in parts per million, by direct-current arc emission spectrography. Bi_ppm_MS Number Double Bismuth, in parts per million, by inductively coupled plasma-mass spectroscopy. Bi_ppm_XRF Number Double Bismuth, in parts per million, by X-ray fluorescence spectroscopy. C_pct_CB Number Double Total carbon, in weight percent, by combustion. Ca_pct_AA Number Double Calcium, in weight percent, by atomic absorption spectrophotometry. Ca_pct_AES Number Double Calcium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Ca_pct_AES/P Number Double Calcium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Ca_pct_CM Number Double Calcium, in weight percent, by colorimetry. Ca_pct_ES Number Double Calcium, in weight percent, by direct-current arc emission spectrography. Ca_pct_MS Number Double Calcium, in weight percent, by inductively coupled plasma-mass spectroscopy. Ca_pct_NA Number Double Calcium, in weight percent, by neutron activation. Ca_pct_XRF Number Double Calcium, in weight percent, by X-ray fluorescence spectroscopy. Ca_ppm_AES/P Number Double Calcium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. C-CO3_pct_TT Number Double Carbonate carbon, in weight percent, by titration. C-CO3_pct_VOL Number Double Carbonate carbon, in weight percent, by a volumetric method. Cd_ppm_AA Number Double Cadmium, in parts per million, by atomic absorption spectrophotometry. Cd_ppm_AA/P Number Double Cadmium, in parts per million, by atomic absorption spectrophotometry after partial digestion. Cd_ppm_AES Number Double Cadmium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Cd_ppm_AES/P Number Double Cadmium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Cd_ppm_ES Number Double Cadmium, in parts per million, by direct-current arc emission spectrography. Cd_ppm_MS Number Double Cadmium, in parts per million, by inductively coupled plasma-mass spectroscopy. Cd_ppm_XRF Number Double Cadmium, in parts per million, by X-ray fluorescence spectroscopy. Ce_ppm_AES Number Double Cerium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ce_ppm_AES/P Number Double Cerium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Ce_ppm_ES Number Double Cerium, in parts per million, by direct-current arc emission spectrography. Ce_ppm_MS Number Double Cerium, in parts per million, by inductively coupled plasma-mass spectroscopy. Ce_ppm_NA Number Double Cerium, in parts per million, by neutron activation. Ce_ppm_XRF Number Double Cerium, in parts per million, by X-ray fluorescence spectroscopy. Cl_pct_CM Number Double Chlorine, in weight percent, by colorimetry. Cl_pct_NA Number Double Chlorine, in weight percent, by neutron activation. Cl_pct_XRF Number Double Chlorine, in weight percent, by X-ray fluorescence spectroscopy. Co_ppm_AES Number Double Cobalt, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Co_ppm_AES/P Number Double Cobalt, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Co_ppm_ES Number Double Cobalt, in parts per million, by direct-current arc emission spectrography. Co_ppm_MS Number Double Cobalt, in parts per million, by inductively coupled plasma-mass spectroscopy. Co_ppm_NA Number Double Cobalt, in parts per million, by neutron activation. CO2_pct_TT Number Double Carbon dioxide, in weight percent, by titration. CO2_pct_VOL Number Double Carbon dioxide, in weight percent, by a volumetric method. Cond-Site_uS/cm_CD Number Double Conductance, of water at sample site, in micro-Siemens per centimeter, by conductance. C-org_pct_CP Number Double Organic carbon, in weight percent, by computation. Cr_ppm_AES Number Double Chromium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Cr_ppm_AES/P Number Double Chromium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Cr_ppm_ES Number Double Chromium, in parts per million, by direct-current arc emission spectrography. Cr_ppm_MS Number Double Chromium, in parts per million, by inductively coupled plasma-mass spectroscopy. Cr_ppm_NA Number Double Chromium, in parts per million, by neutron activation. Cr_ppm_XRF Number Double Chromium, in parts per million, by X-ray fluorescence spectroscopy. Cs_ppm_MS Number Double Cesium, in parts per million, by inductively coupled plasma-mass spectroscopy. Cs_ppm_NA Number Double Cesium, in parts per million, by neutron activation. Cu_ppm_AA Number Double Copper, in parts per million, by atomic absorption spectrophotometry. Cu_ppm_AA/P Number Double Copper, in parts per million, by atomic absorption spectrophotometry after partial digestion. Cu_ppm_AES Number Double Copper, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Cu_ppm_AES/P Number Double Copper, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Cu_ppm_CM/P Number Double Copper, parts per million, by colorimetry after partial digestion. Cu_ppm_ES Number Double Copper, in parts per million, by direct-current arc emission spectrography. Cu_ppm_MS Number Double Copper, in parts per million, by inductively coupled plasma-mass spectroscopy. Cu_ppm_XRF Number Double Copper, in parts per million, by X-ray fluorescence spectroscopy. Dy_ppm_ES Number Double Dysprosium, in parts per million, by direct-current arc emission spectrography. Dy_ppm_MS Number Double Dysprosium, in parts per million, by inductively coupled plasma-mass spectroscopy. Dy_ppm_NA Number Double Dysprosium, in parts per million, by neutron activation. Er_ppm_ES Number Double Erbium, in parts per million, by direct-current arc emission spectrography. Er_ppm_MS Number Double Erbium, in parts per million, by inductively coupled plasma-mass spectroscopy. Eu_ppm_AES Number Double Europium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Eu_ppm_ES Number Double Europium, in parts per million, by direct-current arc emission spectrography. Eu_ppm_MS Number Double Europium, in parts per million, by inductively coupled plasma-mass spectroscopy. Eu_ppm_NA Number Double Europium, in parts per million, by neutron activation. F_pct_ISE Number Double Fluorine, in weight percent, by ion specific electrode. Fe_pct_AA Number Double Iron, in weight percent, by atomic absorption spectrophotometry. Fe_pct_AES Number Double Iron, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Fe_pct_AES/P Number Double Iron, in weight percent, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Fe_pct_CM-TT Number Double Iron, in weight percent, by colorimetry and titration. Fe_pct_ES Number Double Iron, in weight percent, by direct-current arc emission spectrography. Fe_pct_MS Number Double Iron, in weight percent, by inductively coupled plasma-mass spectroscopy. Fe_pct_NA Number Double Iron, in weight percent, by neutron activation. Fe_pct_XRF Number Double Iron, in weight percent, by X-ray fluorescence spectroscopy. Fe_ppm_AES/P Number Double Iron, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Ga_ppm_AES Number Double Gallium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ga_ppm_ES Number Double Gallium, in parts per million, by direct-current arc emission spectrography. Ga_ppm_MS Number Double Gallium, in parts per million, by inductively coupled plasma-mass spectroscopy. Gd_ppm_ES Number Double Gadolinium, in parts per million, by direct-current arc emission spectrography. Gd_ppm_MS Number Double Gadolinium, in parts per million, by inductively coupled plasma-mass spectroscopy. Gd_ppm_NA Number Double Gadolinium, in parts per million, by neutron activation. Ge_ppm_ES Number Double Germanium, in parts per million, by direct-current arc emission spectrography. H2O-_pct_GV Number Double Moisture, in weight percent, by gravimetry. H2O+_pct_GV Number Double Bound water, in weight percent, by gravimetry. Hf_ppm_AES Number Double Hafnium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Hf_ppm_ES Number Double Hafnium, in parts per million, by direct-current arc emission spectrography. Hf_ppm_NA Number Double Hafnium, in parts per million, by neutron activation. Hg_ppm_AA Number Double Mercury, in parts per million, by atomic absorption spectrophotometry. Hg_ppm_ES Number Double Mercury, in parts per million, by direct-current arc emission spectrography. HM_ppm_CM/P Number Double Heavy metals, parts per million, by colorimetry after partial digestion. Ho_ppm_AES Number Double Holmium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ho_ppm_ES Number Double Holmium, in parts per million, by direct-current arc emission spectrography. Ho_ppm_MS Number Double Holmium, in parts per million, by inductively coupled plasma-mass spectroscopy. In_ppm_ES Number Double Indium, in parts per million, by direct-current arc emission spectrography. In_ppm_MS Number Double Indium, in parts per million, by inductively coupled plasma-mass spectroscopy. Ir_ppm_FA Number Double Iridium, in parts per million, by fire assay. K_pct_AA Number Double Potassium, in weight percent, by atomic absorption spectrophotometry. K_pct_AES Number Double Potassium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. K_pct_ES Number Double Potassium, in weight percent, by direct-current arc emission spectrography. K_pct_MS Number Double Potassium, in weight percent, by inductively coupled plasma-mass spectroscopy. K_pct_NA Number Double Potassium, in weight percent, by neutron activation. K_pct_XRF Number Double Potassium, in weight percent, by neutron activation. K_ppm_AES/P Number Double Potassium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. La_ppm_AES Number Double Lanthanum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. La_ppm_AES/P Number Double Lanthanum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. La_ppm_ES Number Double Lanthanum, in parts per million, by direct-current arc emission spectrography. La_ppm_MS Number Double Lanthanum, in parts per million, by inductively coupled plasma-mass spectroscopy. La_ppm_NA Number Double Lanthanum, in parts per million, by neutron activation. La_ppm_XRF Number Double Lanthanum, in parts per million, by X-ray fluorescence spectroscopy. Li_ppm_AA Number Double Lithium, in parts per million, by atomic absorption spectrophotometry. Li_ppm_AES Number Double Lithium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Li_ppm_AES/P Number Double Lithium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Li_ppm_ES Number Double Lithium, in parts per million, by direct-current arc emission spectrography. Li_ppm_MS Number Double Lithium, in parts per million, by inductively coupled plasma-mass spectroscopy. LOI_pct_CB Number Double Loss on ignition, in weight percent, by combustion. Lu_ppm_ES Number Double Lutetium, in parts per million, by direct-current arc emission spectrography. Lu_ppm_NA Number Double Lutetium, in parts per million, by neutron activation. Mg_pct_AA Number Double Magnesium, in weight percent, by atomic absorption spectrophotometry. Mg_pct_AES Number Double Magnesium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Mg_pct_AES/P Number Double Magnesium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Mg_pct_CM Number Double Magnesium, in weight percent, by colorimetry. Mg_pct_ES Number Double Magnesium, in weight percent, by direct-current arc emission spectrography. Mg_pct_MS Number Double Magnesium, in weight percent, by inductively coupled plasma-mass spectroscopy. Mg_pct_NA Number Double Magnesium, in weight percent, by neutron activation. Mg_pct_XRF Number Double Magnesium, in weight percent, by X-ray fluorescence spectroscopy. Mg_ppm_AES/P Number Double Magnesium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach.

    Entity_and_Attribute_Detail_Citation:
    database designer/metadata author Matthew Granitto; see Data_Quality_Information/Lineage/Process_Step/Process_Contact/Contact_Information.
    Entity_and_Attribute_Overview:
    The table Chem_Sed_Mn-Zr is a table of chemical data - manganese through zirconium - for sediment samples.

    FIELD_NAME FIELD_TYPE FIELD_SIZE FIELD_DESC LAB_ID Number Double Unique identifier assigned to each submitted sample by the Sample Control Officer of the analytical laboratory that received the sample. FIELD_ID Number Double Field identifier assigned by the sample collector of sample submitted for analysis, possibly corrected by data renovator due to truncation of data entry. JOB_ID Number Double Laboratory batch identifier assigned by the Sample Control Officer of the analytical laboratory that received the samples as a batch. LATITUDE Number Decimal Latitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 LONGITUDE Number Decimal Longitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 Mn_pct_AA Number Double Manganese, in weight percent, by atomic absorption spectrophotometry. Mn_pct_AES Number Double Manganese, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Mn_pct_CM Number Double Manganese, in weight percent, by colorimetry. Mn_pct_ES Number Double Manganese, in weight percent, by direct-current arc emission spectrography. Mn_pct_MS Number Double Manganese, in weight percent, by inductively coupled plasma-mass spectroscopy. Mn_pct_NA Number Double Manganese, in weight percent, by neutron activation. Mn_pct_XRF Number Double Manganese, in weight percent, by X-ray fluorescence spectroscopy. Mn_ppm_AES/P Number Double Manganese, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Mo_ppm_AA Number Double Molybdenum, in parts per million, by atomic absorption spectrophotometry. Mo_ppm_AES Number Double Molybdenum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Mo_ppm_AES/P Number Double Molybdenum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Mo_ppm_CM Number Double Molybdenum, parts per million, by colorimetry. Mo_ppm_CM/P Number Double Molybdenum, parts per million, by colorimetry after partial digestion. Mo_ppm_ES Number Double Molybdenum, in parts per million, by direct-current arc emission spectrography. Mo_ppm_MS Number Double Molybdenum, in parts per million, by inductively coupled plasma-mass spectroscopy. Na_pct_AA Number Double Sodium, in weight percent, by atomic absorption spectrophotometry. Na_pct_AES Number Double Sodium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Na_pct_ES Number Double Sodium, in weight percent, by direct-current arc emission spectrography. Na_pct_MS Number Double Sodium, in weight percent, by inductively coupled plasma-mass spectroscopy. Na_pct_NA Number Double Sodium, in weight percent, by neutron activation. Na_pct_XRF Number Double Sodium, in weight percent, by X-ray fluorescence spectroscopy. Na_ppm_AES/P Number Double Sodium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Nb_ppm_AES Number Double Niobium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Nb_ppm_AES/P Number Double Niobium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Nb_ppm_ES Number Double Niobium, in parts per million, by direct-current arc emission spectrography. Nb_ppm_MS Number Double Niobium, in parts per million, by inductively coupled plasma-mass spectroscopy. Nb_ppm_XRF Number Double Niobium, in parts per million, by X-ray fluorescence spectroscopy. Nd_ppm_AES Number Double Neodymium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Nd_ppm_ES Number Double Neodymium, in parts per million, by direct-current arc emission spectrography. Nd_ppm_MS Number Double Neodymium, in parts per million, by inductively coupled plasma-mass spectroscopy. Nd_ppm_NA Number Double Neodymium, in parts per million, by neutron activation. Ni_ppm_AA Number Double Nickel, in parts per million, by atomic absorption spectrophotometry. Ni_ppm_AES Number Double Nickel, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ni_ppm_AES/P Number Double Nickel, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Ni_ppm_ES Number Double Nickel, in parts per million, by direct-current arc emission spectrography. Ni_ppm_MS Number Double Nickel, in parts per million, by inductively coupled plasma-mass spectroscopy. Ni_ppm_XRF Number Double Nickel, in parts per million, by X-ray fluorescence spectroscopy. P_pct_AES Number Double Phosphorus, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. P_pct_AES/P Number Double Phosphorus, in weight percent, by inductively coupled plasma-atomic emission spectroscopy after acid leach. P_pct_CM Number Double Phosphorus, in weight percent, by colorimetry. P_pct_ES Number Double Phosphorus, in weight percent, by direct-current arc emission spectrography. P_pct_MS Number Double Phosphorus, in weight percent, by inductively coupled plasma-mass spectroscopy. P_pct_XRF Number Double Phosphorus, in weight percent, by X-ray fluorescence spectroscopy. P_ppm_AES/P Number Double Phosphorus, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Pb_ppm_AA Number Double Lead, in parts per million, by atomic absorption spectrophotometry. Pb_ppm_AA/P Number Double Lead, in parts per million, by atomic absorption spectrophotometry after partial digestion. Pb_ppm_AES Number Double Lead, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Pb_ppm_AES/P Number Double Lead, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Pb_ppm_CM/P Number Double Lead, parts per million, by colorimetry after partial digestion. Pb_ppm_ES Number Double Lead, in parts per million, by direct-current arc emission spectrography. Pb_ppm_MS Number Double Lead, in parts per million, by inductively coupled plasma-mass spectroscopy. Pb_ppm_XRF Number Double Lead, in parts per million, by X-ray fluorescence spectroscopy. Pd_ppm_ES Number Double Palladium, in parts per million, by direct-current arc emission spectrography. Pd_ppm_FA Number Double Palladium, in parts per million, by fire assay. pH-Site_SI_ISE Number Double pH, of water at sample site, in standard units, by electrode. Pr_ppm_ES Number Double Praseodymium, in parts per million, by direct-current arc emission spectrography. Pr_ppm_MS Number Double Praseodymium, in parts per million, by inductively coupled plasma-mass spectroscopy. Pt_ppm_ES Number Double Platinum, in parts per million, by direct-current arc emission spectrography. Pt_ppm_FA Number Double Platinum, in parts per million, by fire assay. Rb_ppm_AA Number Double Rubidium, in parts per million, by atomic absorption spectrophotometry. Rb_ppm_MS Number Double Rubidium, in parts per million, by inductively coupled plasma-mass spectroscopy. Rb_ppm_NA Number Double Rubidium, in parts per million, by neutron activation. Rb_ppm_XRF Number Double Rubidium, in parts per million, by X-ray fluorescence spectroscopy. Re_ppm_ES Number Double Rhenium, in parts per million, by direct-current arc emission spectrography. Rh_ppm_FA Number Double Rhodium, in parts per million, by fire assay. Ru_ppm_FA Number Double Ruthenium, in parts per million, by fire assay. S_pct_AES Number Double Total sulfur, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. S_pct_CB Number Double Total sulfur, in weight percent, by combustion. S_pct_CM Number Double Total sulfur, in weight percent, by colorimetry. S_pct_XRF Number Double Total sulfur, in weight percent, by X-ray fluorescence spectroscopy. S_ppm_AES/P Number Double Total sulfur, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Sb_ppm_AA Number Double Antimony, in parts per million, by atomic absorption spectrophotometry. Sb_ppm_AA/P Number Double Antimony, in parts per million, by atomic absorption spectrophotometry after partial digestion. Sb_ppm_AES Number Double Antimony, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Sb_ppm_AES/P Number Double Antimony, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Sb_ppm_ES Number Double Antimony, in parts per million, by direct-current arc emission spectrography. Sb_ppm_MS Number Double Antimony, in parts per million, by inductively coupled plasma-mass spectroscopy. Sb_ppm_NA Number Double Antimony, in parts per million, by neutron activation. Sc_ppm_AES Number Double Scandium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Sc_ppm_ES Number Double Scandium, in parts per million, by direct-current arc emission spectrography. Sc_ppm_MS Number Double Scandium, in parts per million, by inductively coupled plasma-mass spectroscopy. Sc_ppm_NA Number Double Scandium, in parts per million, by neutron activation. Se_ppm_AA Number Double Selenium, in parts per million, by atomic absorption spectrophotometry. Se_ppm_ES Number Double Selenium, in parts per million, by direct-current arc emission spectrography. Se_ppm_MS Number Double Selenium, in parts per million, by inductively coupled plasma-mass spectroscopy. Se_ppm_XRF Number Double Selenium, in parts per million, by X-ray fluorescence spectroscopy. Si_pct_AES Number Double Silicon, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Si_pct_AES/P Number Double Silicon, in weight percent, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Si_pct_CM Number Double Silicon, in weight percent, by colorimetry. Si_pct_ES Number Double Silicon, in weight percent, by direct-current arc emission spectrography. Si_pct_XRF Number Double Silicon, in weight percent, by X-ray fluorescence spectroscopy. Si_ppm_AES/P Number Double Silicon, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Sm_ppm_ES Number Double Samarium, in parts per million, by direct-current arc emission spectrography. Sm_ppm_MS Number Double Samarium, in parts per million, by inductively coupled plasma-mass spectroscopy. Sm_ppm_NA Number Double Samarium, in parts per million, by neutron activation. Sn_ppm_AA/P Number Double Tin, in parts per million, by atomic absorption spectrophotometry after partial digestion. Sn_ppm_AES Number Double Tin, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Sn_ppm_AES/P Number Double Tin, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Sn_ppm_ES Number Double Tin, in parts per million, by direct-current arc emission spectrography. Sn_ppm_MS Number Double Tin, in parts per million, by inductively coupled plasma-mass spectroscopy. Sn_ppm_XRF Number Double Tin, in parts per million, by X-ray fluorescence spectroscopy. SplWt-Au_g_GV Number Double Sample weight, for gold analysis, in grams, by gravimetry. SplWt-FA_g_GV Number Double Sample weight, for fire assay analysis, in grams, by gravimetry. Sr_ppm_AES Number Double Strontium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Sr_ppm_AES/P Number Double Strontium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Sr_ppm_ES Number Double Strontium, in parts per million, by direct-current arc emission spectrography. Sr_ppm_MS Number Double Strontium, in parts per million, by inductively coupled plasma-mass spectroscopy. Sr_ppm_NA Number Double Strontium, in parts per million, by neutron activation. Sr_ppm_XRF Number Double Strontium, in parts per million, by X-ray fluorescence spectroscopy. Ta_ppm_AES Number Double Tantalum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ta_ppm_ES Number Double Tantalum, in parts per million, by direct-current arc emission spectrography. Ta_ppm_MS Number Double Tantalum, in parts per million, by inductively coupled plasma-mass spectroscopy. Ta_ppm_NA Number Double Tantalum, in parts per million, by neutron activation. Tb_ppm_ES Number Double Terbium, in parts per million, by direct-current arc emission spectrography. Tb_ppm_MS Number Double Terbium, in parts per million, by inductively coupled plasma-mass spectroscopy. Tb_ppm_NA Number Double Terbium, in parts per million, by neutron activation. Te_ppm_AA Number Double Tellurium, in parts per million, by atomic absorption spectrophotometry. Te_ppm_ES Number Double Tellurium, in parts per million, by direct-current arc emission spectrography. Te_ppm_MS Number Double Tellurium, in parts per million, by inductively coupled plasma-mass spectroscopy. Th_ppm_AES Number Double Thorium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Th_ppm_AES/P Number Double Thorium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Th_ppm_ES Number Double Thorium, in parts per million, by direct-current arc emission spectrography. Th_ppm_MS Number Double Thorium, in parts per million, by inductively coupled plasma-mass spectroscopy. Th_ppm_NA Number Double Thorium, in parts per million, by neutron activation. Th-CV_pct_NA Number Double Thorium, coefficient of variance, in weight percent, by neutron activation. Ti_pct_AES Number Double Titanium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Ti_pct_AES/P Number Double Titanium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Ti_pct_CM Number Double Titanium, in weight percent, by colorimetry. Ti_pct_ES Number Double Titanium, in weight percent, by direct-current arc emission spectrography. Ti_pct_MS Number Double Titanium, in weight percent, by inductively coupled plasma-mass spectroscopy. Ti_pct_NA Number Double Titanium, in weight percent, by neutron activation. Ti_pct_XRF Number Double Titanium, in weight percent, by X-ray fluorescence spectroscopy. Ti_ppm_AES/P Number Double Titanium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Tl_ppm_ES Number Double Thallium, in parts per million, by direct-current arc emission spectrography. Tl_ppm_MS Number Double Thallium, in parts per million, by inductively coupled plasma-mass spectroscopy. Tm_ppm_ES Number Double Thulium, in parts per million, by direct-current arc emission spectrography. Tm_ppm_MS Number Double Thulium, in parts per million, by inductively coupled plasma-mass spectroscopy. Tm_ppm_NA Number Double Thulium, in parts per million, by neutron activation. U_ppm_AES Number Double Uranium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. U_ppm_ES Number Double Uranium, in parts per million, by direct-current arc emission spectrography. U_ppm_FL Number Double Uranium, in parts per million, by fluorometry. U_ppm_MS Number Double Uranium, in parts per million, by inductively coupled plasma-mass spectroscopy. U_ppm_NA Number Double Uranium, in parts per million, by neutron activation. U-CV_pct_NA Number Double Uranium, coefficient of variance, in weight percent, by neutron activation. U-eq_ppm_GRC Number Double Uranium, equvalent, in parts per million, by gamma ray count. U-eq-Site_ppm_GRC Number Double Uranium, equvalent, at sample site, in parts per million, by gamma ray count. V_ppm_AES Number Double Vanadium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. V_ppm_AES/P Number Double Vanadium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. V_ppm_ES Number Double Vanadium, in parts per million, by direct-current arc emission spectrography. V_ppm_MS Number Double Vanadium, in parts per million, by inductively coupled plasma-mass spectroscopy. V_ppm_NA Number Double Vanadium, in parts per million, by neutron activation. W_ppm_AES/P Number Double Tungsten, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. W_ppm_CM Number Double Tungsten, parts per million, by colorimetry. W_ppm_CM/P Number Double Tungsten, parts per million, by colorimetry after partial digestion. W_ppm_ES Number Double Tungsten, in parts per million, by direct-current arc emission spectrography. W_ppm_MS Number Double Tungsten, in parts per million, by inductively coupled plasma-mass spectroscopy. W_ppm_XRF Number Double Tungsten, in parts per million, by X-ray fluorescence spectroscopy. Y_ppm_AES Number Double Yttrium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Y_ppm_AES/P Number Double Yttrium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Y_ppm_ES Number Double Yttrium, in parts per million, by direct-current arc emission spectrography. Y_ppm_MS Number Double Yttrium, in parts per million, by inductively coupled plasma-mass spectroscopy. Y_ppm_XRF Number Double Yttrium, in parts per million, by X-ray fluorescence spectroscopy. Yb_ppm_AES Number Double Ytterbium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Yb_ppm_ES Number Double Ytterbium, in parts per million, by direct-current arc emission spectrography. Yb_ppm_MS Number Double Ytterbium, in parts per million, by inductively coupled plasma-mass spectroscopy. Yb_ppm_NA Number Double Ytterbium, in parts per million, by neutron activation. Zn_ppm_AA Number Double Zinc, in parts per million, by atomic absorption spectrophotometry. Zn_ppm_AA/P Number Double Zinc, in parts per million, by atomic absorption spectrophotometry after partial digestion. Zn_ppm_AES Number Double Zinc, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Zn_ppm_AES/P Number Double Zinc, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Zn_ppm_CM/P Number Double Zinc, parts per million, by colorimetry after partial digestion. Zn_ppm_ES Number Double Zinc, in parts per million, by direct-current arc emission spectrography. Zn_ppm_MS Number Double Zinc, in parts per million, by inductively coupled plasma-mass spectroscopy. Zn_ppm_NA Number Double Zinc, in parts per million, by neutron activation. Zn_ppm_XRF Number Double Zinc, in parts per million, by X-ray fluorescence spectroscopy. Zr_ppm_AES Number Double Zirconium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Zr_ppm_AES/P Number Double Zirconium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after acid leach. Zr_ppm_ES Number Double Zirconium, in parts per million, by direct-current arc emission spectrography. Zr_ppm_NA Number Double Zirconium, in parts per million, by neutron activation. Zr_ppm_XRF Number Double Zirconium, in parts per million, by X-ray fluorescence spectroscopy.

    Entity_and_Attribute_Detail_Citation:
    database designer/metadata author Matthew Granitto; see Data_Quality_Information/Lineage/Process_Step/Process_Contact/Contact_Information.
    Entity_and_Attribute_Overview:
    The table Chem_Soil_Ag-Mg is a table of chemical data - silver through magnesium - for soil samples.

    FIELD_NAME FIELD_TYPE FIELD_SIZE FIELD_DESC LAB_ID Number Double Unique identifier assigned to each submitted sample by the Sample Control Officer of the analytical laboratory that received the sample. FIELD_ID Number Double Field identifier assigned by the sample collector of sample submitted for analysis, possibly corrected by data renovator due to truncation of data entry. JOB_ID Number Double Laboratory batch identifier assigned by the Sample Control Officer of the analytical laboratory that received the samples as a batch. LATITUDE Number Decimal Latitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 LONGITUDE Number Decimal Longitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 Ag_ppm_AA/P Number Double Silver, in parts per million, by atomic absorption spectrophotometry after partial digestion. Ag_ppm_AES Number Double Silver, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ag_ppm_AES/P Number Double Silver, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Ag_ppm_ES Number Double Silver, in parts per million, by direct-current arc emission spectrography. Ag_ppm_FA Number Double Silver, in parts per million, by fire assay. Ag_ppm_MS Number Double Silver, in parts per million, by inductively coupled plasma-mass spectroscopy. Ag_ppm_XRF Number Double Silver, in parts per million, by X-ray fluorescence spectroscopy. Al_pct_AES Number Double Aluminum, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Al_pct_CM Number Double Aluminum, in weight percent, by colorimetry. Al_pct_ES Number Double Aluminum, in weight percent, by direct-current arc emission spectrography. Al_pct_MS Number Double Aluminum, in weight percent, by inductively coupled plasma-mass spectroscopy. Al_pct_XRF Number Double Aluminum, in weight percent, by X-ray fluorescence spectroscopy. As_ppm_AA Number Double Arsenic, in parts per million, by atomic absorption spectrophotometry. As_ppm_AA/P Number Double Arsenic, in parts per million, by atomic absorption spectrophotometry after partial digestion. As_ppm_AES Number Double Arsenic, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. As_ppm_AES/P Number Double Arsenic, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. As_ppm_CM Number Double Arsenic, parts per million, by colorimetry. As_ppm_ES Number Double Arsenic, in parts per million, by direct-current arc emission spectrography. As_ppm_MS Number Double Arsenic, in parts per million, by inductively coupled plasma-mass spectroscopy. As_ppm_XRF Number Double Arsenic, in parts per million, by X-ray fluorescence spectroscopy. Ash_pct_CB Number Double Ash, in weight percent, by combustion. Au_ppm_AA Number Double Gold, in parts per million, by atomic absorption spectrophotometry. Au_ppm_AES Number Double Gold, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Au_ppm_AES/P Number Double Gold, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Au_ppm_ES Number Double Gold, in parts per million, by direct-current arc emission spectrography. Au_ppm_FA Number Double Gold, in parts per million, by fire assay. Au_ppm_MS Number Double Gold, in parts per million, by inductively coupled plasma-mass spectroscopy. B_ppm_ES Number Double Boron, in parts per million, by direct-current arc emission spectrography. Ba_ppm_AES Number Double Barium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ba_ppm_ES Number Double Barium, in parts per million, by direct-current arc emission spectrography. Ba_ppm_MS Number Double Barium, in parts per million, by inductively coupled plasma-mass spectroscopy. Ba_ppm_NA Number Double Barium, in parts per million, by neutron activation. Ba_ppm_XRF Number Double Barium, in parts per million, by X-ray fluorescence spectroscopy. Be_ppm_AES Number Double Beryllium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Be_ppm_ES Number Double Beryllium, in parts per million, by direct-current arc emission spectrography. Be_ppm_MS Number Double Beryllium, in parts per million, by inductively coupled plasma-mass spectroscopy. Bi_ppm_AA/P Number Double Bismuth, in parts per million, by atomic absorption spectrophotometry after partial digestion. Bi_ppm_AES Number Double Bismuth, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Bi_ppm_AES/P Number Double Bismuth, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Bi_ppm_ES Number Double Bismuth, in parts per million, by direct-current arc emission spectrography. Bi_ppm_MS Number Double Bismuth, in parts per million, by inductively coupled plasma-mass spectroscopy. Bi_ppm_XRF Number Double Bismuth, in parts per million, by X-ray fluorescence spectroscopy. Br_ppm_XRF Number Double Bromine, in parts per million, by X-ray fluorescence spectroscopy. C_pct_CB Number Double Total carbon, in weight percent, by combustion. Ca_pct_AA Number Double Calcium, in weight percent, by atomic absorption spectrophotometry. Ca_pct_AA/P Number Double Calcium, in weight percent, by atomic absorption spectrophotometry after partial digestion. Ca_pct_AES Number Double Calcium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Ca_pct_CM Number Double Calcium, in weight percent, by colorimetry. Ca_pct_ES Number Double Calcium, in weight percent, by direct-current arc emission spectrography. Ca_pct_MS Number Double Calcium, in weight percent, by inductively coupled plasma-mass spectroscopy. Ca_pct_XRF Number Double Calcium, in weight percent, by X-ray fluorescence spectroscopy. C-CO3_pct_TT Number Double Carbonate carbon, in weight percent, by titration. C-CO3_pct_VOL Number Double Carbonate carbon, in weight percent, by a volumetric method. Cd_ppm_AA Number Double Cadmium, in parts per million, by atomic absorption spectrophotometry. Cd_ppm_AA/P Number Double Cadmium, in parts per million, by atomic absorption spectrophotometry after partial digestion. Cd_ppm_AES Number Double Cadmium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Cd_ppm_AES/P Number Double Cadmium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Cd_ppm_ES Number Double Cadmium, in parts per million, by direct-current arc emission spectrography. Cd_ppm_MS Number Double Cadmium, in parts per million, by inductively coupled plasma-mass spectroscopy. Cd_ppm_XRF Number Double Cadmium, in parts per million, by X-ray fluorescence spectroscopy. Ce_ppm_AES Number Double Cerium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ce_ppm_ES Number Double Cerium, in parts per million, by direct-current arc emission spectrography. Ce_ppm_MS Number Double Cerium, in parts per million, by inductively coupled plasma-mass spectroscopy. Ce_ppm_NA Number Double Cerium, in parts per million, by neutron activation. Ce_ppm_XRF Number Double Cerium, in parts per million, by X-ray fluorescence spectroscopy. Cl_pct_CM Number Double Chlorine, in weight percent, by colorimetry. Cl_pct_IC/P Number Double Chloride, in weight percent, by ion chromatography after partial digestion. Cl_pct_ISE Number Double Chlorine, in weight percent, by ion specific electrode. Cl_pct_XRF Number Double Chlorine, in weight percent, by X-ray fluorescence spectroscopy. Cl-_ppm_IC Number Double Chloride, in parts per million, by ion chromatography. Co_ppm_AES Number Double Cobalt, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Co_ppm_ES Number Double Cobalt, in parts per million, by direct-current arc emission spectrography. Co_ppm_MS Number Double Cobalt, in parts per million, by inductively coupled plasma-mass spectroscopy. Co_ppm_NA Number Double Cobalt, in parts per million, by neutron activation. CO2_pct_TT Number Double Carbon dioxide, in weight percent, by titration. CO2_pct_VOL Number Double Carbon dioxide, in weight percent, by a volumetric method. Cond_uS/cm_CD/P Number Double Conductance, in micro-Siemens per centimeter, by conductance after partial digestion. C-org_pct_CB Number Double Organic carbon, in weight percent, by combustion. C-org_pct_CP Number Double Organic carbon, in weight percent, by computation. Cr_ppm_AES Number Double Chromium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Cr_ppm_ES Number Double Chromium, in parts per million, by direct-current arc emission spectrography. Cr_ppm_MS Number Double Chromium, in parts per million, by inductively coupled plasma-mass spectroscopy. Cr_ppm_NA Number Double Chromium, in parts per million, by neutron activation. Cr_ppm_XRF Number Double Chromium, in parts per million, by X-ray fluorescence spectroscopy. Cs_ppm_MS Number Double Cesium, in parts per million, by inductively coupled plasma-mass spectroscopy. Cs_ppm_NA Number Double Cesium, in parts per million, by neutron activation. Cs_ppm_XRF Number Double Cesium, in parts per million, by X-ray fluorescence spectroscopy. Cu_ppm_AA Number Double Copper, in parts per million, by atomic absorption spectrophotometry. Cu_ppm_AA/P Number Double Copper, in parts per million, by atomic absorption spectrophotometry after partial digestion. Cu_ppm_AES Number Double Copper, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Cu_ppm_AES/P Number Double Copper, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Cu_ppm_CM/P Number Double Copper, parts per million, by colorimetry after partial digestion. Cu_ppm_ES Number Double Copper, in parts per million, by direct-current arc emission spectrography. Cu_ppm_MS Number Double Copper, in parts per million, by inductively coupled plasma-mass spectroscopy. Cu_ppm_XRF Number Double Copper, in parts per million, by X-ray fluorescence spectroscopy. Dens-B_g/cc_GV Number Double Bulk density, in grams per cubic centimeter, by gravimetry. Dy_ppm_ES Number Double Dysprosium, in parts per million, by direct-current arc emission spectrography. Dy_ppm_MS Number Double Dysprosium, in parts per million, by inductively coupled plasma-mass spectroscopy. Dy_ppm_NA Number Double Dysprosium, in parts per million, by neutron activation. Er_ppm_ES Number Double Erbium, in parts per million, by direct-current arc emission spectrography. Er_ppm_MS Number Double Erbium, in parts per million, by inductively coupled plasma-mass spectroscopy. Eu_ppm_AES Number Double Europium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Eu_ppm_ES Number Double Europium, in parts per million, by direct-current arc emission spectrography. Eu_ppm_MS Number Double Europium, in parts per million, by inductively coupled plasma-mass spectroscopy. Eu_ppm_NA Number Double Europium, in parts per million, by neutron activation. F_pct_CM Number Double Fluorine, in weight percent, by colorimetry. F_pct_IC/P Number Double Fluoride, in weight percent, by ion chromatography after partial digestion. F_pct_ISE Number Double Fluorine, in weight percent, by ion specific electrode. F-_ppm_IC Number Double Fluoride, in parts per million, by ion chromatography. Fe_pct_AES Number Double Iron, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Fe_pct_CM Number Double Iron, in weight percent, by colorimetry. Fe_pct_CM-TT Number Double Iron, in weight percent, by colorimetry and titration. Fe_pct_ES Number Double Iron, in weight percent, by direct-current arc emission spectrography. Fe_pct_MS Number Double Iron, in weight percent, by inductively coupled plasma-mass spectroscopy. Fe_pct_NA Number Double Iron, in weight percent, by neutron activation. Fe_pct_XRF Number Double Iron, in weight percent, by X-ray fluorescence spectroscopy. Ga_ppm_AES Number Double Gallium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ga_ppm_ES Number Double Gallium, in parts per million, by direct-current arc emission spectrography. Ga_ppm_MS Number Double Gallium, in parts per million, by inductively coupled plasma-mass spectroscopy. Ga_ppm_XRF Number Double Gallium, in parts per million, by X-ray fluorescence spectroscopy. Gd_ppm_ES Number Double Gadolinium, in parts per million, by direct-current arc emission spectrography. Gd_ppm_MS Number Double Gadolinium, in parts per million, by inductively coupled plasma-mass spectroscopy. Gd_ppm_NA Number Double Gadolinium, in parts per million, by neutron activation. Ge_ppm_AA Number Double Germanium, in parts per million, by atomic absorption spectrophotometry. Ge_ppm_ES Number Double Germanium, in parts per million, by direct-current arc emission spectrography. Ge_ppm_MS Number Double Germanium, in parts per million, by inductively coupled plasma-mass spectroscopy. Ge_ppm_XRF Number Double Germanium, in parts per million, by X-ray fluorescence spectroscopy. H2O-_pct_GV Number Double Moisture, in weight percent, by gravimetry. H2O+_pct_GV Number Double Bound water, in weight percent, by gravimetry. Hf_ppm_ES Number Double Hafnium, in parts per million, by direct-current arc emission spectrography. Hf_ppm_NA Number Double Hafnium, in parts per million, by neutron activation. Hg_ppm_AA Number Double Mercury, in parts per million, by atomic absorption spectrophotometry. Hg_ppm_ES Number Double Mercury, in parts per million, by direct-current arc emission spectrography. HM_ppm_CM/P Number Double Heavy metals, parts per million, by colorimetry after partial digestion. Ho_ppm_AES Number Double Holmium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ho_ppm_ES Number Double Holmium, in parts per million, by direct-current arc emission spectrography. Ho_ppm_MS Number Double Holmium, in parts per million, by inductively coupled plasma-mass spectroscopy. I_ppm_XRF Number Double Iodine, in parts per million, by X-ray fluorescence spectroscopy. In_ppm_ES Number Double Indium, in parts per million, by direct-current arc emission spectrography. In_ppm_MS Number Double Indium, in parts per million, by inductively coupled plasma-mass spectroscopy. K_pct_AA Number Double Potassium, in weight percent, by atomic absorption spectrophotometry. K_pct_AES Number Double Potassium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. K_pct_CM Number Double Potassium, in weight percent, by colorimetry. K_pct_ES Number Double Potassium, in weight percent, by direct-current arc emission spectrography. K_pct_MS Number Double Potassium, in weight percent, by inductively coupled plasma-mass spectroscopy. K_pct_NA Number Double Potassium, in weight percent, by neutron activation. K_pct_XRF Number Double Potassium, in weight percent, by neutron activation. La_ppm_AES Number Double Lanthanum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. La_ppm_ES Number Double Lanthanum, in parts per million, by direct-current arc emission spectrography. La_ppm_MS Number Double Lanthanum, in parts per million, by inductively coupled plasma-mass spectroscopy. La_ppm_NA Number Double Lanthanum, in parts per million, by neutron activation. La_ppm_XRF Number Double Lanthanum, in parts per million, by X-ray fluorescence spectroscopy. Li_ppm_AA Number Double Lithium, in parts per million, by atomic absorption spectrophotometry. Li_ppm_AES Number Double Lithium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Li_ppm_ES Number Double Lithium, in parts per million, by direct-current arc emission spectrography. Li_ppm_MS Number Double Lithium, in parts per million, by inductively coupled plasma-mass spectroscopy. LOI_pct_CB Number Double Loss on ignition, in weight percent, by combustion. Lu_ppm_ES Number Double Lutetium, in parts per million, by direct-current arc emission spectrography. Lu_ppm_NA Number Double Lutetium, in parts per million, by neutron activation. Mg_pct_AA Number Double Magnesium, in weight percent, by atomic absorption spectrophotometry. Mg_pct_AA/P Number Double Magnesium, in weight percent, by atomic absorption spectrophotometry after partial digestion. Mg_pct_AES Number Double Magnesium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Mg_pct_CM Number Double Magnesium, in weight percent, by colorimetry. Mg_pct_ES Number Double Magnesium, in weight percent, by direct-current arc emission spectrography. Mg_pct_MS Number Double Magnesium, in weight percent, by inductively coupled plasma-mass spectroscopy. Mg_pct_XRF Number Double Magnesium, in weight percent, by X-ray fluorescence spectroscopy.

    Entity_and_Attribute_Detail_Citation:
    database designer/metadata author Matthew Granitto; see Data_Quality_Information/Lineage/Process_Step/Process_Contact/Contact_Information.
    Entity_and_Attribute_Overview:
    The table Chem_Soil_Mn-Zr is a table of chemical data - manganese through zirconium - for soil samples.

    FIELD_NAME FIELD_TYPE FIELD_SIZE FIELD_DESC LAB_ID Number Double Unique identifier assigned to each submitted sample by the Sample Control Officer of the analytical laboratory that received the sample. FIELD_ID Number Double Field identifier assigned by the sample collector of sample submitted for analysis, possibly corrected by data renovator due to truncation of data entry. JOB_ID Number Double Laboratory batch identifier assigned by the Sample Control Officer of the analytical laboratory that received the samples as a batch. LATITUDE Number Decimal Latitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 LONGITUDE Number Decimal Longitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 Mn_pct_AA Number Double Manganese, in weight percent, by atomic absorption spectrophotometry. Mn_pct_AES Number Double Manganese, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Mn_pct_CM Number Double Manganese, in weight percent, by colorimetry. Mn_pct_ES Number Double Manganese, in weight percent, by direct-current arc emission spectrography. Mn_pct_MS Number Double Manganese, in weight percent, by inductively coupled plasma-mass spectroscopy. Mn_pct_NA Number Double Manganese, in weight percent, by neutron activation. Mn_pct_XRF Number Double Manganese, in weight percent, by X-ray fluorescence spectroscopy. Mn_ppm_AA/P Number Double Manganese, in parts per million, by atomic absorption spectrophotometry after partial digestion. Mo_ppm_AA/P Number Double Molybdenum, in parts per million, by atomic absorption spectrophotometry after partial digestion. Mo_ppm_AES Number Double Molybdenum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Mo_ppm_AES/P Number Double Molybdenum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Mo_ppm_CM Number Double Molybdenum, parts per million, by colorimetry. Mo_ppm_ES Number Double Molybdenum, in parts per million, by direct-current arc emission spectrography. Mo_ppm_MS Number Double Molybdenum, in parts per million, by inductively coupled plasma-mass spectroscopy. Mo_ppm_XRF Number Double Molybdenum, in parts per million, by X-ray fluorescence spectroscopy. Na_pct_AA Number Double Sodium, in weight percent, by atomic absorption spectrophotometry. Na_pct_AES Number Double Sodium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Na_pct_ES Number Double Sodium, in weight percent, by direct-current arc emission spectrography. Na_pct_MS Number Double Sodium, in weight percent, by inductively coupled plasma-mass spectroscopy. Na_pct_NA Number Double Sodium, in weight percent, by neutron activation. Na_pct_XRF Number Double Sodium, in weight percent, by X-ray fluorescence spectroscopy. Nb_ppm_AES Number Double Niobium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Nb_ppm_ES Number Double Niobium, in parts per million, by direct-current arc emission spectrography. Nb_ppm_MS Number Double Niobium, in parts per million, by inductively coupled plasma-mass spectroscopy. Nb_ppm_XRF Number Double Niobium, in parts per million, by X-ray fluorescence spectroscopy. Nd_ppm_AES Number Double Neodymium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Nd_ppm_ES Number Double Neodymium, in parts per million, by direct-current arc emission spectrography. Nd_ppm_MS Number Double Neodymium, in parts per million, by inductively coupled plasma-mass spectroscopy. Nd_ppm_NA Number Double Neodymium, in parts per million, by neutron activation. Nd_ppm_XRF Number Double Neodymium, in parts per million, by X-ray fluorescence spectroscopy. Ni_ppm_AA Number Double Nickel, in parts per million, by atomic absorption spectrophotometry. Ni_ppm_AES Number Double Nickel, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ni_ppm_ES Number Double Nickel, in parts per million, by direct-current arc emission spectrography. Ni_ppm_MS Number Double Nickel, in parts per million, by inductively coupled plasma-mass spectroscopy. Ni_ppm_XRF Number Double Nickel, in parts per million, by X-ray fluorescence spectroscopy. NO3_ppm_IC Number Double Nitrate, in parts per million, by ion chromatography. P_pct_AES Number Double Phosphorus, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. P_pct_CM Number Double Phosphorus, in weight percent, by colorimetry. P_pct_ES Number Double Phosphorus, in weight percent, by direct-current arc emission spectrography. P_pct_MS Number Double Phosphorus, in weight percent, by inductively coupled plasma-mass spectroscopy. P_pct_XRF Number Double Phosphorus, in weight percent, by X-ray fluorescence spectroscopy. Pb_ppm_AA Number Double Lead, in parts per million, by atomic absorption spectrophotometry. Pb_ppm_AES Number Double Lead, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Pb_ppm_AES/P Number Double Lead, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Pb_ppm_ES Number Double Lead, in parts per million, by direct-current arc emission spectrography. Pb_ppm_MS Number Double Lead, in parts per million, by inductively coupled plasma-mass spectroscopy. Pb_ppm_XRF Number Double Lead, in parts per million, by X-ray fluorescence spectroscopy. Pd_ppm_ES Number Double Palladium, in parts per million, by direct-current arc emission spectrography. Pd_ppm_FA Number Double Palladium, in parts per million, by fire assay. pH_SI_ISE Number Double pH, in standard units, by electrode. PO4_ppm_IC/P Number Double Phosphate, in parts per million, by ion chromatography after partial digestion. Pr_ppm_ES Number Double Praseodymium, in parts per million, by direct-current arc emission spectrography. Pr_ppm_MS Number Double Praseodymium, in parts per million, by inductively coupled plasma-mass spectroscopy. Pt_ppm_ES Number Double Platinum, in parts per million, by direct-current arc emission spectrography. Pt_ppm_FA Number Double Platinum, in parts per million, by fire assay. Rb_ppm_AA Number Double Rubidium, in parts per million, by atomic absorption spectrophotometry. Rb_ppm_MS Number Double Rubidium, in parts per million, by inductively coupled plasma-mass spectroscopy. Rb_ppm_NA Number Double Rubidium, in parts per million, by neutron activation. Rb_ppm_XRF Number Double Rubidium, in parts per million, by X-ray fluorescence spectroscopy. Re_ppm_ES Number Double Rhenium, in parts per million, by direct-current arc emission spectrography. Re_ppm_MS Number Double Rhenium, in parts per million, by inductively coupled plasma-mass spectroscopy. Rh_ppm_FA Number Double Rhodium, in parts per million, by fire assay. S_pct_AES Number Double Total sulfur, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. S_pct_CB Number Double Total sulfur, in weight percent, by combustion. S_pct_CM Number Double Total sulfur, in weight percent, by colorimetry. S_pct_XRF Number Double Total sulfur, in weight percent, by X-ray fluorescence spectroscopy. S_ppm_IC Number Double Total sulfur, in parts per million, by ion chromatography. S_ppm_IC/P Number Double Total sulfur, in parts per million, by ion chromatography after partial digestion. Sb_ppm_AA Number Double Antimony, in parts per million, by atomic absorption spectrophotometry. Sb_ppm_AA/P Number Double Antimony, in parts per million, by atomic absorption spectrophotometry after partial digestion. Sb_ppm_AES/P Number Double Antimony, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Sb_ppm_ES Number Double Antimony, in parts per million, by direct-current arc emission spectrography. Sb_ppm_MS Number Double Antimony, in parts per million, by inductively coupled plasma-mass spectroscopy. Sb_ppm_NA Number Double Antimony, in parts per million, by neutron activation. Sb_ppm_XRF Number Double Antimony, in parts per million, by X-ray fluorescence spectroscopy. Sc_ppm_AES Number Double Scandium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Sc_ppm_ES Number Double Scandium, in parts per million, by direct-current arc emission spectrography. Sc_ppm_MS Number Double Scandium, in parts per million, by inductively coupled plasma-mass spectroscopy. Sc_ppm_NA Number Double Scandium, in parts per million, by neutron activation. Se_ppm_AA Number Double Selenium, in parts per million, by atomic absorption spectrophotometry. Se_ppm_ES Number Double Selenium, in parts per million, by direct-current arc emission spectrography. Se_ppm_FL Number Double Selenium, in parts per million, by fluorometry. Se_ppm_MS Number Double Selenium, in parts per million, by inductively coupled plasma-mass spectroscopy. Se_ppm_XRF Number Double Selenium, in parts per million, by X-ray fluorescence spectroscopy. Si_pct_AES Number Double Silicon, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Si_pct_CM Number Double Silicon, in weight percent, by colorimetry. Si_pct_ES Number Double Silicon, in weight percent, by direct-current arc emission spectrography. Si_pct_XRF Number Double Silicon, in weight percent, by X-ray fluorescence spectroscopy. Sm_ppm_ES Number Double Samarium, in parts per million, by direct-current arc emission spectrography. Sm_ppm_MS Number Double Samarium, in parts per million, by inductively coupled plasma-mass spectroscopy. Sm_ppm_NA Number Double Samarium, in parts per million, by neutron activation. Sn_ppm_AA Number Double Tin, in parts per million, by atomic absorption spectrophotometry. Sn_ppm_AES Number Double Tin, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Sn_ppm_ES Number Double Tin, in parts per million, by direct-current arc emission spectrography. Sn_ppm_MS Number Double Tin, in parts per million, by inductively coupled plasma-mass spectroscopy. Sn_ppm_XRF Number Double Tin, in parts per million, by X-ray fluorescence spectroscopy. SplWt-Au_g_GV Number Double Sample weight, for gold analysis, in grams, by gravimetry. Sr_ppm_AES Number Double Strontium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Sr_ppm_ES Number Double Strontium, in parts per million, by direct-current arc emission spectrography. Sr_ppm_MS Number Double Strontium, in parts per million, by inductively coupled plasma-mass spectroscopy. Sr_ppm_NA Number Double Strontium, in parts per million, by neutron activation. Sr_ppm_XRF Number Double Strontium, in parts per million, by X-ray fluorescence spectroscopy. Ta_ppm_AES Number Double Tantalum, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Ta_ppm_ES Number Double Tantalum, in parts per million, by direct-current arc emission spectrography. Ta_ppm_NA Number Double Tantalum, in parts per million, by neutron activation. Tb_ppm_ES Number Double Terbium, in parts per million, by direct-current arc emission spectrography. Tb_ppm_MS Number Double Terbium, in parts per million, by inductively coupled plasma-mass spectroscopy. Tb_ppm_NA Number Double Terbium, in parts per million, by neutron activation. Te_ppm_AA Number Double Tellurium, in parts per million, by atomic absorption spectrophotometry. Te_ppm_ES Number Double Tellurium, in parts per million, by direct-current arc emission spectrography. Te_ppm_MS Number Double Tellurium, in parts per million, by inductively coupled plasma-mass spectroscopy. Th_ppm_AES Number Double Thorium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Th_ppm_CM Number Double Thorium, parts per million, by colorimetry. Th_ppm_ES Number Double Thorium, in parts per million, by direct-current arc emission spectrography. Th_ppm_MS Number Double Thorium, in parts per million, by inductively coupled plasma-mass spectroscopy. Th_ppm_NA Number Double Thorium, in parts per million, by neutron activation. Th_ppm_XRF Number Double Thorium, in parts per million, by X-ray fluorescence spectroscopy. Th-CV_pct_NA Number Double Thorium, coefficient of variance, in weight percent, by neutron activation. Ti_pct_AES Number Double Titanium, in weight percent, by inductively coupled plasma-atomic emission spectroscopy. Ti_pct_CM Number Double Titanium, in weight percent, by colorimetry. Ti_pct_ES Number Double Titanium, in weight percent, by direct-current arc emission spectrography. Ti_pct_MS Number Double Titanium, in weight percent, by inductively coupled plasma-mass spectroscopy. Ti_pct_XRF Number Double Titanium, in weight percent, by X-ray fluorescence spectroscopy. Tl_ppm_ES Number Double Thallium, in parts per million, by direct-current arc emission spectrography. Tl_ppm_MS Number Double Thallium, in parts per million, by inductively coupled plasma-mass spectroscopy. Tm_ppm_ES Number Double Thulium, in parts per million, by direct-current arc emission spectrography. Tm_ppm_MS Number Double Thulium, in parts per million, by inductively coupled plasma-mass spectroscopy. Tm_ppm_NA Number Double Thulium, in parts per million, by neutron activation. U_ppm_AES Number Double Uranium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. U_ppm_ES Number Double Uranium, in parts per million, by direct-current arc emission spectrography. U_ppm_FL Number Double Uranium, in parts per million, by fluorometry. U_ppm_MS Number Double Uranium, in parts per million, by inductively coupled plasma-mass spectroscopy. U_ppm_NA Number Double Uranium, in parts per million, by neutron activation. U_ppm_XRF Number Double Uranium, in parts per million, by X-ray fluorescence spectroscopy. U-CV_pct_NA Number Double Uranium, coefficient of variance, in weight percent, by neutron activation. U-eq_ppm_GRC Number Double Uranium, equvalent, in parts per million, by gamma ray count. V_ppm_AES Number Double Vanadium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. V_ppm_ES Number Double Vanadium, in parts per million, by direct-current arc emission spectrography. V_ppm_MS Number Double Vanadium, in parts per million, by inductively coupled plasma-mass spectroscopy. V_ppm_XRF Number Double Vanadium, in parts per million, by X-ray fluorescence spectroscopy. W_ppm_CM Number Double Tungsten, parts per million, by colorimetry. W_ppm_CM/P Number Double Tungsten, parts per million, by colorimetry after partial digestion. W_ppm_ES Number Double Tungsten, in parts per million, by direct-current arc emission spectrography. W_ppm_MS Number Double Tungsten, in parts per million, by inductively coupled plasma-mass spectroscopy. W_ppm_NA Number Double Tungsten, in parts per million, by neutron activation. W_ppm_XRF Number Double Tungsten, in parts per million, by X-ray fluorescence spectroscopy. Y_ppm_AES Number Double Yttrium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Y_ppm_ES Number Double Yttrium, in parts per million, by direct-current arc emission spectrography. Y_ppm_MS Number Double Yttrium, in parts per million, by inductively coupled plasma-mass spectroscopy. Y_ppm_XRF Number Double Yttrium, in parts per million, by X-ray fluorescence spectroscopy. Yb_ppm_AES Number Double Ytterbium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Yb_ppm_ES Number Double Ytterbium, in parts per million, by direct-current arc emission spectrography. Yb_ppm_MS Number Double Ytterbium, in parts per million, by inductively coupled plasma-mass spectroscopy. Yb_ppm_NA Number Double Ytterbium, in parts per million, by neutron activation. Zn_ppm_AA Number Double Zinc, in parts per million, by atomic absorption spectrophotometry. Zn_ppm_AA/P Number Double Zinc, in parts per million, by atomic absorption spectrophotometry after partial digestion. Zn_ppm_AES Number Double Zinc, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Zn_ppm_AES/P Number Double Zinc, in parts per million, by inductively coupled plasma-atomic emission spectroscopy after partial digestion or acid leach. Zn_ppm_ES Number Double Zinc, in parts per million, by direct-current arc emission spectrography. Zn_ppm_MS Number Double Zinc, in parts per million, by inductively coupled plasma-mass spectroscopy. Zn_ppm_XRF Number Double Zinc, in parts per million, by X-ray fluorescence spectroscopy. Zr_ppm_AES Number Double Zirconium, in parts per million, by inductively coupled plasma-atomic emission spectroscopy. Zr_ppm_ES Number Double Zirconium, in parts per million, by direct-current arc emission spectrography. Zr_ppm_NA Number Double Zirconium, in parts per million, by neutron activation. Zr_ppm_XRF Number Double Zirconium, in parts per million, by X-ray fluorescence spectroscopy.

    Entity_and_Attribute_Detail_Citation:
    database designer/metadata author Matthew Granitto; see Data_Quality_Information/Lineage/Process_Step/Process_Contact/Contact_Information.
    Entity_and_Attribute_Overview:
    The table FieldNameDictionary is a table of field name descriptions for all tables in the CCAP database.

    FIELD_NAME FIELD_TYPE FIELD_SIZE FIELD_DESC FIELD_NAME Text 35 Field name populated in one or more tables of the CCAP database. FIELD_TYPE Text 15 Data type of field. FIELD_SIZE Text 15 Maximum number of characters that can be entered in field. FIELD_DESC Text 255 Description of field. FIELD_TABLES Text Memo Table(s) containing field.

    Entity_and_Attribute_Detail_Citation:
    database designer/metadata author Matthew Granitto; see Data_Quality_Information/Lineage/Process_Step/Process_Contact/Contact_Information.
    Entity_and_Attribute_Overview:
    The table Geol_Data is a table of spatial, geologic and descriptive attributes for samples whose chemical data was compiled for CCAP.

    FIELD_NAME FIELD_TYPE FIELD_SIZE FIELD_DESC JOB_ID Number Double Laboratory batch identifier assigned by the Sample Control Officer of the analytical laboratory that received the samples as a batch. LAB_ID Number Double Unique identifier assigned to each submitted sample by the Sample Control Officer of the analytical laboratory that received the sample. FIELD_ID Number Double Field identifier assigned by the sample collector of sample submitted for analysis, possibly corrected by data renovator due to truncation of data entry. SUBMITTER Text 75 Name of the individual(s) who submitted the sample in a batch to the laboratory for analysis; not necessarily the sample collector. PROJECT_NAME Text 75 Project name, at times derived from a project account number, of work group funded for the collection and analysis of submitted samples. DATE_SUBMITTED Date/Time n/a Date sample was submitted to Sample Control for initial database processing prior to sample prep and analysis. STATE Text 2 Abbreviation of state from where the sample was collected. LATITUDE Number Decimal Latitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 LONGITUDE Number Decimal Longitude coordinate of sample site, reported in decimal degrees; usually with NAD27 datum and Clarke 1866 spheroid prior to year 2000 SPHEROID Text 25 Reference spheroid or ellipsoid, when recorded, for the latitude and longitude coordinates of the sample site. DATUM Text 50 Reference datum, when recorded, for the latitude and longitude coordinates of the sample site. DEPTH Text 65 Depth from the surface at which the sample was collected; units are specified by the submitter. LOCATE_DESC Text 255 Geographic information relating to the location of the sample site. DATE_COLLECT Date/Time n/a Date the sample was collected, when recorded. SAMPLE_SOURCE Text 40 Physical setting or environment from which the sample was collected. METHOD_COLLECTED Text 15 Sample collection method: Single grab, composite, or channel. PRIMARY_CLASS Text 30 Primary classification of sample media. SECONDARY_CLASS Text 33 Secondary classification or subclass of sample media; attribute of PRIMARY_CLASS. SPECIFIC_NAME Text 40 A specific name for the sample media collected; attribute of PRIMARY_CLASS and/or SECONDARY_CLASS. SAMPLE_COMMENT Text 255 Attribute used to modify PRIMARY_CLASS, SECONDARY_CLASS, or SPECIFIC_NAME; data is not derived from sample codes. ADDL_ATTR Text 255 Additional attributes used to modify PRIMARY_CLASS, SECONDARY_CLASS, or SPECIFIC_NAME; derived from sample codes in fields of original databases that do not have equivalent fields in the NGDB. GEOLOGIC_AGE Text 60 Age or range of ages from the Geological Time Scale for the collected sample. STRATIGRAPHY Text 255 Name of the stratigraphic unit from which the sample was collected; when present, values are as given by the sample submitter and may represent either a formal name, an informal name, or geologic map unit abbreviation. MINERALIZATION Text 35 An indication of mineralization or mineralization types as provided by the sample submitter. ALTERATION Text 50 An indication of the presence or type of alteration noted in the sample by the submitter. STRUCT_SAMPLE_SRC Text 30 An indication of the igneous setting from which the sample was collected. DEPOSIT_ENVIRON Text 20 Original environment of deposition for sedimentary rocks. METAMORPHISM Text 15 An indication of the type of metamorphic setting from which the rock was collected. FACIES_GRADE Text 35 Metamorphic facies or grade as provided by the sample submitter. SOURCE_ROCK Text 12 Used in the rock database to identify the precursor rock, igneous or sedimentary, for metamorphic rocks. SAMPLE_ZONE Text 20 Soil horizon from which sample was collected. HORIZON Text 20 Definition of soil sample horizon from which sample was collected. SALINE Text 12 Saline nature of soil from which sample was collected. ORGANICS Text 20 Organic content of soil from which sample was collected. FERRITIC Text 13 Ferritic nature of soil from which sample was collected. DRAINAGE Text 15 Description of drainage of soil where sample collected. PREP Text 255 Description of the sample preparation methods used. MESH_PORE_SIZE Text 40 Sieve size used in field sampling or laboratory preparation to fractionate the sample. QUAD Text 30 Name of 1:250,000-scale quadrangle (1°x2°) in which sample was collected. PREVIOUS_JOB_ID Text 20 Original NGDB batch number (JOB_ID) of a USGS resubmitted sample that has been given a new batch number upon resubmittal for further analysis. PREVIOUS_LAB_ID Text 20 Original NGDB LAB_ID of a USGS resubmitted sample that has been given a new lab number upon resubmittal for further analysis.

    Entity_and_Attribute_Detail_Citation:
    database designer/metadata author Matthew Granitto; see Data_Quality_Information/Lineage/Process_Step/Process_Contact/Contact_Information.


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    Matthew Granitto

  3. To whom should users address questions about the data?

    Matthew Granitto
    U.S. Geological Survey
    Box 25046, Denver Federal Center, MS 973
    Denver, Colorado 80225
    United States of America

    1-303-236-1412 (voice)
    1-303-236-3200 (FAX)
    granitto@usgs.gov


Why was the data set created?

This database was initiated, designed, and populated to collect and integrate geochemical data from central Colorado in order to facilitate geologic mapping, petrologic studies, mineral resource assessment, defining geochemical baseline values and statistics, environmental impact assessment, and medical geology.


How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

    Date: 2007 (process 1 of 1)
    Most of the data were generated by the Geologic Discipline analytical laboratories of the U.S. Geological Survey, beginning in the early 1960s. A small portion of these data predate this larger dataset and were never entered in any databases. Upon completion of the chemical analysis, the data were stored in the RASS database (1963 to 1987), the PLUTO database (1979 to 1997), or the specific commercial laboratory-information-management software (LIMS) used by the USGS analytical laboratories (1996 to present). Data from all three sources were combined, reformatted, and standardized into the Oracle-based National Geochemical Database (NGDB). In addition, a significant dataset was extracted from the National Uranium Resource Evaluation database.

    To create this data set, geologic material sample data were retrieved from the NGDB using the following criteria: 1) Each sample must have a valid and unique lab number; 2) Each sample must have latitude and longitude coordinates; and 3) Each sample must be identified as a rock, a sediment, a soil, or a heavy-mineral concentrate. This data set was then examined to remove any samples that could be identified as a processed derivative of a rock, except for concentrates. This included single minerals, mineral separates, rock coatings, insoluble residues, partial digestions, leachates, experimental or artificial samples, and some misidentified samples. An effort was made to fix incorrect or incomplete attributes. Several standardized sample descriptive fields were more completely populated using information previously found only in comment fields. The rock sample location and descriptive data were repackaged into a single table called Geol_Data.

    Analytical data associated with these rock samples were retrieved from the NGDB using the following criteria: 1) Each analytical determination must be linked to a valid and unique rock sample lab number; and 2) Each analytical determination must be identified by analyte. This data set was then examined to remove determinations that were requested but not completed, determinations that could not be quantified due to instrumental interferences, and duplicate determinations. In addition, multiple variations of similar analytical methods were consolidated into a single method name by element. For example: data for 17 variations of emission spectrographic determination for zinc were all combined into a single field called Zn_ppm_ES. These data were repackaged into a single table called Chem_Data. The analytical data were again repackaged into 9 tables based upon media type and the consolidated analytical methods: Chem_HMC, Chem_Rx_Majors, Chem_Rx_Traces_Ag-Gd, Chem_Rx_Traces_Ge-Sb, Chem_Rx_Traces_Sc-Zr, Chem_Sed_Ag-Mg, Chem_Sed_Mn-Zr, Chem_Soil_Ag-Mg, and Chem_Soil_Mn-Zr.

    Person who carried out this activity:

    Matthew Granitto
    U.S. Geological Survey
    Box 25046, Denver Federal Center, MS 973
    Denver, Colorado 80225
    United States of America

    1-303-236-1412 (voice)
    1-303-236-3200 (FAX)
    granitto@usgs.gov

  3. What similar or related data should the user be aware of?

    U.S. Geological Survey (USGS), 2010, Central Colorado Assessment Project (CCAP): Geochemical Data for Rock, Sediment, Soil and Concentrate Sample Media: U.S. Geological Survey Data Series XXX, U.S. Geological Survey, Denver, CO.


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    The data of this dataset represent analyses of geologic material samples collected in support of various USGS programs. In addition, geochemical data from geologic material samples collected and analyzed under the Atomic Energy Commission (AEC) National Uranium Resource Evaluation Hydrogeochemical and Stream Sediment Reconnaissance Program has been included in this database. The historical geochemical databases of the Geologic Discipline in the USGS were created with the intent of storing data predominately for regional projects. The new combined National Geochemical Database is an agglomerate of data from projects that had differing analytical needs and that ranged in scale from studies of an outcrop to reconnaissance surveys of an entire state or country. Initially, the intended user of the data was the original submitter or associated project personnel, and the primary means of publicly releasing data were hardcopy USGS reports, as well as professional journals. Within this paradigm, some decisions were made which have affected the completeness and accuracy of the attributes within the database.

    1) Coordinates: When samples were brought in for analysis, the submitter was required to include information about the sample for the database; descriptions, geocoding, and latitude-longitude coordinates. In the days before map digitizing boards and GPS units were common, the determination of coordinates from field sheets was a time consuming and error prone process. In order to facilitate the analysis of samples, a decision was made to allow submitters to enter the coordinates for the lower right (southeast) corner of the submitter's working field map on which the samples could be plotted, which was most commonly a 7.5' or 15' quadrangle map. In theory, the precise coordinates for these samples would be determined and added to the database at a later date. In practice, most of these precise coordinates were used in the USGS Open-File data releases but were never entered back into the PLUTO database. Therefore, the precision of coordinates in the PLUTO database varies from "good to the nearest second of latitude or longitude" to "good to the nearest 15 minutes of latitude or longitude".

    2) Geocoding: The submission of sample descriptive information (geocoding) with samples was mandatory for some fields and optional for others. Therefore, the completeness of geocoding can vary. In addition, most geocodes were not checked for completeness, accuracy, or validity during data entry into the early databases. Therefore the database contains some incorrect and invalid codes.

    3) Analytical Data: The samples in this data set were chemically analyzed by a variety of techniques over a period of time from the early 1900's to the present. The accuracy of the data varies with the analytical methodology and with the concentration of the element being analyzed.

    4) Qualifiers: A qualifier such as "N" (less than the detection limit of the analytical method) or "G" (greater than the upper determination limit of the analytical method) accompanies some analytical data values. These qualifiers are defined as follows:

    L = the element was detected by the technique but at a level below the lower limit of determination for the method. The value of the lower limit of determination is given in the adjacent data field.

    G or > = the element was measured at a concentration greater than the upper determination limit for the method. The upper limit of determination is given in the adjacent data field.

    N = the element was not detected at concentrations above the lower limit of determination for the method. The value of the lower limit of determination is given in the adjacent data field.

    < = the element concentration was determined to be less than the lower determination limit for the method for this element. The value of the lower limit of determination is given in the adjacent data field.

  2. How accurate are the geographic locations?

    1) Coordinates: Most of the more recently submitted samples were located using GPS receivers. The locations determined by GPS should be accurate to the nearest latitude or longitude second. Older sample locations were determined primarily from USGS topographic maps of various scales. Sometimes these coordinates were determined directly from the original maps using a digitizing board. In other cases, a clear overlay with a coordinate grid was used to visually estimate the sample position on the map. The positional accuracy is dependant on the scale of the map from which the determination was made as well as the care taken by the individual(s) who plotted the sample or who made the coordinate determination. Unfortunately, some location coordinates were not carefully determined. The determination of coordinates from field sheets was a time consuming and error prone process. In order to facilitate the analysis of samples, a decision was made to allow samples to be submitted to the laboratory using only the coordinates for the lower right (southeast) corner of the submitter's working field map on which the samples could be plotted, which was most commonly a 7.5' or 15' quadrangle map. In theory, the precise coordinates for these samples would be determined and added to the database at a later date. In practice, most of these more precise coordinates were used in resultant USGS Open-File data releases or publications but were never entered back into the database.

    When submitters reported locations as degrees, minutes, and seconds of latitude and longitude the accuracy should be within a few seconds. When submitters only reported locations as degrees and minutes the accuracy is only to the nearest minute. When submitters only reported the corner coordinates of their field map, the accuracy is only to the nearest 7.5 or 15 minutes.

    2) Datum and Earth Ellipsoid or Spheroid: When coordinates were submitted from GPS receivers or when the source of the coordinates were known, the datum and spheroid are identified in two fields that accompany the locational coordinates. For the majority of the data, these fields are empty. Since most of the older coordinate data in the database were determined from published maps, the best assumption is that the appropriate datum and spheroid is the one most conmmonly used for those types of maps. In the United States, most field maps were USGS topographic maps that used NAD27 (1927 North American datum) based on the Clarke 1866 ellipsoid. Using the wrong ellipsoid or datum may result in a location that is offset by up to a couple hundred feet.

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    This data set provides chemical data for Ag, Al, As, Au, B, Ba, Be, Bi, Br, Ca, Cd, Ce, Cl, Co, Cr, Cs, Cu, Dy, Er, Eu, Ga, Gd, Ge, F, Fe, Hf, Hg, Ho, I, In, Ir, K, La, Li, Lu, Mg, Mn, Mo, Na, Nb, Nd, Ni, Os, P, Pb, Pd, Pr, Pt, Rb, Re, Rh, Rn, Ru, S, Sb, Sc, Se, Si, Sm, Sn, Sr, Ta, Tb, Te, Th, Ti, Tl, Tm, U, V, W, Y, Yb, Zn, Zr, forms of carbon, forms of sulfur, forms of water, conductance, pH, density, and loss on ignition. In addition, the data set provides location and descriptive information for each sample. Not all the descriptive fields contain information for a particular sample because it was not recorded by the submitter or because it was never entered into the database. No sample will contain analyses for all possible elements. The analytical methods used were selected by the sample submitter based on the goals of the individual project and will vary throughout the data set. The analytical methods, sample preparation protocols, and quality control protocols used for various sample media by the USGS are documented in the following publications:

    Adrian, Betty M., Arbogast, Belinda F., Detra, David E., and Mays, Robert E., 1996, Direct-current arc emission spectrographic method for semiquantitative analysis of geologic materials, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 130-143, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Allcott, Glenn H., and Lakin, Hubert W., 1974, Statistical summary of geochemical data furnished by 85 laboratories for for six geochemical exploration reference samples: U.S. Geological Survey open-file report 74-1003, 103 p.; 29 cm.

    Allcott, Glenn H., and Lakin, Hubert W., 1978, Tabulation of geochemical data furnished by 109 laboratories for six geochemical exploration reference samples: U.S. Geological Survey open-file report 78-163, iiv, 199 leaves; 28 cm.

    Alminas, Henry V., and Marceau, T. L., 1982, Construction plans and operating instructions for a laboratory- scale magnetohydrostatic (MHS) mineral separator: U.S. Geological Survey open-file report 82-895, 2 sheets: plans; 92 x 120 cm, folded in envelope 25 x 32 cm.

    Alminas, Henry V., and Mosier, Elwin L., 1976, Oxalic-acid leaching of rock, soil, and stream-sediment samples as an anomaly-accentuation technique: U.S. Geological Survey open-file report 76-275, 25 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr76275#>.

    Alminas, Henry V., and VanTrump, George, Jr., 1978, RFM (relative fraction magnitude) : program explanation and computer program listing: U.S. Geological Survey open-file report 78-1013, 23 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr781013#>.

    Alminas, Henry V., et al, 1984, A Laboratory-scale magnetohydrostatic separator and its applications to mineralogic problems: U.S. Geological Survey bulletin 1541, iii, 21 p.: ill., maps; 23 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1541#>.

    Almond, Hy, 1952, A field method for the determination of traces of cobalt in soils: U.S. Geological Survey open-file report 139, 6 leaves; 27 cm.

    Almond, Hy, 1955, Rapid field and laboratory method for the determination of copper in soil and rock: U.S. Geological Survey bulletin 1036-A; in "Contributions to Geochemistry", p. A1-A8, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1036A#>.

    Almond, Hy, and Bloom, Harold, 1951, A semimicro method for the determination of cobalt in soils and rocks : a field test using the chromograph: U.S. Geological Survey circular 125, 6 p.: illus.; 26 cm.

    Almond, Hy, Crowe, Harry E., and Thompson, Charles E., 1955, Rapid determination of germanium in coal, soil and rock: U.S. Geological Survey bulletin 1036-B; in "Contributions to Geochemistry", p. iii, 9-17: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1036B#>.

    Annell, Charles S., 1956, Controlled atmospheres for spectrochemical analysis: U.S. Geological Survey trace elements investigations report 653, 28 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei653#>.

    Annell, Charles S., 1964, A spectrographic method for the determination of cesium, rubidium and lithium in tektites: U.S. Geological Survey professional paper 501-B; in "Geological Survey Research 1964", p. B148-B151.

    Annell, Charles S., 1967, Spectrographic determination of volatile elements in silicates and carbonates of geologic interest using an argon d-c arc: U.S. Geological Survey professional paper 575-C; in "Geological Survey Research 1967", p. C132-C136.

    Annell, Charles S., and Helz, Armin W., 1960, Spectrochemical analysis using controlled atmospheres with a simple gas jet: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B497-B499.

    Annell, Charles S., and Helz, Armin W., 1961, A constant-feed direct-current arc: U.S. Geological Survey bulletin 1084-J; in "Contributions to Geochemistry", p. iv, 231-251: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1084J#>.

    Antweiler, John C., 1961, Methods for decomposing samples of silicate rock fragments: U.S. Geological Survey professional paper 424-B; in "Geological Survey Research 1961", p. B322-B324.

    Antweiler, Ronald C., Patton, Charles J., and Taylor, Howard E., 1996, Automated, colorimetric methods for determination of nitrate plus nitrite, nitrite, ammonium and orthophosphate ions in natural water samples: U.S. Geological Survey open-file report 93-638, iv, 23 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr93638#>.

    Arbogast, Belinda F., 1990, Quality assurance manual for the Branch of Geochemistry, U.S. Geological Survey: U.S. Geological Survey open-file report 90-668, 184 p. (some folded): ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr90668#>.

    Arbogast, Belinda F., Detra, David E., and VanTrump, George, Jr., 1987, Statistical summary of geochemical data furnished by 146 laboratories for six geochemical exploration reference samples: U.S. Geological Survey open-file report 87-436, 136 p.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr90668#>.

    Arbogast, Belinda F., editor, 1996, Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, xi, 248 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Aruscavage, Philip J., 1977, Determination of arsenic, antimony, and selenium in coal by atomic absorption spectrometry with a graphite tube analyzer: U.S. Geological Survey Journal of Research, vol 5, no 4, p. 405-408.

    Aruscavage, Philip J., 1979, The determination of lead in 13 USGS standard rocks: Talanta, vol 26, 1052-1054.

    Aruscavage, Philip J., 1979, The determination of silver in silicate rocks by electrothermal atomic absorption spectrometry: Analytica Chimica Acta, vol 109, 171-175.

    Aruscavage, Philip J., 1996, Choride by ion-selective electrode following KMnO4-H2SO4-HF dissolution, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 191-194, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Aruscavage, Philip J., and Campbell, E.Y., 1978, Spectrophotometric determination of tungsten in rocks using zinc dithiol: U.S. Geological Survey Journal of Research, vol 6, p. 697-699.

    Aruscavage, Philip J., and Campbell, E.Y., 1981, Molybdenum content of 16 US Geological Survey standard rocks: Geostandards Newsletter, vol 5, 171-173.

    Aruscavage, Philip J., and Campbell, E.Y., 1983, An ion-selective electrode method for the determination of chlorine in geological materials: Talanta, vol 30, 745-749.

    Aruscavage, Philip J., and Crock, James G, 1987, Atomic absorption methods, in Methods for geochemical analysis: U.S. Geological Survey bulletin 1770-C, C1-C6.

    Aruscavage, Philip J., and Hakim, Adel O., 1992, DGMR/USGS chemistry laboratory analytical procedures, 1991: U.S. Geological Survey interagency report 845. Technical report (Saudia Arabia. Deputy Ministry for Mineral Resources), 1 v. (various pagings): ill.; 28 cm.

    Ashby, George E., and Kellagher, Richard C., 1957, An apparatus for the study of thermoluminescence from minerals: U.S. Geological Survey trace elements investigations report 691, 23 leaves; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei691#>.

    Baedecker, Mary Jo., and Friedman, Linda C., 2000, The U.S. Geological Survey National Research Program in the hydrologic sciences: U.S. Geological Survey circular 1195, v, 26 p.: col. ill., col. maps; 28 cm, accessed November 2, 2009 at #<https://pubs.usgs.gov/circ/circ1195/#>.

    Baedecker, Philip A., and Grossman, Jeffrey N., 1989, The computer analysis of high resolution gamma-ray spectra from instrumental activation analysis experiments: U.S. Geological Survey open-file report 89-454, 1 v. (various pagings): ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr89454#>.

    Baedecker, Philip A., and Grossman, Jeffrey N., 1994, The SPECTRA program library : a PC based system for gamma-ray spectra analysis and INAA data reduction: U.S. Geological Survey open-file report 94-168, 1 v. (various pagings): ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr94168#>.

    Baedecker, Philip A., and McKown, David M., 1987, Instrumental neutron activation analysis of geochemical samples, in Methods for geochemical analysis: U.S. Geological Survey bulletin 1770-H, H1-H14.

    Baedecker, Philip A., editor, 1987, Methods for geochemical analysis: U.S. Geological Survey bulletin 1770, 1 v.: ill.; 28 cm.

    Baedecker, Philip A., Grossman, Jeffrey N., and Buttleman, Kim, 1998, National geochemical data base, PLUTO geochemical data base for the United States: U.S. Geological Survey digital data series DDS-47, 1 computer laser optical disc; 4 3/4 in, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ds/ds47#>.

    Barker, Franklin B., and Johnson, Jesse O., 1964, Determination of radium in water: U.S. Geological Survey water supply paper 1696-B; in "Radiochemical Analysis of Water", iii, 29 p.: ill.; 23 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1696B#>.

    Barker, Franklin B., and Robinson, B.P., 1963, Determination of beta activity in water: U.S. Geological Survey water supply paper 1696-A; in "Radiochemical Analysis of Water", iii, 32 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1696A#>.

    Barker, Franklin B., et al, 1965, Determination of uranium in natural waters: U.S. Geological Survey water supply paper 1696-C; in "Radiochemical Analysis of Water", iii, 25 p.: ill.; 23 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1696C#>.

    Barnett, Paul R. and Mallory, E. C., 1971, Determination of minor elements in water by emission spectroscopy: U.S. Geological Survey Techniques of Water-Resource Investigation, v, 31 p. :ill. ;26 cm., accessed November 2, 2009 at <https://pubs.usgs.gov/twri/twri5a2/>.

    Barnett, Paul R., 1961, An evaluation of whole-order, 1/2-order, and 1/3-order reporting in semiquantitative spectrochemical analysis: U.S. Geological Survey bulletin 1084-H; in "Contributions to Geochemistry", p. iii, 183-206: graphs; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1084H#>.

    Barnett, Paul R., Huleatt, William P., Rader, Lewis F., Jr., and Myers, Alfred. T., 1954, Spectrographic determination of contamination of rock samples after grinding with alumina ceramic: U.S. Geological Survey trace elements investigations report 417, 6 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei417#>.

    Barnett, Paul R., Skinner, Dwight L., and Huffman, Claude, Jr., 1968, Determination of gold, platinum, and palladium by a combined fire-assay, ion-exchange and spectrochemical technique: U.S. Geological Survey professional paper 600-C; in "Geological Survey Research 1968", p. C161-C163.

    Bastron, Harry, Barnett, Paul R., and Murata, K. Jack, 1960, Method for the quantatative spectrographic analysis of rocks, minerals, ores, and other materials by a powder d-c arc technique: U.S. Geological Survey bulletin 1084-G; in "Contributions to Geochemistry", p. G1-G182, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1084G#>.

    Beetem, W. Arthur, et al, 1981, 1982 Water Quality Laboratory services catalog: U.S. Geological Survey open-file report 81-1016, 1 v. (loose-leaf); 28 cm.

    Beetem, W. Arthur, Janzer, Victor J., and Wahlberg, James S., 1962, Use of cesium-137 in the determination of cation exchange capacity: U.S. Geological Survey bulletin 1140-B; in "Ion Exchange on Mineral Materials", , accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1140B#>.

    Berman, Sol, 1967, The photoelectric determination of lithium: U.S. Geological Survey professional paper 575-B; in "Geological Survey Research 1967", p. B161-B163.

    Bigelow, Robert C., 1982, Interfacing an ARL plasma spectrometer to an HP1000 minicomputer: U.S. Geological Survey open-file report 82-963, 1 v. (various foliations); 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr82963#>.

    Bigelow, Robert C., Vaughn, R. Bruce, and Church, Stanley E.,, 1999, MASSPEC : a PC program to control and to process data from an automated mass-spectrometer: U.S. Geological Survey open-file report 99-161, 34 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr99161#>.

    Bloom, Harold, and Crowe, Harry E., 1954, Determination of readily soluble copper, zinc, and lead in soils and rocks : nitric acid extraction: U.S. Geological Survey open-file report 242, 16-24 leaves: ill.; 27 cm.

    Bragg, Linda J., Oman, Joanne K., Tewalt, Susan J., Oman, Charles L., Rega, Noreen H., Washington, Paula M., and Finkelman, Robert B., 1998, U.S. Geological Survey coal quality (COALQUAL) database: U.S. Geological Survey open-file report 97-134, 1 computer laser optical disc; 4 3/4 in., accessed November 2, 2009 at #<https://pubs.usgs.gov/of/1997/of97-134/#>.

    Brannock, Walter W., et al, 1953, Contributions to geochemistry, 1949: U.S. Geological Survey bulletin 992, v, 94 p.: ill., plates; 23 cm.

    Briggs, Paul H., 1996, Forty elements by inductively coupled plasma-atomic emission spectrometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 77-94, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Briggs, Paul H., 2002, The determination of forty elements in geological and botanical samples by inductively coupled plasma-atomic emission spectrometry, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. G1-G18, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/G01fortyelementICP-AESsolid_M.pdf#>.

    Briggs, Paul H., 2002, The determination of twenty-seven elements in aqueous samples by inductively coupled plasma-atomic emission spectrometry, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. F1-F11, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/F0203ICPAES_M.pdf#>.

    Briggs, Paul H., and Crock, James G., 1986, Automated determination of total selenium in rocks, soils, and plants: U.S. Geological Survey open-file report 86-40, 20 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr8640#>.

    Briggs, Paul H., and Fey, David L., 1996, Twenty-four elements in natural and acid mine waters by inductively coupled plasma-atomic emission spectrometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 95-101, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Briggs, Paul H., and Meier, Allen L., 1999, The determination of forty two elements in geological materials by inductively coupled plasma - mass spectrometry: U.S. Geological Survey open-file report 99-166, 15 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr99166#>.

    Briggs, Paul H., and Meier, Allen L., 2002, The determination of forty-two elements in geological materials by inductively coupled plasma-mass spectrometry for NAWQA, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. J1-J14, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/J22NAWQAMethod_M.pdf#>.

    Briggs, Paul H., and Meier, Allen L., 2002, The determination of forty-two elements in geological materials by inductively coupled plasma-mass spectrometry, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. I1-I14, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/I20NAWQAPlus_M.pdf#>.

    Brinton, Terry I., Antweiler, Ronald C., and Taylor, Howard E., 1996, Method for the determination of dissolved chloride, nitrate, and sulfate in natural water using ion chromatography: U.S. Geological Survey open-file report 95-426A, iii, 16 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr95426A#>.

    Brookes, Anne E., Leary, J.J., and Golightly, Danold W., 1981, Selection of operating conditions for multiple-element analysis by inductively coupled plasma-atomic emission spectrometry : an application of optimization methodology in analytical chemistry: U.S. Geological Survey open-file report 81-1211, iv, 75 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr811211#>.

    Brown, David W., and Hem, John D., 1975, Reactions of aqueous aluminum species at mineral surfaces: U.S. Geological Survey water supply paper 1827-F; in "Chemistry of Aluminum in Natural Water", iv, 48 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1827F#>.

    Brown, David W., and Hem, John D., 1984, Development of a model to predict the adsorption of lead from solution on a natural streambed sediment: U.S. Geological Survey water supply paper 2187, iv, 35 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp2187#>.

    Brown, Eugene, Skougstad, Marvin W., and Fishman, Marvin J., 1970, Methods for collection and analysis of water samples for dissolved minerals and gases: Techniques of water resources investigations of the United States Geological Survey bk. 5, ch. A1, vii, 160 p.: ill.; 26 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/twri/twri05A1#>.

    Brown, Floyd M., Simon, Frederick O., and Greenland, L. Paul, 1975, Spectrophotometric-isotope dilution determination of arsenic in soils and rocks: U.S. Geological Survey Journal of Research, vol 3, no 2, p. 187-190.

    Brown, Glenda E., and McLain, Betty J., 1994, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of antimony by automated-hydride atomic absorption spectrophotometry: U.S. Geological Survey open-file report 93-664, iv, 17 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr93664#>.

    Brown, Zoe Ann, and Curry, Kenneth J., 2002, Total carbon by combustion, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. R1-R4, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/R10TotalCarbon_M.pdf#>.

    Brown, Zoe Ann, and Curry, Kenneth J., 2002, Total sulfur by combustion, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. Q1-Q4, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/Q25TotS_M.pdf#>.

    Brown, Zoe Ann, O'Leary, Richard M., Hageman, Philip L., and Crock, James G., 2002, Mercury in water, geologic, and plant materials by continuous flow-cold vapor-atomic absorption spectrometry, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. M1-M9, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/M12HgCV_M.pdf#>.

    Brown, Zoe Ann, Papp, Clara S.E., Brandt, Elaine L., and Aruscavage, Philip J., 2002, Carbonate carbon by coulometric titration, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. S1-S6, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/S08CarbonateCarbon_S.pdf#>.

    Budahn, James R., and Wandless, Gregory A., 2002, Instrumental neutron activation by abbreviated count, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. Y1-Y9, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/Y15INAA-SHORT_M.pdf#>.

    Budahn, James R., and Wandless, Gregory A., 2002, Instrumental neutron activation by long count, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. X1-X13, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/X14INAALong_M.pdf#>.

    Bullock, John H., Cathcart, James D., and Betterton, William J., 2002, Analytical methods utilized by the United States Geological Survey for the analysis of coal and coal combustion by-products: U.S. Geological Survey open-file report 2002-389, Internet, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-389/#>.

    Bunker, Carl M., and Bush, Charles A., 1966, Uranium, thorium, and radon analyses by gamma-ray spectrometry (0.184-0.352 million electon volts): U.S. Geological Survey professional paper 550-B; in "Geological Survey Research 1966", p. B176-B181.

    Bunker, Carl M., and Bush, Charles A., 1967, A comparison of potassium analyses by gamma-ray spectrometry and other techniques: U.S. Geological Survey professional paper 575-B; in "Geological Survey Research 1967", p. B164-B169.

    Burkhardt, Mark R., et al, 1995, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of methylene blue active substances by spectrophotometry: U.S. Geological Survey open-file report 95-189, iv, 16 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://nwql.usgs.gov/Public/pubs/OFR95-189/OFR95-189.html#>.

    Burkhardt, Mark R., et al, 1997, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory ; determination of nonpurgeable suspended organic carbon by wet-chemical oxidation and infrared spectrometry: U.S. Geological Survey open-file report 97-380, iv, 12 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://nwql.usgs.gov/Public/pubs/OFR97-380/OFR97-380.html#>.

    Bush, Charles A., 1981, Sample preparation and gamma-ray spectrometer operation for determining natural radioelement contents in rocks at the U.S. Geological Survey in Denver, Colorado: U.S. Geological Survey open-file report 81-1308, 22 leaves: ill.; 28 cm.

    Campbell, E.Y., and Aruscavage, Philip J., 1982, Molybdenum and tungsten contents of five CRPG and ANRT geochemical reference materials: Geostandards Newsletter, vol 6, 229-231.

    Campbell, E.Y., and Simon, Frederick O., 1978, Atomic absorption determination of beryllium in geological materials by use of electrothermal atomization: Talanta, vol 25, 251-255.

    Campbell, Wesley L., Mosier, Elwin L., and Antweiler, John C., 1973, Effects of laboratory treatments on silver and other elements in native gold: U.S. Geological Survey Journal of Research, vol 1, no 1, p. 211-220.

    Canney, Frank C., and Nowlan, Gary A., 1964, Determination of ammonium citrate-soluble cobalt in soils and sediments: U.S. Geological Survey open-file report 737, 15 leaves; 28 cm.

    Cannon, Helen L., 1954, Methods of botanical prospecting for uranium deposits on the Colorado Plateau: U.S. Geological Survey trace elements investigations report 422, 103 p.: ill., map; 29 cm.

    Cannon, Helen L., 1957, The development of botanical methods of prospecting for uranium on the Colorado Plateau: U.S. Geological Survey trace elements investigations report 605, 84 p.: ill., maps; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei605#>.

    Cannon, Helen L., 1960, The development of botanical methods of prospecting for uranium on the Colorado Plateau: U.S. Geological Survey bulletin 1085-A; in "Botanical Prospecting for Uranium on the Colorado Plateau", iv, 50 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1085A#>.

    Carron, Maxwell K., Naeser, Charles R., Rose, Harry J., Jr., and Hildebrand, Fred A., 1958, Fractional precipitation of rare earths with phosphoric acid: U.S. Geological Survey bulletin 1036-N; in "Contributions to Geochemistry", p. 253-275, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1036N#>.

    Chaffee, Maurice A., 1970, Determination of acid-soluble and total manganese in geological and botanical materials by atomic absorption: U.S. Geological Survey professional paper 700-D; in "Geological Survey Research 1970", p. D217-D221.

    Chaffee, Maurice A., 1976, Geochemical exploration techniques based on distribution of selected elements in rocks, soils, and plants, Mineral Butte copper deposit, Pinal County, Arizona: U.S. Geological Survey bulletin 1278-D, iv, 55 p.: maps; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1278D#>.

    Chaffee, Maurice A., 1977, Geochemical exploration techniques based on distribution of selected elements in rocks, soils, and plants, Vekol porphyry copper deposit area, Pinal County, Arizona: U.S. Geological Survey bulletin 1278-E, v, 78 p.: ill., maps; 23 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1278E#>.

    Chao, T.T., and Sanzolone, Richard F., 1973, Atomic absorption spectrophotometric determination of microgram levels of Co, Ni, Cu, Pb, and Zn in soil and sediment extracts containing large amounts of Mn and Fe: U.S. Geological Survey Journal of Research, vol 1, no 6, p. 681-685.

    Chao, T.T., and Sanzolone, Richard F., 1977, Chemical dissolution of sufide minerals: U.S. Geological Survey Journal of Research, vol 5, no 4, p. 409-412.

    Chao, T.T., Jenne, Everett A., and Heppting, L.M., 1968, Adsorption of traces of silver on sample containers: U.S. Geological Survey professional paper 600-D; in "Geological Survey Research 1968", p. D13-D15, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp600D#>.

    Chao, T.T., Jenne, Everett A., and Heppting, L.M., 1968, Prevention of adsorption of trace amounts of gold by containers: U.S. Geological Survey professional paper 600-D; in "Geological Survey Research 1968", p. D16-D19, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp600D#>.

    Church, Stanley E., 1981, Multi-element analysis of fifty-four geochemical reference samples using inductively coupled plasma-atomic emission spectrometry: Geostandards Newsletter, vol 5, 133-160.

    Clarke, Frank W., 1884, Report of work done in the Division of Chemistry and Physics mainly during the fiscal year..: U.S. Geological Survey bulletin 27, 8 v.: ill.; 24 cm.

    Clarke, Frank W., 1887, Report of work done in the division of chemistry and physics, mainly during the fiscal year 1885-1886: U.S. Geological Survey bulletin 42, 152 p..

    Clarke, Frank W., 1889, Report of work done in the division of chemistry and physics, mainly during the fiscal year 1886-87: U.S. Geological Survey bulletin 55, 96 p..

    Clarke, Frank W., 1890, A report of work done in the division of chemistry and physics, mainly during the fiscal year 1888-89: U.S. Geological Survey bulletin 64, 60 p..

    Clarke, Frank W., 1890, Report of work done in the division of chemistry and physics, mainly during the fiscal year 1887-88: U.S. Geological Survey bulletin 60, 174 p..

    Clarke, Frank W., 1891, Report of work done in the division of chemistry and physics, mainly during the fiscal year 1889-90: U.S. Geological Survey bulletin 78, 131 p..

    Clarke, Frank W., 1892, Report of work done in the division of chemistry and physics, mainly during the fiscal years 1890-91: U.S. Geological Survey bulletin 90, 77 p..

    Clarke, Frank W., 1893, Report of work done in the division of chemistry during the fiscal years 1891-92 and 1892-93: U.S. Geological Survey bulletin 113, 115 p..

    Clarke, Frank W., 1895, The constitution of the silicates: U.S. Geological Survey bulletin 125, 109 p.; 24 cm.

    Clarke, Frank W., 1900, Analyses of rocks from the laboratory of the United States Geological survey 1880-1899: U.S. Geological Survey bulletin 168, 308 p.; xi pl., 24 cm.

    Clarke, Frank W., 1900, Contributions to chemistry and mineralogy from the laboratory of the United States Geological survey: U.S. Geological Survey bulletin 167, 166, xi p.: diagrs.; 24 cm.

    Clarke, Frank W., 1903, Mineral analyses from the laboratories of the United States Geological survey, 1880 to 1903: U.S. Geological Survey bulletin 220, 119 p.: ill.; 24 cm.

    Clarke, Frank W., 1904, Analyses of rocks from the laboratory of the United States Geological survey, 1880 to 1903: U.S. Geological Survey bulletin 228, 375, iii p.; 24 cm.

    Clarke, Frank W., 1908, The data of geochemistry: U.S. Geological Survey bulletin 330, 716, iii p.; 24 cm.

    Clarke, Frank W., 1910, Analysis of rocks and minerals from the laboratory of the United States Geological survey, 1880 to 1908: U.S. Geological Survey bulletin 419, 323 p..

    Clarke, Frank W., 1911, The data of geochemistry: U.S. Geological Survey bulletin 491, 782 p.; 24 cm.

    Clarke, Frank W., 1914, The constitution of the natural silicates: U.S. Geological Survey bulletin 588, 128 p.; 24 cm.

    Clarke, Frank W., 1914, Water analyses from the Laboratory of the United States geological survey: U.S. Geological Survey water supply paper 364, 40 p.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp364#>.

    Clarke, Frank W., 1915, Analyses of rocks and minerals from the laboratory of the United States Geological Survey, 1880 to 1914: U.S. Geological Survey bulletin 591, 376 p.; 24 cm.

    Clarke, Frank W., 1916, The data of geochemistry: U.S. Geological Survey bulletin 616, 821 p.; 24 cm.

    Clarke, Frank W., 1920, The data of geochemistry: U.S. Geological Survey bulletin 695, 832 p..

    Clarke, Frank W., 1924, The data of geochemistry: U.S. Geological Survey bulletin 770, 841 p.; tables; 23 cm.

    Clarke, Frank W., and Chatard, Thomas M., 1884, A Report of work done in the Washington laboratory during the fiscal year 1883-84: U.S. Geological Survey bulletin 9, 40 p.; 24 cm.

    Clarke, Frank W., and Hillebrand, William F., 1897, Analyses of rocks, with a chapter on analytical methods, laboratory of the United States Geological survey 1880 to 1896: U.S. Geological Survey bulletin 148, 306, ix p.; 24 cm.

    Clarke, Frank W., and Steiger, George, 1902, The action of ammonium chloride upon silicates: U.S. Geological Survey bulletin 207, 57 p.; 24 cm.

    Clarke, Frank W., Hillebrand, William F., Ransome, Frederick L., 1905, Contributions to mineralogy from the United States Geological survey: U.S. Geological Survey bulletin 262, 147, v p. : ill. ; 24 cm..

    Clarke, Roy S., Jr., and Altschuler, Zalman S., 1956, The determination of uranium (IV) in apatite: U.S. Geological Survey trace elements investigations report 5637, 30 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei637#>.

    Clarke, Roy S., Jr., and Cuttitta, Frank, 1957, Determination of thallium by a dithizone mixed-color method: U.S. Geological Survey trace elements investigations report 667, 20 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei667#>.

    Clifton, H. Edward, and Hubert, Arthur E., 1967, Marine sediment sample preparation for analysis for low concentrations of fine detrital gold: U.S. Geological Survey circular 545, 11 p.: map; 26 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir545#>.

    Cremer, Marcelyn J., Klock, Paul R., Neil, Sara T., and Riviello, J.M., 1984, Chemical methods for analysis of rocks and minerals: U.S. Geological Survey open-file report 84-565, 149 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr84565#>.

    Crenshaw, George L., and Lakin, Hubert W., 1974, A sensitive and rapid method for the determination of trace amounts of selenium in geologic materials: U.S. Geological Survey Journal of Research, vol 2, no 4, p. 483-487.

    Crock, James G., 1986, The determination of bismuth in geological reference materials by automated hydride generation-atomic absorption spectroscopy: Analytical Letters, vol 19, 1367-1385.

    Crock, James G., 2005, Determination of total mercury in biological and geological samples a presentation for the 2004 Teledyne Leeman Labs "Seminar on Low-Level Mercury Data and Analyses": U.S. Geological Survey open-file report 2005-1030, , accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2005/1030/#>.

    Crock, James G., and Lichte, Frederick E., 1981, The determination of trace-level antimony in geological materials by semi-automated hydride generation-atomic absorption spectroscopy: U.S. Geological Survey open-file report 81-671, 24 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr81671#>.

    Crock, James G., and Lichte, Frederick E., 1981, The determination of trace-level arsenic in geological materials by semi-automated hydride generation-atomic absorption spectroscopy: U.S. Geological Survey open-file report 81-672, 20 leaves: ill; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr81672#>.

    Crock, James G., and Lichte, Frederick E., 1982, An improved method for the determination of arsenic and antimony in geologic materials by automated hydride generation-atomic absorption spectroscopy: Analytica Chimica Acta, vol 144, 223-233.

    Crock, James G., and Lichte, Frederick E., 1982, The determination of rare-earth elements in geological materials by inductively argon coupled plasma-optical emission spectroscopy: Analytical Chemistry, vol 54, 1329-1333.

    Crock, James G., and Severson, Ronald C., 1980, Four reference soil and rock samples for measuring element availability in the western energy regions: U.S. Geological Survey circular 841, iii, 16 p.: ill.; 26 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir841#>.

    Crock, James G., Briggs, Paul H., Jackson, Larry L., and Lichte, Frederick E., 1987, Analytical methods for the analysis of stream sediments and rocks from Wilderness Study Areas: U.S. Geological Survey open-file report 87-84, 35 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr8784#>.

    Crock, James G., Lichte, Frederick E., and Briggs, Paul H., 1983, Determination of elements in National Bureau of Standards geological reference materials SRM278 obsidian and SRM 688 basalt by inductively coupled plasma-atomic emission spectroscopy: Geostandards Newsletter, vol 7, 335-340.

    Curry, Kenneth J., 1996, Total carbon by combustion, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 173-176, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Curry, Kenneth J., 1996, Total sulfur by combustion, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 177-181, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Curry, Kenneth J., and Papp, Clara S.E., 1996, Acid-soluble sulfate, sulfide, and organic sulfur, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 182-185, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Cuthbert, Margaret, and Ward, Frederick N., 1964, Determination of iodine in vegetation: U.S. Geological Survey professional paper 501-C; in "Geological Survey Research 1964", p. C154-C156.

    Cuttitta, Frank, 1951, A photometric method for the estimation of the oil yield of oil shale: U.S. Geological Survey trace elements investigations report 152, 30 p.; : ill. ; 27 cm.

    Cuttitta, Frank, 1952, A volumetric method for the estimation of the oil yield of oil shale: U.S. Geological Survey trace elements investigations report 210, 13 leaves: ill.; 29 cm, accessed November 2, 2009 at <http://pubs.er.usgs.gov/usgspubs/tei/tei210>.

    Cuttitta, Frank, 1952, The colorimetric determination of total iron with o-phenanthroline : a spectrophotometric study: U.S. Geological Survey trace elements investigations report 223, 25 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei223#>.

    Cuttitta, Frank, 1955, Determination of thorium in zircon: U.S. Geological Survey trace elements investigations report 498, 25 leaves; ill.; 27 cm.

    Cuttitta, Frank, 1957, Annotated bibliography of the analytical chemistry of niobium and tantalum, January 1935-June 1953: U.S. Geological Survey bulletin 1029-A; in "Selected Bibliographies of Analytical Chemistry", 73 p.; 24 cm.

    Cuttitta, Frank, 1960, Determination of small quantities of oxygen adsorbed on anatase: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B488-B490.

    Cuttitta, Frank, 1961, Dithizone mixed-color method for determining small amounts of thallium in manganese ores: U.S. Geological Survey professional paper 424-C; in "Geological Survey Research 1961", p. C384-C385.

    Cuttitta, Frank, and Brittin, Edward, 1954, Retention of uranium during oxidative ashing of selected naturally occurring carbonaceous substances: U.S. Geological Survey trace elements investigations report 461, 8 leaves; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei461#>.

    Cuttitta, Frank, and Kinser, Charles A., 1953, An improved tubular electric furnace for the closed-tube distillation of oil from oil shale: U.S. Geological Survey trace elements investigations report 326, 15 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei326#>.

    Cuttitta, Frank, and Warr, Jesse J., 1957, Retention of lead during oxidative ashing of selected naturally occurring carbonaceous substances: U.S. Geological Survey trace elements investigations report 683, 9 leaves; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei683#>.

    Cuttitta, Frank, and Warr, Jesse J., 1960, Determination of lead in pyrites: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B485-B486.

    Cuttitta, Frank, and Warr, Jesse J., 1960, Determination of lead in zircon with dithizone: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B486-B487.

    Cuttitta, Frank, and Warr, Jesse J., 1960, Preparation of lead iodide for mass spectrometry: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B487-B488.

    Cuttitta, Frank, and Warr, Jesse J., 1961, Use of bathophenanthroline for determining traces of iron in zircon: U.S. Geological Survey professional paper 424-C; in "Geological Survey Research 1961", p. C383-C384.

    Cuttitta, Frank, Senftle, Frank E., and Walker, Edward C., 1960, Preliminary tests of isotopic fractionation of copper adsorbed on quartz and sphalerite: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B491-B493.

    Damrau, Donna L., 1993, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of low-level silver by graphite furnace atomic absorption spectrophotometry: U.S. Geological Survey open-file report 93-416, v, 14 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr93416#>.

    d'Angelo, William M., 1996, Chlorine in coal by ion chromatography, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 154-157, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    d'Angelo, William M., and Ficklin, Walter H., 1996, Fluoride, chloride, nitrate, and sulfate in aqeous solution by chemically suppressed ion chromatography, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 149-153, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Delevaux, Maryse H., Smith, Roberta K., and Grimaldi, Frank S., 1954, The photometric determination of aluminum in phosphate materials with ferron: U.S. Geological Survey trace elements investigations report 450, 19 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei450#>.

    Dietrich, John A., Cooley, Elmo F., and Curry, Kenneth J., 1977, A device for automatic photoelectric control of the analytical gap for emission spectrographs: U.S. Geological Survey circular 748, iii, 5 p.: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir748#>.

    Dinnin, Joseph I., 1959, Rapid analysis of chromite and chrome ore: U.S. Geological Survey bulletin 1084-B; in "Contributions to Geochemistry", p. iv, 31-68: ill., 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1084B#>.

    Dinnin, Joseph I., 1960, Determination of total iron in chromite and chrome ore: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B476-B477.

    Dinnin, Joseph I., 1961, Flame photometric determination of strontium with the use of releasing agents: U.S. Geological Survey professional paper 424-D; in "Geological Survey Research 1961", p. D392-D394.

    Dinnin, Joseph I., 1961, Gravimetric determination of silica in chromite and chrome ore: U.S. Geological Survey professional paper 424-D; in "Geological Survey Research 1961", p. D397-D399.

    Dinnin, Joseph I., 1961, Use of releasing agents in the flame photometric determination of magnesium and barium: U.S. Geological Survey professional paper 424-D; in "Geological Survey Research 1961", p. D391-D392.

    Dinnin, Joseph I., and Kinser, Charles A., 1961, Indirect semiautomatic determination of alumina with EDTA: U.S. Geological Survey professional paper 424-B; in "Geological Survey Research 1961", p. B329-B331.

    Dinnin, Joseph I., and Williams, E.G., 1961, Chemical aid for distinguishing chromite, ilmenite, and magnetite: U.S. Geological Survey professional paper 424-D; in "Geological Survey Research 1961", p. D394.

    Dinnin, Joseph I., and Worthing, Helen W., 1966, Determination of microquantities of mercury in sulfide ores by penfield tube-dithizone and semiquantitative spectrographic methods: U.S. Geological Survey professional paper 550-C; in "Geological Survey Research 1966", p. C220-C223.

    Doe, Bruce R., 1968, A list of references on lead isotope geochemistry through 1966: U.S. Geological Survey open-file report 1136, 97 p.; 27 cm.

    Doe, Bruce R., 1971, A list of references on lead isotope geochemistry, 1967-1969, with an addendum to the list through 1966: U.S. Geological Survey open-file report 1582, 28 p.; 27 cm.

    Doe, Bruce R., 1976, Lead isotope data bank : 2,624 samples and analyses cited: U.S. Geological Survey open-file report 76-201, x, 104 leaves; 22 x 28 cm.

    Doe, Bruce R., 1977, A list of references on lead isotope geochemistry : 1970-1974: U.S. Geological Survey open-file report 77-749, 87 p.; 28 cm.

    Doe, Bruce R., 1984, A Strategy for adoption of accelerator mass spectrometry by the earth sciences: U.S. Geological Survey open-file report 84-664, 36 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr84664#>.

    Doe, Bruce R., and Rohrbough, Randall, 1979, Lead isotope data bank: 3,458 samples and analyses cited: U.S. Geological Survey open-file report 79-661, xiv, 137 p.; 28 cm.

    Doe, Bruce R., Tatsumoto, Mitsunobu, Delevaux, Maryse H., and Peterman, Zell E., 1967, Isotope-dilution determination of five elements in G-2 (granite), with a discussion of the analysis of lead: U.S. Geological Survey professional paper 575-B; in "Geological Survey Research 1967", p. B170-B177.

    Doering, Willis P., 1968, A rapid method for measuring the Rb/Sr ratio in silicate rocks: U.S. Geological Survey professional paper 600-C; in "Geological Survey Research 1968", p. C164-C168.

    Domenico, James A., and Viets, John G., 1980, The design of mobile laboratories used in geochemical exploration: U.S. Geological Survey open-file report 80-301, ii, 22 leaves: ill.; 29 cm.

    Dorrzapf, Anthony F., Jr., 1967, Spectrographic detection limits of the noble metals: U.S. Geological Survey open-file report 1582, 76 leaves: ill.; 31 cm.

    Dorrzapf, Anthony F., Jr., 1973, Spectrochemical computer analyses, argon-oxygen d-c arc method for silicate rocks: U.S. Geological Survey Journal of Research, vol 1, no 5, p. 559-562.

    Dorrzapf, Anthony F., Jr., and Brown, Floyd W., 1970, Direct spectrographic analysis for platinum, palladium and rhodium in gold beads from fire assay: Applied Spectroscopy, vol 24, 415-418.

    Doughten, Michael W., and Aruscavage, Philip J., 1996, Niobium, tungsten, and molybdenum by ion exchange/inductively coupled plasma-atomic emission spectrometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 126-129, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Doughten, Michael W., and Grossman, Jeffrey N., 1993, Method descriptions and bibliography of routine work performed by the Branch of Geochemistry analytical laboratories, U.S. Geological Survey: U.S. Geological Survey open-file report 93-1-B, 16 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr931B#>.

    Durum, Walton H., 1978, Historical profile of quality of water laboratories and activities, 1879-1973: U.S. Geological Survey open-file report 78-432, 1 v. : ill., map ; 28 cm.

    Durum, Walton H., and Haffty, Joseph, 1961, Occurrence of minor elements in water: U.S. Geological Survey circular 445, iii, 11 p.; maps, diagrs., tables; 27cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir445#>.

    Edwards, Kenneth W., 1968, Isotopic analysis of uranium in natural waters by alpha spectrometry: U.S. Geological Survey water supply paper 1696-F; in "Radiochemical Analysis of Water", iv, 26 p.: ill.; 23 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1696F#>.

    Eggers, JoAnn, and Friedman, Linda C., 1989, National Research Program of the Water Resources Division, U.S. Geological Survey, fiscal year 1989: U.S. Geological Survey open-file report 91-67, iii, 303 p.; 28 cm.

    Elsheimer, H. Neil, 1987, Application of an ion-selective electrode method to the determination of chloride in 41 international geochemical reference materials: Geostandards Newsletter, vol 11, 115-122.

    Elsheimer, H. Neil, 1987, X-ray spectrometric analysis of major and selected minor elements in silicate rocks utilizing an automatic fusion technique: U.S. Geological Survey open-file report 87-71, 16 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr8771#>.

    Erdmann, David E., 1991, Quality assurance requirements for water-quality laboratories providing analytical survices for the Water Resources Division of the U.S. Geological Survey: U.S. Geological Survey open-file report 91-222, iii, 8 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr91222#>.

    Erdmann, David E., 1991, Technical review of water-quality laboratories providing analytical services for the Water Resources Division of the U.S. Geological Survey: U.S. Geological Survey open-file report 91-223, iii, 19 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr91223#>.

    Erdmann, David E., Anthony, E.R., and Perryman, G.R., 1982, 1983 Water quality laboratory services catalog: U.S. Geological Survey open-file report 82-766, 1 v. (loose-leaf); 28 cm.

    Fabbi, Brent P., 1970, A die for pelletizing samples for X-ray fluorescence analysis: U.S. Geological Survey professional paper 700-B; in "Geological Survey Research 1970", p. B187-B189.

    Fahey, Joseph J., 1961, A method for determining specific gravity of sand and ground rock or minerals: U.S. Geological Survey professional paper 424-C; in "Geological Survey Research 1961", p. C372-C373.

    Fahey, Joseph J., 1961, Determination of ferrous iron in magnetite and ilmenite in the presence of amphiboles and pyroxenes: U.S. Geological Survey professional paper 424-C; in "Geological Survey Research 1961", p. C386-C387.

    Fahey, Joseph J., and Foster, Margaret D., 1945, Preliminary report on a method for the determination of small quantities of thorium: U.S. Geological Survey trace elements investigations report 16, 16 p.; 3 figs., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei16#>.

    Ficklin, Walter H., 1970, A rapid method for the determination of fluoride in rocks and soils, using an ion-selective electrode: U.S. Geological Survey professional paper 700-C; in "Geological Survey Research 1970", p. C186-C188.

    Ficklin, Walter H., 1975, Ion-selective electrode determination of iodine in rocks and soils: U.S. Geological Survey Journal of Research, vol 3, no 6, p. 753-755.

    Ficklin, Walter H., and Ward, Frederick N., 1976, Flameless atomic absorption determination of bismuth in soils and rocks: U.S. Geological Survey Journal of Research, vol 4, no 2, p. 217-220.

    Finkelman, Robert B., et al, 1994, The U.S. Geological Survey Coal Quality data base (COALQUAL): U.S. Geological Survey open-file report 94-177, 46 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr94177#>.

    Fishman, Marvin J., and Bradford, W.L., 1982, A supplement to the methods for the determination of inorganic substances in water and fluvial sediments: U.S. Geological Survey open-file report 82-272, 136 p..

    Fishman, Marvin J., and Brown, Eugene, 1976, Selected methods of the U.S. Geological Survey for the analyses of wastewaters: U.S. Geological Survey open-file report 76-177, 87 leaves: ill.; 27 cm.

    Fishman, Marvin J., and Downs, Sanford C., 1966, Methods for analysis of selected metals in water by atomic absorption: U.S. Geological Survey water supply paper 1540-C; in "Spectrographic Analysis of Natural Water", iii, 23-45 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1540C#>.

    Fishman, Marvin J., and Friedman, Linda C., and Boyle, Delora K., 1982, U.S. Geological Survey standard reference water samples for pesticides: U.S. Geological Survey water resources investigations report 82-28, iv, 28 p.: ill., figures, tables, charts; 28 cm.

    Fishman, Marvin J., and Friedman, Linda C., editors, 1985, Methods for determination of inorganic substances in water and fluvial sediments: U.S. Geological Survey open-file report 85-495, xiv, 709 p.: ill.; 28 cm.

    Fishman, Marvin J., and Friedman, Linda C., editors, 1989, Methods for determination of inorganic substances in water and fluvial sediments: Techniques of water resources investigations of the United States Geological Survey bk. 5, ch. A1 1989, xii, 545 p.: ill.; 26 cm, accessed November 2, 2009 at #<http://water.usgs.gov/pubs/twri/twri5-a1/#>.

    Fishman, Marvin J., and Pyen, Grace, 1979, Determination of selected anions in water by ion chromatography: U.S. Geological Survey water resources investigations report 79-101, iv, 30 p.: ill.; 27 cm.

    Fishman, Marvin J., and Spencer, R., 1977, Automated atomic absorption spectrometric determination of total arsenic in water and stream bed materials: Analytical Chemistry, vol 49, 1599-1602.

    Fishman, Marvin J., editor, 1993, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of inorganic and organic constituents in water and fluvial sediments: U.S. Geological Survey open-file report 93-125, x, 217 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr93125#>.

    Fishman, Marvin J., et al, 1994, U.S. Geological Survey approved inorganic and organic methods for the analysis of water and fluvial sediment, 1954-94: U.S. Geological Survey open-file report 94-351, iii, 55 p.; 28 cm, accessed November 2, 2009 at #<http://wwwnwql.cr.usgs.gov/Public/pubs/OFR94-351/OFR_94-351.html># .

    Flanagan, Fancis J., 1964, Judging the analytical ability of rock analysts by chi-squared: U.S. Geological Survey professional paper 501-C; in "Geological Survey Research 1964", p. C157-C159.

    Flanagan, Francis J., 1956, Semiquantitative spectrographic analysis and rank correlation in geochemistry: U.S. Geological Survey trace elements investigations report 628, 17 p.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei628#>.

    Flanagan, Francis J., 1961, Fatigue in scintillation counting: U.S. Geological Survey professional paper 424-B; in "Geological Survey Research 1961", p. B324-B326.

    Flanagan, Francis J., 1984, Three USGS mafic rock references samples, W-2, DNC-1, and BIR-1: U.S. Geological Survey bulletin 1623, iii, 54 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1623#>.

    Flanagan, Francis J., 1986, Additions and corrections for USGS bulletin 1623, three USGS mafic rock reference samples, W-2, DNC-1, and BIR-1: U.S. Geological Survey open-file report 86-220, 6 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr86220#>.

    Flanagan, Francis J., 1986, Reference samples in geology and geochemistry: U.S. Geological Survey bulletin 1582, iv, 70 p.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1582#>.

    Flanagan, Francis J., and Gottfried, David., 1980, USGS rock standards, III : manganese nodule reference samples, USGS-Nod-A-1 and USGS-Nod-P-1: U.S. Geological Survey professional paper 1155, iv, 39 p.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp1155#>.

    Flanagan, Francis J., and Kellagher, Richard C., 1955, A comparison of sample splitting methods: U.S. Geological Survey trace elements investigations report 505, 16 leaves; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei505#>.

    Flanagan, Francis J., and McCall, B.A., 1955, An improved glass sample holder for assaying low radioactivity samples: U.S. Geological Survey trace elements investigations report 568, 7 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei568#>.

    Flanagan, Francis J., and Senftle, Frank E., 1953, Tables for the calculation of radioactive equilibrium from Bateman's equation: U.S. Geological Survey trace elements investigations report 333, 18 leaves; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei333#>.

    Flanagan, Francis J., editor, 1976, Descriptions and analyses of eight new USGS rock standards: U.S. Geological Survey professional paper 840, vi, 192 p.: ill., maps; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp840#>.

    Flanagan, Francis J., Kellagher, Richard C., and Smith, William L., 1958, The slotted cone splitter: U.S. Geological Survey trace elements investigations report 720, 18 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei720#>.

    Fletcher, Janet D., and Golightly, Danold W., 1985, The determination of 28 elements in whole coal by direct-current arc spectrography: U.S. Geological Survey open-file report 85-204, 10 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr85204#>.

    Fletcher, Mary H., 1950, A study of critical factors in the "direct" fluorimetric determination of uranium: U.S. Geological Survey trace elements investigations report 130, 40 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei130#>.

    Fletcher, Mary H., and May, Irving, 1950, An improved fluorimeter for the determination of uranium in fluoride melts: U.S. Geological Survey open-file report 50-33, 10 p.; 6 leaves of plates : ill. ; 29 cm..

    Fletcher, Mary H., and May, Irving, 1950, An improved fluorimeter for the determination of uranium in fluoride melts: U.S. Geological Survey trace elements investigations report 120, 10 leaves, 6 leaves of plates: ill.; 29 cm.

    Fletcher, Mary H., and Milkey, Robert G., 1954, A spectrophotometric study of the thorium-morin mixed-color system: U.S. Geological Survey trace elements investigations report 460, 40 leaves: ill.; 29 cm.

    Fletcher, Mary H., and Warner, E. Ray, 1951, A fluorimeter for solutions: U.S. Geological Survey open-file report 51-66, 6 p. : ill. ; 27 cm..

    Fletcher, Mary H., and Warner, E. Ray, 1951, A fluorimeter for solutions: U.S. Geological Survey trace elements investigations report 252, p.: ill.; 27 cm.

    Fletcher, Mary H., and Warner, E. Ray, 1953, A fluorimeter for solutions: U.S. Geological Survey circular 311, 9 p.; illus.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir311#>.

    Fletcher, Mary H., Grimaldi, Frank S., and Jenkins, Lillie B., 1956, The thoron-mesotartaric acid system for the determination of thorium: U.S. Geological Survey trace elements investigations report 350, 25 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei350#>.

    Fletcher, Mary H., May, Irving, and Anderson, J. W., 1951, The design of the model V transmission fluorimeter: U.S. Geological Survey open-file report 51-65, 5 p. : 7 ill. ; 27 cm..

    Fletcher, Mary H., May, Irving, and Anderson, J.W., 1950, The design of the Model V transmission fluorimeter: U.S. Geological Survey trace elements investigations report 133, 5 p.: 7 ill.; 27 cm.

    Fletcher, Mary H., May, Irving, and Slavin, Morris, 1949, A transmission fluorimeter for use in the fluorimetric method of analysis for uranium: U.S. Geological Survey trace elements investigations report 104, 14 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei104#>.

    Fletcher, Mary H., May, Irving, and Slavin, Morris, 1950, A transmission fluorimeter for use in the fluorimetric method of analysis for uranium: U.S. Geological Survey open-file report 50-34, 14 p.: ill. ; 29 cm..

    Foster, Margaret D., Grimaldi, Frank S., and Stevens, Rollin E., 1945, Preliminary report on methods of analysis for very small percentages of uranium: U.S. Geological Survey trace elements investigations report 2, 19 leaves : ill. ; 27 cm., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei2#>.

    Friedman, Linda C., 1978, 1979 Water quality laboratory services catalog: U.S. Geological Survey open-file report 78-842, 1 v. (various pagings); 28 cm.

    Friedman, Linda C., 1978, Water Quality Laboratory services catalog: U.S. Geological Survey open-file report 78-502+, v.; 22 x 28 cm --.

    Friedman, Linda C., 1980, Procedures for quality assurance of polyethylene bottles and nitric acid ampoules for trace-metal analyses of water-quality samples: U.S. Geological Survey open-file report 80-157, iii, 19 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr80157#>.

    Friedman, Linda C., and Beetem, W. Arthur, 1979, 1980 Water quality laboratory services catalog: U.S. Geological Survey open-file report 79-697, 186 p.; 28 cm.

    Friedman, Linda C., and Erdmann, David E., 1981, Quality assurance practices for the chemical and biological analyses of water and fluvial sediments: U.S. Geological Survey open-file report 81-650, viii, 323 p.: ill.; 28 cm.

    Friedman, Linda C., and Erdmann, David E., 1982, Quality assurance practices for the chemical and biological analyses of water and fluvial sediments: Techniques of water resources investigations of the United States Geological Survey bk. 5, ch. A6, ix, 181 p.: ill., forms; 27 cm, accessed November 2, 2009 at #<http://water.usgs.gov/pubs/twri/twri5a6/#>.

    Friedman, Linda C., and Fishman, Marvin J., 1989, Evaluation of methods used from 1965 through 1982 to determine inorganic constituents in water samples: U.S. Geological Survey water supply paper 2293, vii, 126 p.: ill. (some col.); 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp2293#>.

    Fries, Terry L., Christie, Joseph H., and Pribble, Sarah T., 1996, Flame photometric determination of K2O and Na2O, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 144-148, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Fries, Terry L., Christie, Joseph H., Pribble, Sarah T., and Siems, David F., 2002, Flame photometric determination of K2O, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. P1-P5, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/P29K2O_M.pdf#>.

    Fries, Terry L., Lamothe, Paul J., and Pesek, J.J., 1984, Determination of rare-earth elements in manganese nodules by inductively coupled argon-plasma emission spectroscopy: Analytica Chimica Acta, vol 159, 326-336.

    Frost, Irving C., 1960, Comparison of three methods for the determination of total and organic carbon in geochemical studies: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B480-B483.

    Frost, Irving C., 1961, Evaluation of the use of dichromate oxidation to estimate the organic carbon content of rocks: U.S. Geological Survey professional paper 424-C; in "Geological Survey Research 1961", p. C376-C377.

    Garbarino, John R., 1999, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of dissolved arsenic, boron, lithium, selenium, strontium, thallium, and vanadium using inductively coupled plasma-mass spectrometry: U.S. Geological Survey open-file report 99-93, vi, 31 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://wwwnwql.cr.usgs.gov/Public/pubs/OFR99-093/OFR99-093.html#>.

    Garbarino, John R., 2000, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of whole-water recoverable arsenic, boron, and vanadium using inductively coupled plasma-mass spectrometry: U.S. Geological Survey open-file report 99-464, vi, 15 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://wwwnwql.cr.usgs.gov/Public/pubs/OFR99-464/OFR99-464.html#>.

    Garbarino, John R., and Damrau, Donna L., 2001, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of organic plus inorganic mercury in filtered and unfiltered natural water with cold vapor-atomic fluorescence spectrometry: U.S. Geological Survey water resources investigations report 01-4132, v, 16 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://wwwnwql.cr.usgs.gov/Public/pubs/WRIR01-4132.pdf#>.

    Garbarino, John R., and Hoffman, Gerald L., 1999, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : comparison of a nitric acid in-bottle digestion procedure to other whole-water digestion procedures: U.S. Geological Survey open-file report 99-94, vi, 21 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://nwql.usgs.gov/Public/pubs/OFR99-094.html#>.

    Garbarino, John R., and Struzeski, Tedmund M., 1998, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of elements in whole-water digests using inductively coupled plasma-optical emission spectrometry and inductively coupled plasma-mass spectrometry: U.S. Geological Survey open-file report 98-165, xii, 101 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://nwql.usgs.gov/OFR-98-165.shtml#>.

    Garbarino, John R., and Taylor, Howard E., 1996, Inductively coupled plasma-mass spectrometric method for the determination of dissolved trace elements in natural water: U.S. Geological Survey open-file report 94-358, v, 49 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr94358#>.

    Garbarino, John R., Bednar, Anthony J., and Burkhardt, Mark R., 2002, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : arsenic speciation in natural-water samples using laboratory and field methods: U.S. Geological Survey water resources investigations report 02-4144, vi, 40 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://nwql.usgs.gov/Public/pubs/WRIR02-4144.html#>.

    Garbarino, John R., Kanagy, Leslie K., and Cree, Mark E., 2006, Determination of elements in natural-water, biota, sediment, and soil samples using collision/reaction cell inductively coupled plasma-mass spectrometry: Techniques of water resources investigations of the United States Geological Survey bk. 5, B-1, xi, 87 p.: ill.; 28 cm, accessed November 2, 2009 at #<https://pubs.water.usgs.gov/tm5b1/#>.

    Gent, Carol A., and Wilson, Stephen A., 1985, The determination of sulfur and chlorine in coals and oil shales using ion chromatography: Analytical Letters, vol 16, 729-740.

    Goerlitz, Donald F., 1976, Determination of volatile organohalides in water and treated sewage effluents: U.S. Geological Survey open-file report 76-610, 14, [7] leaves: ill.; 27 cm.

    Goerlitz, Donald F., 1979, Analysis of Picric acid in water by high-performance liquid chromatography: U.S. Geological Survey open-file report 79-207, iv, 7 leaves; 27 cm.

    Goerlitz, Donald F., 1979, Direct analysis of RDX and TNT in water by high-performance liquid chromatography: U.S. Geological Survey open-file report 79-916, iv, 7 p..

    Goerlitz, Donald F., 1982, Determination of pentachlorophenol in water and aquifer sediments by high-performance liquid chromatography: U.S. Geological Survey open-file report 82-124, 12 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr82124#>.

    Goerlitz, Donald F., and Brown, Gene, 1972, Methods for analysis of organic substances in water: Techniques of water-resources investigations of the United States Geological Survey ; bk. 5, ch. A3, v, 40 p.; 26 cm, accessed November 2, 2009 at #<http://water.usgs.gov/pubs/twri/twri5-a3/#>.

    Goerlitz, Donald F., and Lamar, William L., 1964, Effluent collector for gas chromatography: U.S. Geological Survey professional paper 475-D; in "Geological Survey Research 1963", p. D164-D167, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp475D#>.

    Goerlitz, Donald F., and Lamar, William L., 1965, Microcoulometric gas chromatographic analysis of selected herbicides in water: , 11 p.; 27 cm.

    Goerlitz, Donald F., and Lamar, William L., 1967, Determination of phenoxy acid herbicides in water by electron-capture and microcoulometric gas chromatography: U.S. Geological Survey water supply paper 1817-C; in "Organic Substances in Water", 21 p.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1817C#>.

    Goerlitz, Donald F., and Law, LeRoy M., 1975, Gas chromatographic method for analysis of TNT and RDX explosives contaminating water and sail-core material: U.S. Geological Survey open-file report 75-182, iv, 11 p.; 26 cm.

    Goldberg, Marvin C., Gottschall, W. Carl, and Janzer, Victor J.,, 1970, Neutron-activation analysis applied to hydrologic investigations: U.S. Geological Survey open-file report 70-137, [1], 5, [5] leaves: ill.; 27 cm.

    Golightly, Danold W., 1978, Recent geochemical applications of the inductively coupled argon-plasma: "Applications of inductively coupled plasmas to emission spectroscopy", Eastern Analytical Symposium, 107-119.

    Golightly, Danold W., and Simon, Frederick O., 1989, Methods for sampling and inorganic analysis of coal: U.S. Geological Survey bulletin 1823, viii, 72 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://energy.er.usgs.gov/products/papers/B1823/index.htm#>.

    Golightly, Danold W., Dorrzapf, Anthony F., Jr., and Berman, Sol, 1987, Trace boron concentrations in geologic standard materials determined by fluoride-volatilization arc spectrography: U.S. Geological Survey open-file report 87-150, 9, [1] leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr87150#>.

    Golightly, Danold W., Dorrzapf, Anthony F., Jr., and Thomas, C.P., 1977, Sets of spectral lines for spectrographic thermometry and manometry in d-c arcs of geologic materials: Spectrochimica Acta, vol 32B, 313-325.

    Golightly, Danold W., Dorrzapf, Anthony F., Jr., Mays, Robert E., Fries, Terry L., and Conklin, Nancy M., 1987, Analysis of geologic materials by direct-current arc emission spectrography and spectrometry, in Methods for geochemical analysis: U.S. Geological Survey bulletin 1770-A, p. A1-A13.

    Gottfried, David, Jaffe, Howard W., and Senftle, Frank E., 1959, Evaluation of the lead-alpha (Larsen) method for determining ages of igneous rocks: U.S. Geological Survey bulletin 1097-A; in "Studies in Geochronology", iv, 63 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1097A#>.

    Greenland, L. Paul, 1967, Determination of phosphorus in silicate rocks by neutron activation: U.S. Geological Survey professional paper 575-C; in "Geological Survey Research 1967", p. C137-C139.

    Greenland, L. Paul, and Campbell, E.Y., 1971, Substoichiometric determination of tantalum by neutron activation: U.S. Geological Survey professional paper 750-B; in "Geological Survey Research 1971", p. B191-B193, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp750B#>.

    Greenland, L. Paul, and Campbell, E.Y., 1974, Spectrophotometric determination of niobium in rocks: U.S. Geological Survey Journal of Research, vol 2, no 3, p. 353-355.

    Greenland, L. Paul, and Campbell, E.Y., 1976, Rapid determination of nanogram amounts of tellurium in silicate rocks: Analytica Chimica Acta, vol 87, 323-328.

    Greenland, L. Paul, and Campbell, E.Y., 1977, Application of selenium hydride-atomic absorption technique to test for homogeneity of USGS standard rocks: U.S. Geological Survey Journal of Research, vol 5, no 4, p. 403-404.

    Greenland, L. Paul, and McLane, John E., 1969, Determination of germanium in silicates by neutron activation analysis: U.S. Geological Survey professional paper 650-C; in "Geological Survey Research 1969", p. C152-C154, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp650C#>.

    Greenland, L. Paul, Rowe, Jack James, and Dinnin, Joseph I., 1971, Application of triple coincidence counting and of fire-assay separation to the neutron activation determination of iridium: U.S. Geological Survey professional paper 750-B; in "Geological Survey Research 1971", p. B175-B179, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp750B#>.

    Griffitts, Wallace R., and Patten, Lorraine E., 1961, Determining the distribution of beryllium in rocks by a contact-print method: U.S. Geological Survey professional paper 424-C; in "Geological Survey Research 1961", p. C378.

    Grimaldi, Frank S., 1946, Elimination of interference by nickel in the determination of uranium by means of zinc amalgam reductors: U.S. Geological Survey trace elements investigations report 23, 5 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei23#>.

    Grimaldi, Frank S., 1953, Quercetin as a colorimetric reagent for zirconium: U.S. Geological Survey open-file report 207, iv, 93 leaves: ill.; 29 cm.

    Grimaldi, Frank S., 1960, Dilution-addition method for flame photometry: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B494-B495.

    Grimaldi, Frank S., and Fairchild, J.G., 1945, Preliminary report on methods of analysis for very small percentages of thorium, part 1: U.S. Geological Survey trace elements investigations report 15, 25 leaves; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei15#>.

    Grimaldi, Frank S., and Fletcher, Mary H., 1955, The thoron-tartaric acid systems for the spectrophotometric determination of thorium: U.S. Geological Survey trace elements investigations report 571, 25 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei571#>.

    Grimaldi, Frank S., and Guttag, Norma S., 1950, Short routine direct method for the fluorimetric determination of uranium in phosphate rocks: U.S. Geological Survey trace elements investigations report 134, 8 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei134#>.

    Grimaldi, Frank S., and Helz, Armin W., 1961, Trace element sensitivities: U.S. Geological Survey professional paper 424-D; in "Geological Survey Research 1961", p. D388-D391.

    Grimaldi, Frank S., and Levine, Harry, 1948, The rapid fluorimetric determination of uranium in low-grade ores : a preliminary report: U.S. Geological Survey trace elements investigations report 47, 13 leaves; 29 cm.

    Grimaldi, Frank S., and Levine, Harry, 1948, The rapid fluorimetric determination of uranium in low-grade ores: U.S. Geological Survey open-file report 50-35, 13 p.; 29 cm..

    Grimaldi, Frank S., and March, Charlotte A., 1947, The determination of thorium in high grade and low grade ores: U.S. Geological Survey trace elements investigations report 44, 20 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei44#>.

    Grimaldi, Frank S., and Schnepfe, Marian M., 1967, Determination of palladium in the parts-per-billion range in rocks: U.S. Geological Survey professional paper 575-C; in "Geological Survey Research 1967", p. C141-C144.

    Grimaldi, Frank S., and Schnepfe, Marian M., 1968, Determination of palladium and platinum in rocks: U.S. Geological Survey professional paper 600-B; in "Geological Survey Research 1968", p. B99-B103.

    Grimaldi, Frank S., and Simon, Frederick O., 1963, Determination of traces of boron in halite and anhydritic halite rocks: U.S. Geological Survey professional paper 475-B; in "Geological Survey Research 1963", p. B166-B168, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp475B#>.

    Grimaldi, Frank S., Cuttitta, Frank, and Ingram, Blanche L., 1954, The determination of small and large amounts of fluorine in rocks: U.S. Geological Survey trace elements investigations report 492, 19 leaves; 27 cm.

    Grimaldi, Frank S., Jenkins, Lillie B., and Fletcher, Mary H., 1956, The selective precipitation of thorium iodate from a tartaric acid-hydrogen peroxide medium : application to the rapid spectrophotometric determination of thorium in silicate rocks and in ores: U.S. Geological Survey trace elements investigations report 489, 23 leaves; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei489#>.

    Grimaldi, Frank S., May, Irving, and Fletcher, Mary H., 1952, U.S. Geological Survey fluorimetric methods of uranium analysis: U.S. Geological Survey circular 199; also U.S. Geological Survey trace elements investigations report 219, 53 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir199#>.

    Grimaldi, Frank S., May, Irving, and Fletcher, Mary H., 1952, U.S. Geological Survey fluorimetric methods of uranium analysis: U.S. Geological Survey trace elements investigations report 219, 53 p., 16 fig., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei219#>.

    Grimaldi, Frank S., May, Irving, Fletcher, Mary H., and Titcomb, Jane, 1954, Collected papers on methods of analysis for uranium and thorium: U.S. Geological Survey bulletin 1006, vii, 184 p.; illus., plates (6 fold. in pocket) diagrs., tables; 23 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1006#>.

    Grimaldi, Frank S., Shapiro, Leonard, and Schnepfe, Marian M., 1966, Determination of carbon dioxide in limestone and dolomite by acid-base titration: U.S. Geological Survey professional paper 550-B; in "Geological Survey Research 1966", p. B186-B188.

    Grimaldi, Frank S., Ward, Frederick N., and Kreher, Ruth, 1949, A direct quantitative fluorimetric method for the determination of small amounts of uranium in the field and laboratory: U.S. Geological Survey trace elements investigations report 98, 13 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei98#>.

    Grimaldi, Frank, and Levine, Harry, 1950, The fluorometirc determination of aluminum in phosphate rock with 8-hydroxyquinoline: U.S. Geological Survey trace elements investigations report 60, 13 p., 5 fig., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei60#>.

    Grimes, David J., and Marranzino, Albert P., 1968, Direct-current arc and alternating-current spark emission spectrographic field methods for the semiquantitative analysis of geologic materials: U.S. Geological Survey circular 591, iii, 6 p.; illus.; 26 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir591#>.

    Grossman, Jeffrey N., 1993, REPORT, a program for generating method descriptions and bibliographies of routine work performed in analytical chemistry laboratories: U.S. Geological Survey open-file report 93-1-A, 8 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr931A#>.

    Grossman, Jeffrey N., 1998, National geochemical atlas The geochemical landscape of the conterminous United States derived from stream sediment and other solid sample media analyzed by the National Uranium Evaluation (NURE) Program: U.S. Geological Survey open-file report 98-622, 1 computer laser optical disc: ill., map; 4 3/4 in, accessed November 2, 2009 at #<http://ngmdb.usgs.gov/Prodesc/proddesc_13041.htm#>.

    Grossman, Jeffrey N., 2004, The National Geochemical Survey, database and documentation: U.S. Geological Survey open-file report 2004-1001, Internet, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2004/1001/#>.

    Grossman, Jeffrey N., and Doughten, Michael W., 1993, A program for generating method descriptions and bibliographies of routine work performed in analytical chemistry laboratories computer file: U.S. Geological Survey open-file report 93-1-C, 1 computer disk; 3 1/2 in.

    Guttag, Norma S., and Grimaldi, Frank S., 1951, Fluorimetric determination of uranium in shales, lignites, and monazites after alkali carbonate separation: U.S. Geological Survey trace elements investigations report 153-A, 18 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei153A#>.

    Haffty, Joseph, 1960, Residue method for common minor elements: U.S. Geological Survey water-supply paper 1540-A; in "Spectrographic Analysis of Natural Water", iii, 9 p.: illus.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1540A#>.

    Haffty, Joseph, and Helz, Armin W., 1961, Direct-reading spectrometric technique for determination of major constituents in natural water: U.S. Geological Survey professional paper 424-B; in "Geological Survey Research 1961", p. B333-B334.

    Haffty, Joseph, and Pinckney, Darrell M., 1967, A method for the analyses of fluid inclusions by optical emission spectrography: U.S. Geological Survey professional paper 575-B; in "Geological Survey Research 1967", p. B178-B180.

    Haffty, Joseph, Haubert, A.W., and Page, Norman J., 1979, Determination of iridium and ruthenium in geological samples by fire assay and emission spectrography: U.S. Geological Survey professional paper 1129-G; in "Shorter Contributions to Geochemistry", p. G1-G4.

    Haffty, Joseph, Riley, Leonard B., and Goss, W.D., 1977, A manual on fire assaying and determination of the noble metals in geological materials : detailed description of techniques and methods of analysis: U.S. Geological Survey bulletin 1445, v, 58 p.: ill.; 24 cm.

    Hageman, Philip L., 2002, Mercury in plants and animal tissue by thermal decomposition-atomic spectrometry, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. O1-O5, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/O30TD-AAS_O.pdf#>.

    Hageman, Philip L., 2002, Mercury in water by flow injection-cold vapor-atomic fluorescence spectrometry, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. N1-N5, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/N13HagemanMercury_M.pdf#>.

    Hageman, Philip L., 2007, U.S. Geological Survey field leach test for assessing water reactivity and leaching potential of mine wastes, soils, and other geologic and environmental materials: Techniques of water resources investigations of the United States Geological Survey bk. 5, D-3, v, 14 p.: ill. (some col.); 28 cm, accessed November 2, 2009 at #<https://pubs.usgs.gov/tm/2007/05D03/#>.

    Hageman, Philip L., and Briggs, Paul H., 2000, A simple field leach test for rapid screening and qualitative characterization of mine waste dump material on abandoned mine lands: U.S. Geological Survey open-file report 00-15, 13 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr0015#>.

    Hageman, Philip L., and Welsch, Eric P., 1996, Arsenic, antimony, and selenium by flow injection or continuous flow-hydride generation-atomic absorption spectrophometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 24-30, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Hageman, Philip L., Brown, Zoe Ann, and Welsch, Eric P., 2002, Arsenic and selenium by flow injection or continuous flow-hydride generation-atomic absorption spectrophotometry, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. L1-L7, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/L06AS24Se_M.pdf#>.

    Harris, Carl M., Litteral, Charles J., and Damrau, Donna L.,, 1997, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : use of a modified ultrasonic nebulizer for the analysis of low ionic-strength water by inductively coupled optical emission spectrometry: U.S. Geological Survey open-file report 97-382, vi, 34 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://wwwnwql.cr.usgs.gov/Public/pubs/OFR97-382/text.html#>.

    Hatch, Joseph R., Bullock, John H., Jr., and Finkelman, Robert B., 2006, Chemical analyses of coal, coal-associated rocks and coal combustion products collected for the National Coal Quality Inventory: U.S. Geological Survey open-file report 2006-1162, Internet, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2006/1162/#>.

    Hauff, Phoebe L., and VanTrump, George, Jr., 1976, Laboratory manual : mineral x-ray diffraction data retrieval/plot computer program: U.S. Geological Survey open-file report 76-407, 55 p.: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr76407#>.

    Hauff, Phoebe L., Starkey, Harry C., Blackmon, Paul D., and Pevear, David R., 1984, Sample preparation procedures for the analysis of clay minerals by X-ray diffraction : a workshop syllabus prepared for the Denver X-ray Conference at Denver University, August 2, 1982: U.S. Geological Survey open-file report 82-934, ii, 63 p.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr82934#>.

    Hedley, Arthur G., and Fishman, Marvin J., 1981, Automation of an ion chromatograph for precipitation analysis with computerized data reduction: U.S. Geological Survey water resources investigations report 81-78, iv, 33 p.: ill.; 27 cm.

    Helz, Armin W., 1956, Rapid-scanning microphotometry: U.S. Geological Survey trace elements investigations report 579, 12 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei579#>.

    Helz, Armin W., 1964, A gas jet for d-c arc spectroscopy: U.S. Geological Survey professional paper 475-D; in "Geological Survey Research 1963", p. D176-D178, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp475D#>.

    Helz, Armin W., 1965, The problem of automatic plate reading and computer interpretation for spectrochemical analysis: U.S. Geological Survey professional paper 525-B; in "Geological Survey Research 1965", p. B160-B164, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp525B#>.

    Helz, Armin W., 1973, Spectrochemical computer analysis - Instrumentation: U.S. Geological Survey Journal of Research, vol 1, no 4, p. 475-482.

    Helz, Armin W., and Annell, Charles S., 1961, Determination of beryllium with a direct-reading spectrograph: U.S. Geological Survey professional paper 424-C; in "Geological Survey Research 1961", p. C380-C382.

    Helz, Armin W., Walthall, Frank G., and Berman, Sol, 1969, Computer analysis of photographed optical emission spectra: Applied Spectroscopy, vol 23, iss 5, 508-518.

    Hem, John D., 1960, Complexes of ferrous iron with tannic acid: U.S. Geological Survey water supply paper 1459-D; in "Chemistry of Iron in Natural Water", iii, 75-94 p.: ill.; 23 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1459D#>.

    Hem, John D., 1960, Restraints on dissolved ferrous iron imposed by bicarbonate redox potential, and pH: U.S. Geological Survey water supply paper 1459-B; in "Chemistry of Iron in Natural Water", iii, 55 p.: illus.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1459B#>.

    Hem, John D., 1960, Some chemical relationships among sulfur species and dissolved ferrous iron: U.S. Geological Survey water supply paper 1459-C; in "Chemistry of Iron in Natural Water", iii, 57-73 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1459C#>.

    Hem, John D., 1961, Calculation and use of ion activity: U.S. Geological Survey water supply paper 1535-C; in "Geochemistry of Water", iii, 17 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1535C#>.

    Hem, John D., 1963, Chemical equilibria and rates of manganese oxidation: U.S. Geological Survey water supply paper 1667-A; in "Chemistry of Manganese in Natural Water", iv, 64 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1667A#>.

    Hem, John D., 1964, Deposition and solution of manganese oxides: U.S. Geological Survey water supply paper 1667-B; in "Chemistry of Manganese in Natural Water", iv, 42 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1667B#>.

    Hem, John D., 1965, Reduction and complexing of manganese by gallic acids: U.S. Geological Survey water supply paper 1667-D; in "Chemistry of Manganese in Natural Water", iii, 28 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1667D#>.

    Hem, John D., 1968, Graphical methods for studies of aqueous aluminum hydroxide, fluoride, and sulfate complexes: U.S. Geological Survey water supply paper 1827-B; in "Chemistry of Aluminum in Natural Water", iv, 33 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1827B#>.

    Hem, John D., 1970, Study and interpretation of the chemical characteristics of natural water: U.S. Geological Survey water supply paper 1473, xiv, 363 p.: ill., maps; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1473#>.

    Hem, John D., 1985, Study and interpretation of the chemical characteristics of natural water: U.S. Geological Survey water supply paper 2254, xii, 263 p.: ill., maps; 28 cm, accessed November 2, 2009 at #<http://water.usgs.gov/pubs/wsp/wsp2254/#>.

    Hem, John D., and Cropper, William H., 1957, Chemistry of iron in natural water : a survey of chemical equilibria and redox potentials: , iii, 64 leaves: ill.; 27 cm.

    Hem, John D., and Cropper, William H., 1959, Survey of ferrous-ferric chemical equilibria and redox potentials: U.S. Geological Survey water supply paper 1459-A; in "Chemistry of Iron in Natural Water", iii, 31 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1459A#>.

    Hem, John D., and Roberson, Charles E., 1967, Form and stability of aluminum hydroxide complexes in dilute solution: U.S. Geological Survey water supply paper 1827-A; in "Chemistry of Aluminum in Natural Water", iv, 55 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1827A#>.

    Hem, John D., and Skougstad, Marvin W., 1960, Coprecipitation effects in solutions containing ferrous, ferric, and cupric ions: U.S. Geological Survey water supply paper 1459-E; in "Chemistry of Iron in Natural Water", 95-110 p.: ill.; 23 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1459E#>.

    Hem, John D., et al, 1973, Chemical interactions of aluminum with aqueous silica at 25 p0 sC: U.S. Geological Survey water supply paper 1827-E; in "Chemistry of Aluminum in Natural Water", iv, 57 p.; illus.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1827E#>.

    Heropoulos, Chris, Seeley, James L., and Radtke, Arthur S., 1984, Spectrographic determination of selenium in stibnite: Applied Spectroscopy, vol 38, iss 3, 451-454.

    Hillebrand, William F., 1900, Some principles and methods of rock analysis: U.S. Geological Survey bulletin 176, 114, xiii p.: ill., diagrs.; 24 cm.

    Hillebrand, William F., 1907, The analysis of silicate and carbonate rocks: U.S. Geological Survey bulletin 305, 200, ii p.; illus., diagrs. 23 cm.

    Hillebrand, William F., 1910, The analysis of silicate and carbonate rocks : a revision of Bulletin 305: U.S. Geological Survey bulletin 422, 200 p.: ill., diagrs.; 23 cm.

    Hillebrand, William F., 1919, The analysis of silicate and carbonate rocks: U.S. Geological Survey bulletin 700, 285 p.; illus., diagrs. 24 cm.

    Hillebrand, William F., and Allen, Eugene T., 1905, Comparison of a wet and crucible-fire methods for the assay of gold telluride ores, with notes on the errors occurring in the operations of fire assay and parting: U.S. Geological Survey bulletin 253, 31, iii p.: 24 cm.

    Hinkle, Margaret E., 1971, Determination of mercury in crude oils: U.S. Geological Survey professional paper 750-B; in "Geological Survey Research 1971", p. B171-174, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp750B#>.

    Hinkle, Margaret E., and Learned, Robert E., 1969, Determination of mercury in natural waters by collection on silver screens: U.S. Geological Survey professional paper 650-D; in "Geological Survey Research 1969", p. D251-D254, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp650D#>.

    Hinkle, Margaret E., Leong, Kam W., and Ward, Frederick N., 1965, Field determination of nanogram quantities of mercury in soils and rocks: U.S. Geological Survey open-file report 808, 14 leaves; 27 cm.

    Hinkle, Margaret E., Leong, Kam W., and Ward, Frederick N., 1966, Field determination of nanogram quantities of mercury in soils and rocks: U.S. Geological Survey professional paper 550-B; in "Geological Survey Research 1966", p. B135-B137.

    Hoffman, Gerald L., 1996, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : preparation procedure for aquatic biological material determined for trace metals: U.S. Geological Survey open-file report 96-362, vii, 42 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://nwql.usgs.gov/Public/pubs/OFR96-362/OFR96-362.html#>.

    Hoffman, Gerald L., Fishman, Marvin J., and Garbarino, John R., 1996, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : in-bottle acid digestion of whole-water samples: U.S. Geological Survey open-file report 96-225, vi, 28 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96225#>.

    Hoover, Donald B., Smith, David B., and Leinz, Reinhard W., 1997, CHIM, an electrogeochemical partial extraction method : an historical overview: U.S. Geological Survey open-file report 97-92, 27 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr9792#>.

    Hopkins, Delbert M., 1977, An improved ion-selective electrode method for the rapid determination of fluorine in rocks and soils: U.S. Geological Survey Journal of Research, vol 5, no 5, p. 589-593.

    Hosterman, John W., 1968, Use of the diffracted-beam monochromator in X-ray diffraction of clay minerals: U.S. Geological Survey professional paper 600-B; in "Geological Survey Research 1968", p. B117-B118.

    Hosterman, John W., Flanagan, Francis. J., Bragg, Anne, Doughten, Michael W., Filby, R. H., Grimm, Catherine, Mee, J. Steven, Potts, P. J., and Rogers, N. W., 1987, Mineralogy and instrumental neutron activation analysis of seven National Bureau of Standards and three Instituto de Pesquisas Tecnológicas clay reference samples: U.S. Geological Survey circular 957, iv, 38 p.: ill., map; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir957#>.

    Hoyte, Alfred F., 1957, A gamma-ray absorption method for the determination of uranium in ores: U.S. Geological Survey open-file report 431, 16 p..

    Hoyte, Alfred F., 1960, A gamma-ray absorption method for the determination of uranium in ores: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B504-B507.

    Hubert, Arthur E., 1971, A sensitive method for the determination of tellurium in vegetation: U.S. Geological Survey professional paper 750-D; in "Geological Survey Research 1971", p. D162-D164.

    Hubert, Arthur E., 1971, Determination of tellurium in geologic materials in the parts-per-billion range: U.S. Geological Survey professional paper 750-B; in "Geological Survey Research 1971", p. B188-B190, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp750B#>.

    Huffman, Claude, Jr., 1960, Water-soluble boron in sample containers: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B493-B494.

    Huffman, Claude, Jr., 1962, Ion-exchange separation and spectrophotometric determination of cadmium: U.S. Geological Survey professional paper 450-E; in "Geological Survey Research 1962", p. E126-E128, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp450E#>.

    Huffman, Claude, Jr., and Bartel, Ardith J., 1964, Ion-exchange separation of tin from silicate rocks: U.S. Geological Survey professional paper 501-D; in "Geological Survey Research 1964", p. D131-D133.

    Huffman, Claude, Jr., and Riley, Leonard B., 1956, Determination of uranium in the ash of plants and its precision: U.S. Geological Survey trace elements investigations report 654, 23 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei654#>.

    Huffman, Claude, Jr., and Riley, Leonard B., 1970, The fluorometric method - Its use and precision for determination of uranium in the ash of plants: U.S. Geological Survey professional paper 700-B; in "Geological Survey Research 1970", p. B181-B183.

    Huffman, Claude, Jr., and Skinner, Dwight L., 1961, Determination of copper in plant ash with neo-cuproine: U.S. Geological Survey professional paper 424-B; in "Geological Survey Research 1961", p. B331-B332.

    Huffman, Claude, Jr., Mensik, J.D., and Rader, Lewis F., Jr., 1966, Determination of silver in mineralized rocks by atomic-absorption spectrophotometry: U.S. Geological Survey professional paper 550-B; in "Geological Survey Research 1966", p. B189-B191.

    Huffman, Claude, Jr., Mensik, J.D., and Riley, Leonard B., 1967, Determination of gold in geologic materials by solvent extraction and atomic-absorption spectrometry: U.S. Geological Survey circular 544, iii, 6 p.; illus.; 26 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir544#>.

    Ingram, Blanche L., 1962, Spectrophotometric determination of fluorine with thoron: U.S. Geological Survey professional paper 450-E; in "Geological Survey Research 1962", p. E130, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp450E#>.

    Ingram, Blanche L., and May, Irving, 1971, Determining fluoride in rocks with a specific ion electrode: U.S. Geological Survey professional paper 750-B; in "Geological Survey Research 1971", p. B180-B184, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp750B#>.

    Jackson, Larry L., Brown, Floyd W., and Neil, Sara T., 1987, Major and minor elements requiring individual determination, classical whole rock analysis, and rapid rock analysis, in Methods for geochemical analysis: U.S. Geological Survey bulletin 1770-G, p. G1-G23.

    Jackson, Larry L., Engleman, Edythe E., and Peard, Janet L., 1984, Determination of total sulfur in lichens by combustion-infrared analysis: U.S. Geological Survey open-file report 84-656, 8 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr84656#>.

    Jackson, Larry L., Engleman, Edythe E., and Peard, Janet L., 1985, Determination of total sulfur in lichens and plants by combustion-infrared analysis: Environmental Science and Technology, vol 19, 437-441.

    Janzer, Victor J., 1983, Report of the U.S. Geological Survey's Analytical Evaluation Program : standard reference water samples M-82 (major constituents), T-83 (trace constituents), N-8 (nutrients), and P-2 (precipitation snowmelt): U.S. Geological Survey open-file report 83-864, 120 p.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr83864#>.

    Janzer, Victor J., 1985, Results of the U.S. Geological Survey's second International Interlaboratory Analytical Comparison Study : Standard Reference Water Samples M-86 (major constituents), T-87 (trace constituents), and P-5 (precipitation snowmelt): U.S. Geological Survey water resources investigations report 85-4049, iii, 85 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wri/wri854049#>.

    Janzer, Victor J., and Latal, Kristine A., 1984, Report of the U.S. Geological Survey's Analytical Evaluation Program--standard reference water samples M-86 (major constituents), T-87 (trace constituents), N-10 and N-11 (nutrients), P-5 (precipitation snowmelt), and POL-1 (priority pollutants): U.S. Geological Survey open-file report 84-128, 140 p.: 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr84128#>.

    Jenkins, Lillie B., 1954, The determination of potassium and sodium in siliceous, argillaceous, and phosphatic rocks by the flame photometer: U.S. Geological Survey trace elements investigations report 453, 17 p., 1 fig., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei453#>.

    Jenkins, Lillie B., 1983, A review of classical silicate-rock analysis and recommended modifications of classical methods of analysis: U.S. Geological Survey circular 864, iii, 34 p. :ill. ;26 cm., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir864#>.

    Jenkins, Lillie B., and Moore, Roosevelt, 1970, Determination of lead in rocks and minerals after extraction with diethylammonium diethyldithiocarbamate: U.S. Geological Survey professional paper 700-D; in "Geological Survey Research 1970", p. D222-D224.

    Johnson, Jesse O., 1971, Determination of radium-228 in natural waters: U.S. Geological Survey water supply paper 1696-G; in "Radiochemical Analysis of Water", iii, 26 p.; illus.; 23 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1696G#>.

    Johnson, Jesse O., and Edwards, Kenneth W., 1966, Determination of lead-210 in water: U.S. Geological Survey open-file report 66-70, 15 leaves: ill.; 28 cm.

    Johnson, Jesse O., and Edwards, Kenneth W., 1967, Determination of strontium-90 in water: U.S. Geological Survey water supply paper 1696-E; in "Radiochemical Analysis of Water", iii, 10 p.: ill.; 23 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1696E#>.

    Johnson, Robert G., 1984, Trace element analysis of silicates by means of energy-dispersive X-ray spectrometry: X-ray Spectrometry, vol 13, iss 2, 64-68.

    Johnson, Robert G., and King, Bi-Shia L., 1987, Energy-dispersive X-ray fluorescence spectrometry, in Methods for geochemical analysis: U.S. Geological Survey bulletin 1770-F, F1-F5.

    Jones, Sandra R., and Garbarino, John R., 1999, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of arsenic and selenium in water and sediment by graphite furnace atomic absorption spectrometry: U.S. Geological Survey open-file report 98-639, viii, 39 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr98639#>.

    Jones, Sandra R., and McLain, Betty J., 1997, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of molybdenum in water by graphite furnace atomic absorption spectrophotometry: U.S. Geological Survey open-file report 97-198, vi, 25 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr97198#>.

    Kane, Jean S., 1979, Determination of nanogram amounts of bismuth in rocks by atomic absorption spectrometry with electrothermal atomization: Analytica Chimica Acta, vol 106, 325-331.

    Kane, Jean S., 1979, DEV1, a Fortran program for one-way analysis of variance of analytical data: U.S. Geological Survey open-file report 79-282, 18 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr79282#>.

    Kane, Jean S., 1985, The inductively coupled plasma spectrometric method for the determination of six indicator elements for mineralization processes in granites: Geostandards Newsletter, vol 9, iss 2, 181-190.

    Kane, Jean S., 1987, The U.S. Geological Survey instrument for simultaneous multi- element atomic absorption spectrometry : description of the hardware and of the system control and data aquisition software: U.S. Geological Survey open-file report 87-604, 54 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr87604#>.

    Kane, Jean S., 1993, The USGS reference sample Devonian Ohio Shale SDO-1: U.S. Geological Survey bulletin 2046, 1 v. (various pagings): ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b2046#>.

    Kellagher, Richard C., 1953, A multiple cone splitter for rapid sampling in the laboratory: U.S. Geological Survey trace elements investigations report 371, 14 leaves: ill. ; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei371#>.

    Kellagher, Richard C., and Flanagan, Francis J., 1955, A comparison of two methods for converting grain counts to weight percent composition: U.S. Geological Survey trace elements investigations report 497, 15 leaves: ill.; 27 cm.

    Kennedy, Kay R., and Crock, James G., 1987, Determination of mercury in geological materials by continuous-flow, cold-vapor, atomic spectrophotometry: Analytical Letters, vol 20, 899-908.

    Kepferle, Roy C., De Witt, Wallace, and Flanagan, Francis J., 1985, Ohio shale (Devonian), SDO-1 from Rowan County, Kentucky: U.S. Geological Survey open-file report 85-145, 12 leaves: ill., map; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr85145#>.

    Keys, W. Scott, Senftle, Frank E., and Tanner, Allan B., 1979, Use of NaI (Tl) and germanium detectors for in situ x-ray spectral monitoring of boreholes at nuclear waste-disposal sites: U.S. Geological Survey open-file report 79-1220, 21 leaves: graphs, ill., map; 28 cm.

    King, Bi-Shia L., 1996, Twelve selected trace elements by energy-dispersive X-ray fluorescence spectrometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 228-235, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Kinser, Charles A., 1953, The Model VI transmission fluorimeter for the determination of uranium: U.S. Geological Survey trace elements investigations report 2370, 20 p., 5 fig., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei370#>.

    Kinser, Charles A., 1954, The Model VI transmission fluorimeter for the determination of uranium: U.S. Geological Survey Circular 330, 9 p. :ill. ;27 cm., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir330#>.

    Kirschenbaum, Herbert, 1981, A manual of modified analytical procedures for conventional rock analysis: U.S. Geological Survey open-file report 81-359, v, 78 leaves; 28 cm.

    Kirschenbaum, Herbert, 1983, The classical chemical analysis of silicate rocks - The old and the new: U.S. Geological Survey bulletin 1547, 55 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1547#>.

    Kirschenbaum, Herbert, 1988, The determination of fluoride in silicate rocks by ion-selective electrode: U.S. Geological Survey open-file report 88-588, 5 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr88588#>.

    Klock, Paul R., and Lamothe, Paul J., 1984, Modification of a carbon-hydrogen-nitrogen analyzer for reduction of instrument background: U.S. Geological Survey open-file report 84-489, [5] leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr84489#>.

    Knight, Roy J., and McKown, David M., 1996, Uranium and thorium by delayed neutron counting, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 206-210, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Knight, Roy J., and McKown, David M., 2002, Uranium and thorium by delayed neutron counting, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. Z1-Z5, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/Z26UThDN_M.pdf#>.

    Lakin, Hubert W., Almond, Hy, and Ward, Frederick N., 1951, Compilation of field tests used in geochemical prospecting by the U.S. Geological Survey: U.S. Geological Survey open-file report 84, 83 leaves; 29 cm.

    Lakin, Hubert W., Almond, Hy, and Ward, Frederick N., 1952, Compilation of field tests used in geochemical prospecting by the U.S. Geological Survey: U.S. Geological Survey circular 161, i, 34 p.: ill.; 27 cm.

    Lakin, Hubert W., and Nakagawa, Harry N., 1965, A spectrophotometric method for the determination of gold useful in mineral exploration: U.S. Geological Survey open-file report 800, 12 leaves; 27 cm.

    Lakin, Hubert W., and Nakagawa, Harry N., 1965, A spectrophotometric method for the determination of gold useful in mineral exploration: U.S. Geological Survey professional paper 525-C; in "Geological Survey Research 1965", p. C168-C171.

    Lakin, Hubert W., and Thompson, Charles E., 1963, Effect of copper on the precipitation of tellurium with hypophosphorus acid using selenium or gold as a collector: U.S. Geological Survey professional paper 450-E; in "Geological Survey Research 1962", p. E128-E129, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp450E#>.

    Lakin, Hubert W., Curtin, Gary C., Hubert, Arthur E., Shacklette, Hansford T., and Doxtader, Kenneth G., 1974, Geochemistry of gold in the weathering cycle : a study of the solubilization of gold by the formation of chloride, bromide, iodide, thiosulfate, thiocyanide, and cyanide gold complexes and related topics: U.S. Geological Survey bulletin 1330, vi, 80 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1330#>.

    Lamar, William L., 1965, Identification and measurement of chlorinated organic pesticides in water by electron-capture gas chromatography: U.S. Geological Survey water supply paper 1817-B; in "Organic Substances in Water", iii, 12 p.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1817B#>.

    Lamar, William L., Goerlitz, Donald F., 1966, Organic acids in naturally colored surface waters: U.S. Geological Survey water supply paper 1817-A; in "Organic Substances in Water", iii, 17 p.: ill.; 23 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1817A#>.

    Lamar, William L., Goerlitz, Donald F., and Law, LeRoy M., 1964, Detection and measurement of chlorinated organic pesticides in water by electron capture gas chromatography: U.S. Geological Survey open-file report, 19 p.: ill.; 27 cm.

    Lamothe, Paul J., Fries, Terry L., and Consul, Jerry J., 1986, A microwave-oven system for the dissolution of geologic samples: U.S. Geological Survey open-file report 86-189, 19 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr86189#>.

    Lamothe, Paul J., Meier, Allen L., and Wilson, Stephen A., 1999, The determination of forty four elements in aqueous samples by inductively coupled plasma-mass spectrometry: U.S. Geological Survey open-file report 99-151, 14 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr99151#>.

    Lamothe, Paul J., Meier, Allen L., and Wilson, Stephen A., 2002, The determination of forty elements in aqueous samples by inductively coupled plasma-mass spectrometry, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. H1-H11, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/H21&23OFR99-151_M.pdf#>.

    Layman, Lawrence R., and Lichte, Frederick E., 1982, Design and implementation of an auto-profiling system for spectrometers using ICP excitation: ICP Newsletter, vol 7, iss 11, 565.

    Leary, J.J., Brookes, A.E., Dorrzapf, Anthony F., Jr., and Golightly, Danold W., 1982, An objective function for optimization techniques in simultaneous multiple-element analysis by inductively plasma spectrometry: Applied Spectroscopy, vol 36, 37-40.

    Leinz, Reini W., and Grimes, David J., 1978, Spectrochemical determination of submicrogram amounts of tungsten in geologic materials: U.S. Geological Survey Journal of Research, vol 6, no2, p. 259-262.

    Leventhal, Joel S., Crock, James G., Mountjoy, Wayne, Thomas, James A., Shale, V. E., Briggs, Paul H., Wahlberg, James S., and Malcolm, Mollie J., 1978, Preliminary analytical results for a new U.S. Geological Survey Devonian Ohio Shale Standard SDO-1: U.S. Geological Survey open-file report 78-447, [4], 11 leaves ;28 cm.; (13 sheets - PGS).

    Levine, Harry, and Grimaldi, Frank S., 1949, Application of Mesityl Oxide to the determination of Thorium: U.S. Geological Survey trace elements investigations report 105, 36 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei105#>.

    Levine, Harry, and Grimaldi, Frank S., 1957, Determination of thorium in the parts per million range in rocks: U.S. Geological Survey trace elements investigations report 692, 11 leaves; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei692#>.

    Levine, Harry, Rowe, Jack J., and Grimaldi, Frank S., 1953, The molybdenum blue reaction and the determination of phosphorus in waters containing arsenic, silicon, and germanium: U.S. Geological Survey trace elements investigations report 379, 26 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei379#>.

    Lichte, Frederick E., Golightly, Danold W., and Lamothe, Paul J., 1987, Inductively coupled plasma-atomic emission spectrometry, in Methods for geochemical analysis: U.S. Geological Survey bulletin 1770-B, p. B1-B10.

    Lichte, Frederick E., Meier, Allen L., and Crock, James G., 1987, Determination of the rare earth elements in geological materials by inductively coupled plasma-mass spectrometry: Analytical Chemistry, vol 59, iss 8, 1150-1157.

    Lillie, E.G., and Greenland, L. Paul, 1973, Spectrophotometric determination of tungsten in rocks by an isotope dilution procedure: U.S. Geological Survey Journal of Research, vol 1, no 5, p. 555-558.

    Lind, C. J., 1983, Characterization of mineral precipitates by electron microscope photographs and electron diffraction patterns: U.S. Geological Survey water supply paper 2204, iv, 18 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp2204#>.

    Lind, C. J., and Hem, John D., 1975, Effects of organic solutes on chemical reactions of aluminum: U.S. Geological Survey water supply paper 1827-G; in "Chemistry of Aluminum in Natural Water", v, 83 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1827G#>.

    Lindley, Chris E., Burkhardt, Mark R., and DeRusseau, Sabrina N., 1994, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : extraction of nitroaromatic compounds from water by polystyrene divinylbenzene cartridge and determination by high-performance liquid chromatography: U.S. Geological Survey open-file report 94-62, iv, 15 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr9462#>.

    Marinenko, John, 1974, Thermal conductimetric determination of submilligram amounts of total water in silicate and carbonate minerals: U.S. Geological Survey Journal of Research, vol 2, no 2, p. 185-188.

    Marinenko, John, and May, Irving, 1970, Gas chromatographic determination of carbonate carbon in rocks and minerals: U.S. Geological Survey professional paper 700-D; in "Geological Survey Research 1970", p. D103-D105.

    Marinenko, John, and Mei, Leung, 1974, Spectrophotometric determination of vanadium in rutile and in mafic rocks: U.S. Geological Survey Journal of Research, vol 2, no 6, p. 701-704.

    May, Irving, and Cuttitta, Frank, 1961, Completeness of precipitation of selenium as the element: U.S. Geological Survey professional paper 424-D; in "Geological Survey Research 1961", p. D394-D395.

    May, Irving, and Fletcher, Mary H., 1948, A preliminary report on a transmission fluorimeter: U.S. Geological Survey trace elements investigations report 91, 7 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei91#>.

    May, Irving, and Fletcher, Mary H., 1950, A battery-powered fluorimeter for the determination of uranium: U.S. Geological Survey trace elements investigations report 135, 9 leaves, [5] leaves of plates: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei135#>.

    May, Irving, and Jenkins, Lillie B., 1965, Use of arsenazo III in determination of thorium in rocks and minerals: U.S. Geological Survey professional paper 525-D; in "Geological Survey Research 1965", p. D192-D195.

    May, Irving, and Smith, Roberta K., 1955, Separation of aluminum phosphate minerals from kaolinite by selective solution: U.S. Geological Survey trace elements investigations report 556, 8 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei556#>.

    May, Irving, Dinnin, Joseph I., and Rosenbaum, Fred, 1964, A simple oxygen sheath for flame photometry: U.S. Geological Survey professional paper 501-C; in "Geological Survey Research 1964", p. C152-C153.

    May, Irving, Rowe, Jack James, and Letner, Raymond, 1965, A platinum-lined bomb for the high temperature decomposition of refractory minerals: U.S. Geological Survey professional paper 525-B; in "Geological Survey Research 1965", p. B165-B166, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp525B#>.

    May, Irving, Schnepfe, Marian M., and Naeser, Charles R., 1960, Strontium sorption studies on crandallite: U.S. Geological Survey trace elements investigations report 819, 27 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei819#>.

    May, Irving, Schnepfe, Marian M., and Naeser, Charles R., 1963, Strontium sorption studies on crandallite: U.S. Geological Survey bulletin 1144-C; in "Contributions to Geochemistry", 17 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1144C#>.

    McCarthy, J. Howard, Jr., Lovering, Thomas S., and Lakin, Hubert W., 1961, Density comparison method for the determination of O18/O16 ratios in prepared waters: U.S. Geological Survey professional paper 424-C; in "Geological Survey Research 1961", p. C387-C389.

    McCarthy, J. Howard, Jr., Lovering, Thomas S., and Lakin, Hubert W., 1965, Density comparison method for the measurement of isotopic variations in prepared waters: U.S. Geological Survey open-file report 797, 38 leaves: ill.; 28 cm.

    McHugh, John B., 1979, Portable field kit for determining uranium in water: U.S. Geological Survey open-file report 79-429, 14 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr79429#>.

    McHugh, John B., and Turner, James H., 1979, Indirect determination of chloride in plants by atomic absorption spectrophotometry: U.S. Geological Survey professional paper 1129-F; in "Shorter Contributions to Geochemistry", p. F1-F3.

    McKown, David M., and Millard, Hugh T., Jr., 1987, Determination of uranium and thorium by delayed neutron counting, in Methods for geochemical analysis: U.S. Geological Survey bulletin 1770-I, I1-I12.

    McLain, Betty J., 1993, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of chromium in water by graphite furnace atomic absorption spectrophotometry: U.S. Geological Survey open-file report 93-449, v, 16 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr93449#>.

    Mead, Cynthia W., and Mrose, Mary E., 1968, Solving problems in phosphate mineralogy with the electron probe: U.S. Geological Survey professional paper 600-D; in "Geological Survey Research 1968", p. D204-D206, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp600D#>.

    Mee, J. Steven, Siems, David F., and Taggart, Joseph E., 1996, Major element analysis by wavelength dispersive X-ray fluorescence spectrometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 236-242, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Meier, Allen L., 1976, Analytical methods and problems of lithium determination in rocks, sediments and brines, in Vine, J.D., ed., Lithium resources and requirements by the year 2000: U.S. Geological Survey professional paper 1005, p. 161-162.

    Meier, Allen L., 1979, A technique for decomposition and dissolution of rocks for the determination of lithium, calcium and magnesium by atomic absorption: U.S. Geological Survey professional paper 1129-I; in "Shorter Contributions to Geochemistry", p. I1-I5.

    Meier, Allen L., 1980, Flameless atomic-absorption determination of gold in geological materials: Journal of Geochemical Exploration, vol 13, 77-85.

    Meier, Allen L., and Bigelow, Robert C., 1984, AFS DETECTION LIMITS : listing and explanation of a computer program for the Baird Plasma/AFS and Apple II computer to determine detection limits: U.S. Geological Survey open-file report 84-698, 21 p.: 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr84698#>.

    Meier, Allen L., and Lichte, Frederick E., 1996, Rare earth elements by inductively coupled plasma-mass spectrometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 166-172, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Meier, Allen L., and Slowik, Tara, 2002, Rare earth elements by inductively coupled plasma-mass spectrometry, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. K1-K8, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/K19NewREE_M.pdf#>.

    Meier, Allen L., Carlson, Robert R., Lichte, Frederick E., and Bullock, John H., Jr., 1996, Platinum group elements by nickel sulfide fire assay separation and inductively coupled plasma-mass spectrometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 158-165, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Meier, Allen L., Lichte, Frederick E., Briggs, Paul H., and Bullock, John H., Jr., 1996, Coal ash by inductively coupled plasma-atomic emission spectrometry and inductively coupled plasma-mass spectrometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 109-125, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Meyrowitz, Robert, 1969, The direct microdetermination of silicon and aluminum in silicate minerals: U.S. Geological Survey professional paper 650-B; in "Geological Survey Research 1969", p. B136-B139, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp650B#>.

    Meyrowitz, Robert, 1970, A microprocedure for the determination of carbon dioxide in minerals: U.S. Geological Survey professional paper 700-C; in "Geological Survey Research 1970", p. C183-C185.

    Meyrowitz, Robert, 1970, A pyrocatechol violet spectrophometric procedure for the direct microdetermination of aluminum in silicate minerals: U.S. Geological Survey professional paper 700-D; in "Geological Survey Research 1970", p. D225-D229.

    Meyrowitz, Robert, 1971, Chemical analysis of sphene - Spectrophotometric determination of silicon, aluminum, titanium, total iron, and phosphorus: U.S. Geological Survey professional paper 750-B; in "Geological Survey Research 1971", p. B165-B170, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp750B#>.

    Meyrowitz, Robert, 1973, Chemical analysis of rutile - A pyrocatechol violet spectrophotometric procedure for the direct micro-determination of zirconium: U.S. Geological Survey Journal of Research, vol 1, no 5, p. 549-554.

    Meyrowitz, Robert, 1973, The microgravimetric determination of acid-insoluble impurities in the complete analysis of small samples of acid-soluble minerals: U.S. Geological Survey Journal of Research, vol 1, no 2, p. 207-210.

    Meyrowitz, Robert, and Massoni, Camillo J., 1954, An automatic micromuffle for the determination of ash in carbonaceous material: U.S. Geological Survey trace elements investigations report 412, 7 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei412#>.

    Miesch, Alfred T., Barnett, Paul R., Bartel, Ardith J., Dinnin, Joseph I., Feder, G. L., Harms, Thelma F., Huffman, Claude, Jr., Janzer, V. J., Millard, Hugh T., Jr., Neiman, Harold G., Skougstad, M. W., Wahlberg and James. S., 1976, Methods of sampling, laboratory analysis, and statistical reduction of data, in Geochemical survey of Missouri: U.S. Geological Survey professional paper 954-A, 38 p..

    Milkey, Robert G., 1952, A theoretical treatment of the absorption characteristics of the dithizone mixed-color system: U.S. Geological Survey trace elements investigations report 236, 12 p. : ill. ; 27 cm., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei236#>.

    Milkey, Robert G., and Fletcher, Mary H., 1956, A fluorimetric study of the thorium-morin system: U.S. Geological Survey trace elements investigations report 589, 56 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei589#>.

    Millard, Hugh T., Jr., and Keaten, B.A., 1982, Precision of uranium and thorium determinatons by delayed neutron counting: Journal of Radioanalytical Chemistry, vol 72, iss 1-2, 489-500.

    Millard, Hugh T., Jr., and Maat, Paula B., 1994, Thermoluminescence dating procedures in use at the U.S. Geological Survey, Denver, Colorado: U.S. Geological Survey open-file report 94-249, iv, 112 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr94249#>.

    Millard, Hugh T., Jr., Marinenko, John, and McLane, John E., 1969, Establishment of gold-quartz standard GQS-1: U.S. Geological Survey circular 598, iii, 6 p.; 26 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir598#>.

    Moreland, John and Myers, Alfred T., 1973, Notes on use and maintenance of vertical pulverizers for geologic materials: U.S. Geological Survey open-file report 1762, 6 leaves :ill. ;27 cm.; 12 p..

    Mosier, Elwin L., Antweiler, John C., and Nishi, James M., 1975, Spectrochemical determination of trace elements in galena: U.S. Geological Survey Journal of Research, vol 3, no 5, p. 625-630.

    Mossotti, Victor G., and King, Bi-Shia L., 1982, The determination of total volatiles in rocks by loss-on-fusion: U.S. Geological Survey open-file report 82-587, 19 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr82587#>.

    Motooka, Jerry M., 1988, An exploration geochemical technique for the determination of preconcentrated organometallic halides by ICP-AES: Applied Spectroscopy, vol 42, iss 7, 1293-1296.

    Motooka, Jerry M., 1996, Organometallic halide extraction for 10 elements by inductively coupled plasma-atomic emission spectrometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 102-108, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Motooka, Jerry M., and Grimes, David J., 1976, Analytical precision of one-sixth order semiquantitative spectrographic analysis: U.S. Geological Survey circular 738, iii, 25 p.: graphs; 26 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir738#>.

    Mountjoy, Wayne, 1970, Determination of cobalt in geologic materials by solvent extraction and atomic absorption spectrometry: U.S. Geological Survey professional paper 700-B; in "Geological Survey Research 1970", p. B174-B176.

    Mountjoy, Wayne, and Lipp, H.H., 1961, Some factors affecting the determination of beryllium by the gamma-ray activation method: U.S. Geological Survey professional paper 424-C; in "Geological Survey Research 1961", p. C379-C380.

    Mountjoy, Wayne, and Wahlberg, James S., 1968, Determination of micro amounts of cesium in geologic materials: U.S. Geological Survey professional paper 600-B; in "Geological Survey Research 1968", p. B119-B122.

    Moxham, Robert M., 1958, Airborne radioactivity surveys in geologic exploration: U.S. Geological Survey trace elements investigations report 662, 49 leaves: ill., maps; 27 cm.

    Moxham, Robert M., and Tanner, Allan B., 1976, High-resolution gamma-ray spectrometry in uranium exploration: U.S. Geological Survey open-file report 76-399, 1 v. (various pagings): ill.; 28 cm.

    Myers, Alfred T., and Barnett, Paul R., 1952, Contamination of rock samples during grinding as determined spectrographically: U.S. Geological Survey trace elements investigations report 179, 31 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei179#>.

    Myers, Alfred T., Havens, Raymond G. and Dunton, P.J., 1961, A spectrochemical method for the semiquantitative analysis of rocks, minerals, and ores: U.S. Geological Survey bulletin 1084-I, in "Contributions to Geochemistry", p. iii, 207-229; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1084I#>.

    Myers, Alfred T., Havens, Roy G., Connor, Jon J., Conklin, Nancy M. and Rose, Harry J., Jr., 1976, Glass reference standards for the trace-element analysis of geological materials; compilation of interlaboratory data: U.S. Geological Survey professional paper 1013, 29 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp1013#>.

    Naeser, Charles W., 1976, Fission track dating: U.S. Geological Survey open-file report 76-190, 68 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr76190#>.

    Naeser, Charles W., and Cebula, Gerald T., 1978, Fission-track dating of apatite and zircon : an interlaboratory comparison: U.S. Geological Survey open-file report 78-108, 12 leaves: 27 cm.

    Naeser, Charles W., Izett, Glen A., and Obradovich, John D., 1980, Fission-track and K-Ar ages of natural glasses: U.S. Geological Survey bulletin 1489, 31 p.: ill.; 23 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1489#>.

    Nakagawa, Harry N., and Harms, Thelma F., 1968, Atomic absorption determination of cadmium in geologic materials: U.S. Geological Survey professional paper 600-D; in "Geological Survey Research 1968", p. D207-D209, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp600D#>.

    Nakagawa, Harry N., and Lakin, Hubert W., 1965, A field method for the determination of silver in soils and rocks: U.S. Geological Survey open-file report 785, 13 leaves; 27 cm.

    Nakagawa, Harry N., and Lakin, Hubert W., 1965, A field method for the determination of silver in soils and rocks: U.S. Geological Survey professional paper 525-C; in "Geological Survey Research 1965", p. C172-C175.

    Nakagawa, Harry N., and Thompson, Charles E., 1968, Atomic absorption determination of tellurium: U.S. Geological Survey professional paper 600-B; in "Geological Survey Research 1968", p. B123-B125.

    Nichols, Martha L., and Friedman, Linda C., 1991, National Research Program of the Water Resources Division, U.S. Geological Survey, fiscal year 1991: U.S. Geological Survey open-file report 92-38, iii, 313 p.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr9238#>.

    Nichols, Martha L., and Friedman, Linda C., 1993, National Research Program of the Water Resources Division, U.S. Geological Survey, fiscal year 1992: U.S. Geological Survey open-file report 93-128, viii, 392 p.; 28 cm.

    Nichols, Martha L., and Friedman, Linda C., 1995, National Research Program of the Water Resources Division, U.S. Geological Survey, fiscal year 1993: U.S. Geological Survey open-file report 95-125, viii, 435 p.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr95125#>.

    Niles, William W., 1964, Determination of total iron in hematitic iron ores by X-ray fluorescence spectrometry: U.S. Geological Survey professional paper 475-D; in "Geological Survey Research 1963", p. D174-D175, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp475D#>.

    Norton, Daniel R., and Papp, Clara S.E., 1996, Moisture and total water in silicate rocks, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 67-76, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Nowlan, Gary A., 1965, Use of bathocuproine in the quantitative determination of copper in soils, sediments and rocks: U.S. Geological Survey professional paper 525-D; in "Geological Survey Research 1965", p. D189-D191.

    Nowlan, Gary A., 1970, A field method for the determination of cold-extractable nickel in stream sediments and soils: U.S. Geological Survey professional paper 700-B; in "Geological Survey Research 1970", p. B177-B180.

    Oborn, Eugene T., and Hem, John D., 1961, Microbiologic factors in the solution and transport of iron: U.S. Geological Survey water supply paper 1459-H; in "Chemistry of Iron in Natural Water", iii, p. 213-235: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1459H#>.

    Oborn, Eugene T., and Hem, John D., 1962, Some effects of the larger types of aquatic vegetation on iron content of water: U.S. Geological Survey water supply paper 1459-I; in "Chemistry of Iron in Natural Water", iv, 237-268 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1459I># Oda, Uteana, Myers, Alfred T., and Cooley, Elmo F., 1959, A field method of spectrographic analysis for use in geochemical exploration work: U.S. Geological Survey open-file report 472, 8 leaves; 27 cm.

    O'Leary, Richard M., 1996, Cadmium and silver by flame atomic absorption spectrometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 56-59, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    O'Leary, Richard M., 1996, Mercury in whole coal and biological tissue by continuous flow-cold vapor-atomic absorption spectrometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 51-55, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    O'Leary, Richard M., 1996, Tellurium and thallium by flame atomic absorption spectrometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 37-41, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    O'Leary, Richard M., and Meier, Allen L., 1986, Analytical methods used in geochemical exploration, 1984: U.S. Geological Survey circular 948, iii, 48 p.: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir948#>.

    O'Leary, Richard M., and Meier, Allen L., 1996, Gold by flame or graphite furnace atomic absorption spectrometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 31-36, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    O'Leary, Richard M., and Viets, John G., 1986, Determination of antimony, arsenic, bismuth, cadmium, copper, lead, molybdenum, silver, and zinc in geological materials by atomic absorption spectrometry using a hydrochloric acid-hydrogen peroxide digestion: Atomic Spectroscopy, vol 7, 4-8.

    O'Leary, Richard M., Hageman, Philip L., and Crock, James G., 1996, Mercury in water, geologic, and plant materials by continuous flow-cold vapor-atomic absorption spectrometry, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 42-50, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Palmer, Curtis A., and Walthall, Frank G., editors, 1992, The Chemical analysis of argonne premium coal samples: U.S. Geological Survey open-file report 91-638, 12 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr91638#>.

    Palmer, Curtis A., editor, 1997, The chemical analysis of Argonne Premium Coal samples: U.S. Geological Survey bulletin 2144, iv, 106 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://energy.er.usgs.gov/products/papers/b2144/index.htm#>.

    Palmer, Curtis A., et al, 1999, Preliminary report on the International Energy Agency mode of occurrence inter-laboratory comparison, phase I : USGS results: U.S. Geological Survey open-file report 99-160, 48 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr99160#>.

    Papp, Clara S.E., Aruscavage, Philip J., and Brandt, Elaine L., 1996, Ferrous oxide by potentiometric titration, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 200-205, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Papp, Clara S.E., Brandt, Elaine L., and Aruscavage, Philip J., 1996, Carbonate carbon by coulometric titration, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 60-66, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Papp, Clara S.E., Filipek, Loraine H., and Smith, Kathleen S., 1991, Selectivity and effectiveness of extractants used to release metals associated with organic matter: Applied Geochemistry, vol 6, 349-353.

    Parshall, Ernest E., and Rader, Lewis F., Jr., 1955, Diagrams for construction of model '54 transmission and reflection fluorimeter: U.S. Geological Survey open-file report 351, [3] leaves: 8 ill. (some folded); 28 cm.

    Parshall, Ernest E., and Rader, Lewis F., Jr., 1955, The model '54 transmission and reflection fluorimeter for the determination of uranium, with adaptation to field use: U.S. Geological Survey trace elements investigations report 520, 48 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei520#>.

    Parshall, Ernest E., and Rader, Lewis F., Jr., 1957, Model '54 transmission and reflection fluorimeter for determination of uranium with adaptation to field use: U.S. Geological Survey bulletin 1084-M; in "Contributions to Geochemistry", p. iii, 221-251: ill., map (fold. in pocket); 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1036M#>.

    Patten, Lorraine E., and Ward, Frederick N., 1962, Geochemical field method for beryllium prospecting: U.S. Geological Survey professional paper 450-C; in "Geological Survey Research 1962", p. C103-C104.

    Patton, Charles J., and Kryskalla, Jennifer R., 2003, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : evaluation of alkaline persulfate digestion as an alternative to Kjeldahl digestion for determination of total and dissolved nitrogen and phosphorus in water: U.S. Geological Survey water resources investigations report 03-4174, vi, 33 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://nwql.usgs.gov/Public/pubs/WRIR03-4174/WRIR03-4174.html#>.

    Patton, Charles J., and Truitt, Earl P., 1992, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory -- determination of the total phosphorus by a Kjeldahl digestion method and an automated colorimetric finish that includes dialysis: U.S. Geological Survey open-file report 92-146, vii, 39 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://nwql.usgs.gov/Public/pubs/OFR92-146/OFR92-146.html#>.

    Patton, Charles J., and Truitt, Earl P., 2000, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of ammonium plus organic nitrogen by a Kjeldahl digestion method and an automated photometric finish that includes digest cleanup by gas diffusion: U.S. Geological Survey open-file report 00-170, v, 31 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://wwwnwql.cr.usgs.gov/Public/pubs/OFR00-170/OFR00-170.html#>.

    Peacock, Thomas R., 1992, The preparation of plant material and determination of weight percent ash: U.S. Geological Survey open-file report 92-345, 9 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr92345#>.

    Peacock, Thomas R., 1996, The preparation of plant material and determination of weight percent ash; in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 20-23, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Peacock, Thomas R., and Crock, James G., 2002, Plant material preparation and determination of weight percent ash, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. B1-B4, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/B17PlantAsh_M.pdf#>.

    Peck, Lee C., 1964, Systematic analysis of silicates: U.S. Geological Survey bulletin 1170, iv, 89 p.: ill.; 24 cm.

    Peck, Lee C., and Smith, Vertie C., 1961, Removal of manganese from solutions prior to determination of calcium and magnesium: U.S. Geological Survey professional paper 424-D; in "Geological Survey Research 1961", p. D401-D402.

    Peterman, Zell E., and Schnabel, Diane C., 1986, Shorter contributions to isotope research: U.S. Geological Survey bulletin 1622, iv, 22l p.: ill., maps; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1622#>.

    Peterman, Zell E., Doe, Bruce R., and Bartel, Ardith J., 1967, Data on the rock GSP-1 (granodiorite) and the isotope-dilution method of analysis for Rb and Sr: U.S. Geological Survey professional paper 575-B; in "Geological Survey Research 1967", p. B181-B185.

    Phair, George, and Levine, Harry, 1952, Notes on the differential leaching of uranium, radium, and lead from pitchblende in H?SO? Solutions: U.S. Geological Survey trace elements investigations report 262, 23 p. ; 28 cm., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei262#>.

    Phillips, Richard E., and Hauff, Phoebe L., 1982, USGS Mineralogy Laboratory user's guide to the TECO editing program for the DEC RT-11 operating system : (Part C of the USGS Mineralogy Laboratory user's guide to the DEC RT-11 operating system): U.S. Geological Survey open-file report 82-177, ii, 39 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr82177#>.

    Philpotts, John A., 1987, Isotope-dilution mass spectrometry, in Methods for geochemical analysis: U.S. Geological Survey bulletin 1770-K, K1-K5.

    Pietsch, Audrey, and Grimaldi, Frank S., 1952, The fluorimetric determination of uranium in nonsaline and saline waters: U.S. Geological Survey trace elements investigations report 181, 20 leaves; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei181#>.

    Powell, R. A. and Kinser, Charles A., 1956, A dithizone method for the determination of lead in monazite: U.S. Geological Survey trace elements investigations report 630, 18 p., 1 fig., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei630#>.

    Pribble, Sarah T., 1996, Fluoride in silicates by ion-selective electrode following LiBO2 fusion and HNO3 dissolution, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 195-199, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Rader, Lloyd F., and Grimaldi, Frank S., 1961, Chemical analyses for selected minor elements in Pierre Shale: U.S. Geological Survey professional paper 391-A; in "Analytical Methods in Geochemical Investigations of the Pierre Shale", 45 p.; illus.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp391A#>.

    Rader, Lloyd F., Swadley, W.C., Lipp, H.H., and Huffman, Claude, Jr., 1960, Determination of zinc in basalts and other rocks: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B477-B480.

    Rainwater, Frank H., and Thatcher, Leland L., 1960, Methods for collection and analysis of water samples: U.S. Geological Survey water supply paper 1454, ix, 301 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1454#>.

    Rait, Norma, Walthall, Frank G., and Philpotts, John A., 1993, Abundances of Li, Rb, and Sr in W-2, BCR-1, and AC-E determined by isotope dilution mass spectroscopy: U.S. Geological Survey open-file report 93-267, 6 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr93267#>.

    Randolph, Robert B., and Grimaldi, Frank. S., 1949, The determination of phosphorus in rocks containing vanadium: U.S. Geological Survey trace elements investigations report 99, 12 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei99#>.

    Reichen, Laura E., 1971, Determination of sulfur in pyritic rocks by a single precipitation of barium sulfate after nitrate fusion: U.S. Geological Survey professional paper 750-B; in "Geological Survey Research 1971", p. B163-B164, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp750B#>.

    Reichen, Laura E., and Fahey, Joseph J., 1962, An improved method for the determination of FeO in rocks and minerals including garnet: U.S. Geological Survey bulletin 1144-B, p. B1-B5 :tables ;24 cm..

    Reichen, Laura E., and Fahey, Joseph J., 1968, Determination of nitrates in saline minerals: U.S. Geological Survey bulletin 1214-F, in "Contributions to Geochemistry", p. F1-F4; 24 cm., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1214F#>.

    Reichen, Laura E., and Lakin, Hubert W., 1949, Field method for the determination of zinc in plants: U.S. Geological Survey circular 41, 6 p.: ill.; 27 cm.

    Reichen, Laura E., and Ward, Frederick N., 1951, Field method for the determination of molybdenum in plants: U.S. Geological Survey circular 124, 4 p.; tables; 26 cm.

    Roberson, Charles E., and Hem, John D., 1969, Solubility of aluminum in the presence of hydroxide, fluoride, and sulfate: U.S. Geological Survey water supply paper 1827-C; in "Chemistry of Aluminum in Natural Water", iv, 37 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1827C#>.

    Robertson, Forbes S., McCarthy, J. Howard, and Lakin, Hubert W., 1956, Geochemical prospecting by soil analysis in Montana: Montana Bureau of Mines and Geology Bulletin 7, vii, 94 p.: ill., maps; 28 cm.

    Rose, Harry J., Jr., Adler, Isidore, and Flanagan, Francis J., 1962, Use of La2O3 as a heavy absorber in the X-ray fluorescence analysis of silicate rocks: U.S. Geological Survey professional paper 450-B; in "Geological Survey Research 1962", p. B80-B82.

    Rose, Harry J., Jr., and Flanagan, Francis J., 1962, X-ray fluorescence determination of thallium in manganese ores: U.S. Geological Survey professional paper 450-B; in "Geological Survey Research 1962", p. B82-B83.

    Rose, Harry J., Jr., Christian, Ralph P., Lindsay, James R., and Larson, Richard R., 1969, Microanalysis with the X-ray milliprobe: U.S. Geological Survey professional paper 650-B; in "Geological Survey Research 1969", p. B128-B135, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp650B#>.

    Rose, Harry J., Jr., Cuttitta, Frank, and Larson, Richard R., 1965, Use of X-ray fluorescence in determination of selected major constituents in silicates: U.S. Geological Survey professional paper 525-B; in "Geological Survey Research 1965", p. B155-B159, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp525B#>.

    Rose, Harry J., Jr., Cuttitta, Frank, Carron, Maxwell K., and Brown, Robena, 1964, Semimicro X-ray fluorescence analysis of tektites using 50-milligram samples: U.S. Geological Survey professional paper 475-D; in "Geological Survey Research 1963", p. D171-D173, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp475D#>.

    Rosenblum, Sam, 1974, A mineral separation procedure using hot Clerici solution: U.S. Geological Survey Journal of Research, vol 2, no 4, p. 479-482.

    Rosholt, John N., 1953, A quantitative radiochemical method for the determination of the major sources of natural radioactivity in ores and minerals: U.S. Geological Survey trace elements investigations report 318, 35 p.: ill.; 28 cm.

    Rosholt, John N., 1956, Quantitative radiochemical methods for the determination of the sources of natural radioactivity. Part II: U.S. Geological Survey trace elements investigations report 484, 36 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei484#>.

    Ross, Malcolm, and Christ, Charles L., 1958, Mineralogical applications of electron diffraction. I, Theory and techniques: U.S. Geological Survey trace elements investigations report 597, 54 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei597#>.

    Rowe, Jack J. and Simon, Frederick O., 1968, The determination of gold in geologic materials by neutron activation analysis using fire assay for the radiochemical separations: U.S. Geological Survey circular 599, iii, 4 p.; illus.; 26 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir599#>.

    Rowe, Jack J., 1951, Noninterference of arsenate ion in the volumetric determination of uranium using the Jones reductor: U.S. Geological Survey trace elements investigations report 316, 9 leaves: ill.; 29 cm.

    Rowe, Jack James, 1973, Determination of gold in phosphates by activation analysis using epithermal neutrons: U.S. Geological Survey Journal of Research, vol 1, no 1, p. 79-80.

    Rowe, Jack James, and Steinnes, Eiliv, 1977, Determination of 22 minor and trace elements in 8 new USGS standard rocks by instrumental activation analysis with epithermal neutrons: U.S. Geological Survey Journal of Research, vol 5, no 3, p. 397-402.

    Sanford, Richard F., and Seeley, James L., 1987, A new method of analysis for trace elements in gold-silver deposits : comparison with Lake City data: U.S. Geological Survey open-file report 87-67, i, 39 leaves; 28 cm.

    Sanzolone, Richard F., and Ryder, Jean L., 1989, Quality assessment program and results for the NAWQA surface water pilot studies: U.S. Geological Survey open-file report 89-658, 22 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr89658#>.

    Sanzolone, Richard F., Chao, T.T., and Welsch, Eric P., 1979, Determination of arsenic in geological materials by electrothermal atomic-absorption spectrometry after hydride generation: Analytica Chimica Acta, vol 108, 357-361.

    Schnepfe, Marian M., 1958, A study of cation exchange with vermiculite: U.S. Geological Survey open-file report 512, 40 p. ill. ;28 cm., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr60122#>.

    Schnepfe, Marian M., 1974, Spectrofluorimetric procedure using 2,3-napthalenediamine for determining selenium in rocks: U.S. Geological Survey Journal of Research, vol 2, no 5, p. 631-636.

    Schnepfe, Marian M., and Grimaldi, Frank S., 1968, Determination of rhodium in rocks: U.S. Geological Survey professional paper 600-D; in "Geological Survey Research 1968", p. D210-D213, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp600D#>.

    Schnepfe, Marian M., and Grimaldi, Frank S., 1969, Atomic absorption determination of rhodium in chromite concentrates: Talanta, vol 16, iss 11, 1461-1465.

    Senftle, Frank E., 1976, Possible methods of measuring uranium and its radioactive products in solutions: U.S. Geological Survey open-file report 76-305, 7 leaves: ill.; 28 cm.

    Senftle, Frank E., 1980, Field studies of borehole gamma-ray spectrometer methods for mineral exploration : a selected bibliography: U.S. Geological Survey open-file report 80-503, 41 leaves; 28 cm.

    Senftle, Frank E., and Bracken, Jim T., 1954, Theoretical effect of diffusion on isotopic abundance ratios in rocks and associated fluids: U.S. Geological Survey trace elements investigations report 418, 31 leaves: ill.; 29 cm.

    Senftle, Frank E., et al, 1976, Field experiments to test neutron interaction techniques in boreholes in relatively dry, low porosity rock: U.S. Geological Survey open-file report 76-418, 26, [5] leaves: ill.; 28 cm.

    Senftle, Frank E., et al, 1976, Intrinsic germanium detector used in borehole sonde for uranium exploration: U.S. Geological Survey open-file report 76-452, 1 v. (various pagings): ill.; 28 cm.

    Senftle, Frank E., Farley, T.A., and Lazar, Norman H., 1956, The half life of Th??? and the branching ratio of Bi???: U.S. Geological Survey trace elements investigations report 193, 12 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei193#>.

    Senftle, Frank E., Farley, T.A., and Stieff, Lorin R., 1953, Theoretical alpha star populations in loaded nuclear emulsions: U.S. Geological Survey trace elements investigations report 374, 25 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei374#>.

    Senftle, Frank E., Hackney, P., Jackson, F., Parker, A., Miller, K., and Brown, Zoe Ann, 1988, Low-ash solid fuel from sewage sludge : an acid extraction method (progress report): U.S. Geological Survey open-file report 88-239, 28 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr88239#>.

    Senftle, Frank E., Tanner, A. B., Philbin, P. W., Boynton, G. R., and Schram, C. W., 1977, In situ analysis of coal using a 252CF-GE(Li) borehole sonde: U.S. Geological Survey open-file report 77-162, 17 leaves: ill.; 28 cm.

    Shapiro, Leonard, 1960, A spectrophotometric method for the determination of FeO in rocks: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B496-B497.

    Shapiro, Leonard, 1967, A simple and rapid indirect determination of fluorine in minerals and rocks: U.S. Geological Survey professional paper 575-D; in "Geological Survey Research 1967", p. D232-D235.

    Shapiro, Leonard, 1967, Rapid analysis of rocks and minerals by a single-solution method: U.S. Geological Survey professional paper 575-B; in "Geological Survey Research 1967", p. B187-B191.

    Shapiro, Leonard, 1969, Rapid determination of powder density of rocks by a sink-float technique: U.S. Geological Survey professional paper 650-B; in "Geological Survey Research 1969", p. B140-B142, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp650B#>.

    Shapiro, Leonard, 1971, Rapid scanning technique for low levels of CO2 in silicate rocks: U.S. Geological Survey professional paper 750-B; in "Geological Survey Research 1971", p. B161-B162, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp750B#>.

    Shapiro, Leonard, 1973, Rapid determination of sulfur in rocks: U.S. Geological Survey Journal of Research, vol 1, no 1, p. 81-84.

    Shapiro, Leonard, 1974, Spectrophotometric determination of silica at high concentrations using fluoride as a depolymerizer: U.S. Geological Survey Journal of Research, vol 2, no 3, p. 357-360.

    Shapiro, Leonard, 1975, Rapid analysis of silicate, carbonate and phosphatic rocks [revised edition]: U.S. Geological Survey bulletin 1401, 76 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1401#>.

    Shapiro, Leonard, and Brannock, Walter W., 1952, A field test for titanium in rocks: U.S. Geological Survey open-file report 157, 3 leaves; 26 cm.

    Shapiro, Leonard, and Brannock, Walter W., 1952, Rapid analysis of silicate rocks: U.S. Geological Survey circular 165, 17 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir165#>.

    Shapiro, Leonard, and Brannock, Walter W., 1954, Field method for the determination of titanium in rocks: U.S. Geological Survey open-file report 232, 6 leaves; 27 cm.

    Shapiro, Leonard, and Brannock, Walter W., 1956, Rapid analysis of silicate rocks: U.S. Geological Survey bulletin 1036-C; in "Contributions to Geochemistry", p. 19-49, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1036C#>.

    Shapiro, Leonard, and Brannock, Walter W., 1957, A field method for the determination of calcium and magnesium in limestone and dolomite: U.S. Geological Survey open-file report 411, 8 leaves; 27 cm.

    Shapiro, Leonard, and Brannock, Walter W., 1959, Multiple pipetting device: , 1 leaf : ill.; 25 cm.

    Shapiro, Leonard, and Brannock, Walter W., 1962, Rapid analysis of silicate, carbonate and phosphate rocks: U.S. Geological Survey bulletin 1144-A; in "Contributions to Geochemistry", 56 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1144A#>.

    Shapiro, Leonard, and Curtis, E.L., 1963, Percent-constituent printing accessory and flow-through cell for a spectrophotometer: U.S. Geological Survey professional paper 475-B; in "Geological Survey Research 1963", p. C171-C174.

    Shapiro, Leonard, and Massoni, Camillo J., 1965, Automatic sample changer and controller for an X-ray quantometer: U.S. Geological Survey professional paper 525-D; in "Geological Survey Research 1965", p. D178-D183.

    Shapiro, Leonard, and Massoni, Camillo J., 1968, Automatic sample changer for atomic absorption spectrophotometry: U.S. Geological Survey professional paper 600-B; in "Geological Survey Research 1968", p. B126-B129.

    Shapiro, Leonard, and Rosenbaum, Fred, 1962, A sequential heating device for FeO determinations: U.S. Geological Survey professional paper 450-C; in "Geological Survey Research 1962", p. C102-C103.

    Shapiro, Leonard, and Toulmin, Martha S., 1961, Colorometric determination of iron in small samples of sphalerite: U.S. Geological Survey professional paper 424-B; in "Geological Survey Research 1961", p. B328-B329.

    Siems, David F., 2000, The determination of 30 elements in geological materials by energy-dispersive X-ray fluorescence spectrometry: U.S. Geological Survey open-file report 00-475, 13 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr00475#>.

    Siems, David F., 2002, The determination of 30 elements in geological materials by energy-dispersive X-ray fluorescence spectrometry, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. U1-U11, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/U27edsfinal_U.pdf#>.

    Simon, Frederick O., 1962, Spectrophotometric catalytic determination of small amounts of rhenium in mineralized rocks and molybdenite: U.S. Geological Survey open-file report 666, viii, 50 leaves: ill.; 30 cm.

    Simon, Frederick O., and Rollinson, C.L., 1975, Determination of tungsten in geologic materials by neutron activation analysis: U.S. Geological Survey Journal of Research, vol 3, no 4, p. 475-478.

    Simon, Frederick O., Campbell, E.Y., and Aruscavage, Philip J., 1977, Thallium contents of 16 USGS standard rocks: U.S. Geological Survey Journal of Research, vol 5, no 5, p. 579-581.

    Skeen, Carol J., 1989, Computerized spectrographic data for two new USGS rocks, AMH-1 and DTS-2: U.S. Geological Survey open-file report 89-183, 15 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr89183#>.

    Skeen, Carol J., 1996, Carbon, hydrogen, and nitrogen by a CHN elemental analyzer, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 186-190, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Skougstad, Marvin W., 1957, Application and evaluation of the Sargent-Malmstadt Automatic Titrator to argentimetric and mercurimetric chloride titrations: U.S. Geological Survey open-file report 57-101, 12 p., 3 figs., 5 tables.

    Skougstad, Marvin W., 1957, Flame photometric determination of strontium in water: U.S. Geological Survey open-file report 57-102, ii, 18 leaves: ill.; 28 cm.

    Skougstad, Marvin W., 1961, Copper-spark method for spectrochemical determination of strontium in water: U.S. Geological Survey water supply paper 1496, 19-31 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1496B#>.

    Skougstad, Marvin W., and Hem, John D., 1958, Stability of ferrous iron and coprecipitation of copper with ferric hydroxide: , iii, 24 leaves: ill.; 27 cm.

    Skougstad, Marvin W., and Horr, C. Albert, 1960, Occurrence of strontium in natural water: U.S. Geological Survey circular 420, iii, 6 p.; map. 27cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir420>#

    Skougstad, Marvin W., Fishman, Marvin J., Friedman, Linda C., Erdmann, David E., and Duncan, S. S.,editors, 1978, Methods for analysis of inorganic substances in water and fluvial sediments: U.S. Geological Survey open-file report 78-679, 1159 p..

    Skougstad, Marvin W., Fishman, Marvin J., Friedman, Linda C., Erdmann, David E., and Duncan, S.S., editors, 1979, Methods for determination of inorganic substances in water and fluvial sediments: Techniques of water resources investigations of the United States Geological Survey; bk. 5, ch. A1, xii, 626 p.: ill., diagrs.; 26 cm.

    Sloan, Jan., Zartman, Robert E., Bush, Charles A., and Abston, Carl C., 2003, National Geochronological Database: U.S. Geological Survey open-file report 2003-236, , accessed November 2, 2009 at #<http://geopubs.wr.usgs.gov/open-file/of03-236/#>.

    Smith, Ronald L., and Pietrzyk, D.J., 1984, Liquid chromatographic separation of metal ions on a silica column: Analytical Chemistry, vol 56, iss 4, 610-614.

    Smith, Ross W., and Hem, John D., 1972, Effect of aging on aluminum hydroxide complexes in dilute aqueous solutions: U.S. Geological Survey water supply paper 1827-D; in "Chemistry of Aluminum in Natural Water", iv, 51 p.; illus.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wsp/wsp1827D#>.

    Starkey, Harry C., Blackmon, Paul D., and Hauff, Phoebe L., 1984, The routine mineralogical analysis of clay-bearing samples: U.S. Geological Survey bulletin 1563, iv, 32 p.: ill.; 23 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1563#>.

    Starkey, Harry C., Mountjoy, Wayne, and Gardner, J.M., 1977, Removal of fluorine and lithium from hectorite by solutions spanning a wide range of pH: U.S. Geological Survey Journal of Research, vol 5, no 2, p. 235-237.

    Stevens, Rollin E., 1934, Studies on the alkalinity of some silicate minerals: U.S. Geological Survey professional paper 400-B, p. 1-13.

    Stevens, Rollin E., and Lakin, Hubert W., 1949, The chromograph, a new analytical tool for laboratory and field use: U.S. Geological Survey circular 63, 11 p.: illus.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir63#>.

    Stevens, Rollin E., Chodos, Arthur A., Havens, Raymond G., Godijn, Elisabeth, and Neil, Sara T., 1960, Combination of gravimetric and spectrographic methods in the analysis of silicates: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B499-B501.

    Stevens, Rollin E., et al, 1960, Second report on a cooperative investigation of the composition of two silicate rocks: U.S. Geological Survey bulletin 1113, 126 p.: diagrs, tables. ;24 cm., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1113#>.

    Stevens, Rollin E., Wood, W. H., Goetz, K. G, and Horr, Clarence A., 1956, Machine for preparing phosphors for the fluorimetric determination of uranium: U.S. Geological Survey trace elements investigations report 578, 22 p., 5 fig., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei578#>.

    Stieff, Lorin R., 1981, Studies of an improved polonium-210 analytical procedure and the distribution and transport of uranium and its alpha daughters using nuclear emulsions : final report: GJBX no. 82-111, iv, 120 p.: ill., maps; 28 cm.

    Stieff, Lorin R., and Stern, Thomas W., 1951, The preparation of nuclear-track plates and stripping films for the study of radioactive minerals: U.S. Geological Survey trace elements investigations report 127, 16 leaves: ill., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei127#>.

    Struzeski, Tedmund M., DeGiacomo, W. Jack., and Zayhowski, Edward J., 1996, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of dissolved aluminum and boron in water by inductively coupled plasma-atomic emission spectrometry: U.S. Geological Survey open-file report 96-149, vi, 17 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96149#>.

    Stuckless, John S., and van Trump, George, Jr., 1979, A revised version of Graphic Normative Analysis Program (GNAP) with examples of petrologic problem solving : U.S. Geological Survey open-file report 79-1237, 112 p.: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr791237#>.

    Stuckless, John S., Millard, Hugh T., Jr., Bunker, Carl M., Nkomo, I.T., Rosholt, John N., Bush, Charles A., Huffman, Claude, Jr., and Keil, R.L., 1977, A comparison of some analytical techniques for determining uranium, thorium and potassium in granitic rocks: U.S. Geological Survey Journal of Research, vol 5, no 1, p. 83-91.

    Sutton, Art L., and Christie, Joseph H., 1992, Organization and design of an automated laboratory information management system for the Branch of Geochemistry Research and Operational Laboratory: U.S. Geological Survey open-file report 92-392, 20 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr92392#>.

    Sutton, Arthur L., Havens, Roy G., and Sainsbury, Cleo, L., 1973, A spectrochemical method for determining the composition of native gold: U.S. Geological Survey Journal of Research, vol 1, no 3, p. 301-308.

    Swanson, Vernon E., and Huffman, Claude, Jr., 1976, Guidelines for sample collecting and analytical methods used in the U.S. Geological Survey for determining chemical composition of coal: U.S. Geological Survey circular 735, iv, 11 p.; 26 cm, accessed November 2, 2009 at #<http://energy.er.usgs.gov/products/papers/C735/index.htm#>.

    Swanson, Vernon E., et al, 1976, Collection, chemical analysis, and evaluation of coal samples in 1975: U.S. Geological Survey open-file report 76-468, a-e, 503 p.: maps; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr76468#>.

    Taggart, Joseph E., and Wahlberg, James S., 1980, New mold design for casting fused samples: Advances In X-ray Analysis, vol 23, 257-261.

    Taggart, Joseph E., editor, 2002, Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Sur: U.S. Geological Survey open-file report 02-223, , accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/#>.

    Taggart, Joseph E., Jr., and Siems, David F., 2002, Major element analysis by wavelength dispersive X-ray fluorescence spectrometry, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. T1-T9, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/T16WDXRF_M.pdf#>.

    Taggart, Joseph E., Jr., Wahlberg, James S., and Taylor, Howard E., 1980, X-ray spectrometric major-element analyses of tephra samples from the May 18, 1980 eruption of Mt. St. Helens : samples collected from Washington, Idaho, and Montana: U.S. Geological Survey open-file report 80-1130, 13 p. ; 28 cm., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr801130#>.

    Taggart, Joseph E., Lichte, Frederick E., and Wahlberg, James S., 1981, Methods of analysis of samples using X-ray fluorescence and induction coupled plasma spectroscopy; in The 1980 Eruption of Mount St. Helens, Washington: U.S. Geological Survey professional paper 1250, p. 683-687.

    Taggart, Joseph E., Lindsay, James R., Scott, B.A., Vivit, Davison V., Bartel, Ardith J., and Stewart, Kathleen C., 1987, Analysis of geologic materials by wavelength-dispersive X-ray fluorescence spectrometry, in Methods for geochemical analysis: U.S. Geological Survey bulletin 1770-E, E1-E19.

    Tanner, Allan B., 1971, Linear combination reading program for capture gamma rays: U.S. Geological Survey open-file report 1626, [9] leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr71277#>.

    Tanner, Allan B., and Senftle, Frank E., 1978, A table of photopeaks useful in nuclear geophysics: U.S. Geological Survey open-file report 78-531, 69 leaves; 29 cm.

    Tanner, Allan B., Moxham, Robert M., and Senftle, Frank E., 1977, Assay for uranium and determination of disequilibrium by means of in situ high-resolution gamma-ray spectrometry: U.S. Geological Survey open-file report 77-571, 22, 11 leaves: ill. (some fold.); 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr77571#>.

    Tatlock, Donald B., 1961, Rapid quantitative estimates of quartz and total iron in silicate rocks by X-ray diffraction: U.S. Geological Survey professional paper 424-B; in "Geological Survey Research 1961", p. B334-B337.

    Tatlock, Donald B., 1966, Rapid modal analysis of some felsic rocks from calibrated X-ray diffraction patterns: U.S. Geological Survey bulletin 1209, iv, 41 p.; illus.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1209#>.

    Taylor, Cliff D., Theodorakos, Peter M., and Peacock, Thomas R., 2002, Sample Preparation, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. A1-1 - A3-4, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/A1RxSampPrep_M.pdf#>.

    Taylor, Howard E., 1987, Atomic spectroscopy advances : inductively coupled plasma-mass spectrometry, an introduction: Spectroscopy vol 1, no 11, leaves 20-22: ill.; 28 cm.

    Taylor, Howard E., Beaulieu, Paul R., and Skogerboe, Rodney K., 1988, Design and operation of a multielement photodiode-array atomic absorption spectrometer: U.S. Geological Survey water resources investigations report 87-4206, 19 p.: ill.; 28 cm.

    Thatcher, Leland L., 1961, Evaluation of hydrologic tracers: U.S. Geological Survey professional paper 424-D; in "Geological Survey Research 1961", p. D396-D397, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1144B#>.

    Thatcher, Leland L., 1976, Neutron activation analysis in hydrology: U.S. Geological Survey open-file report 76-339, iv, 19 leaves: ill.; 28 cm.

    Thatcher, Leland L., Janzer, Victor J., and Edwards, Kenneth W., 1976, Methods for determination of radioactive substances in water and fluvial sediments: U.S. Geological Survey open-file report 76-560, ix, 263 p.; ill.; 28 cm.

    Thatcher, Leland L., Janzer, Victor J., and Edwards, Kenneth W., 1977, Methods for determination of radioactive substances in water and fluvial sediments: Techniques of water resources investigations of the United States Geological Survey bk. 5, ch. A5, vi, 95 p. (loose-leaf): ill.; 29 cm, accessed November 2, 2009 at #<http://water.usgs.gov/pubs/twri/twri5a5/#>.

    Theobald, Paul K., Jr., and Thompson, Charles E., 1959, Geochemical prospecting with heavy-mineral concentrates used to locate a tungsten deposit: U.S. Geological Survey circular 411, 13 p.: ill., maps; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir411#>.

    Theobald, Paul K., Jr., and Thompson, Charles E., 1968, Experimental error in sample preparation and spectrographic analysis in the Jiddah laboratory, Saudi Arabia: U.S. Geological Survey open-file report 1131, 6 p. :col. ill. ;28 cm..

    Theodorakos, Peter M., 2002, Colorometric determination of ferrous iron, Fe(II), in natural water, wastewater, and seawater, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. W1-W2, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/W11Fe(II>)Hach_M.pdf#.

    Theodorakos, Peter M., 2002, Conductivity measured using a self contained Digital Meter, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. D1-D2, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/D28Cond_M.pdf#>.

    Theodorakos, Peter M., 2002, Determination of Total Alkalinity using a preset endpoint (pH 4.5) Autotitration System, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. E1-E3, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/E04PresetEndpoint_M.pdf#>.

    Theodorakos, Peter M., 2002, Fluoride, chloride, nitrate, and sulfate in aqueous solution utilizing AutoSuppression chemically suppressed ion chromatography: U.S. Geological Survey open-file report 02-223, p. V1-V7, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/OFR-02-0223.pdf#>.

    Thomas, Catharine P., 1978, A minicomputer based emission spectrographic analysis system : the program: U.S. Geological Survey open-file report 78-982, 427 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr78982#>.

    Thomas, Catherine P., 1975, An integrated-intensity method for emission spectrographic computer analysis: U.S. Geological Survey Journal of Research, vol 3, no 2, p. 181-186.

    Thompson, Charles E., 1967, A spectrophotometric method for the determination of traces of platinum and palladium in geologic materials: U.S. Geological Survey professional paper 575-D; in "Geological Survey Research 1967", p. D236-D238.

    Thompson, Charles E., and Lakin, Hubert W., 1957, A field chromatographic method for determination of uranium in soils and rocks: U.S. Geological Survey bulletin 1036-L; in "Contributions to Geochemistry", p. iii, 209-220: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1036L#>.

    Thompson, Charles E., and Lakin, Hubert W., 1963, Separation of tellurium from iron and gold using tributyl phosphate and ether: U.S. Geological Survey professional paper 475-B; in "Geological Survey Research 1963", p. B28-B29, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp475B#>.

    Thompson, Charles E., and Nakagawa, Harry N., 1960, Spectrophotometric determination of traces of lead in igneous rocks: U.S. Geological Survey bulletin 1084-F; in "Contributions to Geochemistry", iii, 151-164 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1084F#>.

    Thompson, Charles E., Nakagawa, Harry N., and VanSickle, Gordon H., 1968, Rapid analysis for gold in geologic materials: U.S. Geological Survey professional paper 600-B; in "Geological Survey Research 1968", p. B130-132.

    Tillman, J.H., 1977, A combustimetric method for determining the total carbon content of geologic materials: U.S. Geological Survey Journal of Research, vol 5, no 5, p. 583-587.

    Truesdell, Alfred H., and Christ, Charles L., 1964, Use of sodium-sensitive glass electrodes for solubility determinations: U.S. Geological Survey professional paper 475-D; in "Geological Survey Research 1963", p. D167-D171, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp475D#>.

    Truesdell, Alfred H., Carroll, Dorothy, and Schnepfe, Marian M., 1967, Bibliography of ion exchange in selectivity: U.S. Geological Survey open-file report 936, 89, [1] leaves; 27 cm.

    VanSickle, Gordon H., and Lakin, Hubert W., 1968, An atomic-absorption method for the determination of gold in large samples of geologic materials: U.S. Geological Survey circular 561, iii, 4 p.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir561#>.

    VanTrump, George, Jr., and Alminas, Henry V., 1978, REM (relative element magnitude) : program explanation and computer program listing: U.S. Geological Survey open-file report 78-1014, 18 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr781014#>.

    VanTrump, George, Jr., and Hauff, Phoebe L., 1976, Mineral x-ray diffraction data retrieval/plot computer program: U.S. Geological Survey open-file report 76-404, 24 p.; 30 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr76404#>.

    VanTrump, George, Jr., and Hauff, Phoebe L., 1976, The mineral x-ray diffraction data file : description and indices: U.S. Geological Survey open-file report 76-406, 145 p.; 28 cm.

    VanTrump, George, Jr., and Hauff, Phoebe L., 1977, Special application of the computer program XRDPLT : accessing a user-generated data base: U.S. Geological Survey open-file report 77-53, ii, 26 |eaves: ill.; 28 cm.

    VanTrump, George, Jr., and Hauff, Phoebe L., 1978, Least-squares refinement of powder diffraction data for unit cell parameters : program listing for DEC 10 computer: U.S. Geological Survey open-file report 78-431, iii, 67 leaves: 28 cm.

    Vaughn, William W., 1967, A simple mercury vapor detector for geochemical prospecting: U.S. Geological Survey circular 540, 8 p., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir540#>.

    Vaughn, William W., and McCarthy, J. Howard, Jr., 1964, An instrumental technique for the determination of submicrogram concentrations of mercury in soils, rocks and gas: U.S. Geological Survey professional paper 501-D; in "Geological Survey Research 1964", p. D123-D127.

    Vaughn, William W., Cramer, William G., and Sharp, William N., 1965, Gamma activation device for low-level beryllium analysis: U.S. Geological Survey professional paper 525-B; in "Geological Survey Research 1965", p. B151-B154, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp525B#>.

    Vernon, R. W., and Beetem, W. Arthur, 1964, Addition of surfactants to prevent precipitation interference in the determination of tritium concentration by liquid scintillation counting: Technical letter. Carlsbad hydrology; 6, ii, 17 leaves: ill.; 27 cm.

    Viets, John G., 1978, Determination of silver, bismuth, cadmium, copper, lead, and zinc in geologic materials by atomic absorption spectrometry with tricaprylmethylammonium chloride: Analytical Chemistry, vol 50, iss 8, 1097-1101.

    Vivit, Davison V., and Jenne, Everett A., 1985, Selected methods for dissolved iron (II, III) and dissolved sulfide (-II) determinations in geothermal waters: U.S. Geological Survey water resources investigations report 85-4189, iv, 16 p.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/wri/wri854189#>.

    Vivit, Davison V., and Lindsay, James R., 1987, X-ray spectrometric determinations of arsenic sorbed onto cellulose after solvent extraction from fused silicate rocks: U.S. Geological Survey open-file report 87-183, 9 leaves: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr87183#>.

    Wahlberg, James S., and Dewar, R.S., 1965, Comparison of distribution coefficients for strontium exchange from solutions containing one and two competing cations: U.S. Geological Survey bulletin 1140-D; in "Ion Exchange on Mineral Materials", 10 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1140D#>.

    Wahlberg, James S., and Fishman, Marvin J., 1962, Adsorption of cesium on clay minerals: U.S. Geological Survey bulletin 1140-A; in "Ion Exchange on Mineral Materials", 30 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1140A#>.

    Wahlberg, James S., and Myers, Alfred T., 1968, Determination of bromine and iodine by X-ray fluorescence: U.S. Geological Survey professional paper 600-D; in "Geological Survey Research 1968", p. D214-D216, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp600D#>.

    Wahlberg, James S., et al, 1965, Exchange adsorption of strontium on clay minerals: U.S. Geological Survey bulletin 1140-C; in "Ion Exchange on Mineral Materials", 26 p.: ill.; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1140C#>.

    Wahlberg, James S., Skinner, Dwight L., and Rader, Lewis F., Jr., 1956, Volumetric determination of uranium using titanous sulfate as reductant before oxidimetric titration: U.S. Geological Survey trace elements investigations report 614, 20 leaves: ill.; 29 cm.

    Walker, Edward C., Cuttitta, Frank, and Senftle, Frank E., 1957, Some natural variations in the relative abundance of copper isotopes: U.S. Geological Survey trace elements investigations report 696, 29 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei696#>.

    Walthall, Frank G., 1974, Spectrochemical computer analysis - program description: U.S. Geological Survey Journal of Research, vol 2, no 1, p. 61-71.

    Wandless, Greg A., 1987, Radiochemical neutron activation analysis of geologic materials, in Methods for geochemical analysis: U.S. Geological Survey bulletin 1770-J, J1-J8.

    Wandless, Greg A., 1996, Instrumental neutron activation by abbreviated count, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 211-217, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Wandless, Greg A., 1996, Instrumental neutron activation by long count, in Analytical methods manual for the Mineral Resource Surveys Program, U.S. Geological Survey: U.S. Geological Survey open-file report 96-525, p. 218-227, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr96525#>.

    Ward, Frederick N., 1951, Field method for the determination of tungsten in soils: U.S. Geological Survey circular 119, 4 p.; tables; 26 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/cir/cir119#>.

    Ward, Frederick N., 1970, Analytical methods for determination of mercury in rocks and soils: U.S. Geological Survey professional paper 713; in "Mercury in the Environment", p. 46-49, accessed November 2, 2009 at <http://pubs.er.usgs.gov/usgspubs/pp/pp713>

    Ward, Frederick N., and Crowe, Harry E., 1956, Colorimetric determinations of traces of bismuth in rocks: U.S. Geological Survey bulletin 1036-I; in "Contributions to Geochemistry", p. 173-179, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1036I#>.

    Ward, Frederick N., and Fishman, Marvin J., 1976, Determination of lead in soils and rocks: U.S. Geological Survey professional paper 957; in "Lead in the Environment", p. 81-84, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp957#>.

    Ward, Frederick N., and Marranzino, Albert P., 1957, Field determination of uranium in natural waters: U.S. Geological Survey bulletin 1036-J; in "Contributions to Geochemistry", p. iii, 181-192; 24 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1036J#>.

    Ward, Frederick N., and McHugh, John B., 1964, Determination of mercury in vegetation with dithizone - A single extraction procedure: U.S. Geological Survey professional paper 501-D; in "Geological Survey Research 1964", p. D128-D130.

    Ward, Frederick N., and Nakagawa, Harry N., 1967, Atomic absorption determination of bismuth in altered rocks: U.S. Geological Survey professional paper 575-D; in "Geological Survey Research 1967", p. D239-D241.

    Ward, Frederick N., editor, 1975, New and refined methods of trace analysis useful in geochemical exploration : a collection of methods additional to those presented earlier in U.S. Geological Survey bulletins 1152 and 1289: U.S. Geological Survey bulletin 1408, iv, 105 p.; 24 cm.

    Ward, Frederick N., Lakin, Hubert W., Almond, Hy, Bloom, Harold, Crowe, Harry E., and Marranzino, Albert P., 1953, Additional field methods used in geochemical prospecting by the U.S. Geological Survey: U.S. Geological Survey open-file report 208, 42 leaves: ill.; 27 cm.

    Ward, Frederick N., Lakin, Hubert. W., Canney, Frank. C., et al, 1963, Analytical methods used in geochemical exploration by the U.S. Geological Survey : a compilation of trace and semimicroanalytical methods of yielding semiquantitative data on geologic materials useful in geochemical prospecting for ore deposits: U.S. Geological Survey bulletin 1152, iv, 100 p.: ill.; 24 cm.

    Ward, Frederick N., Nakagawa, Harry N., Harms, Thelma F., and VanSickle, Gordon H., 1969, Atomic-absorption methods of analysis useful in geochemical exploration: U.S. Geological Survey bulletin 1289, iii, 45 p.; 24 cm.

    Waring, Claude L., 1964, Determination of hafnium content and Hf/Zr ratios in zircon with the direct-reading emission spectrometer: U.S. Geological Survey professional paper 501-B; in "Geological Survey Research 1964", p. B146-B147.

    Waring, Claude L., and Annell, Charles S., 1951, A semiquantitative spectrographic method for the analysis of minerals, rocks, and ores: U.S. Geological Survey trace elements investigations report 143, 23 leaves; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei143#>.

    Waring, Claude L., and Annell, Charles S., 1952, A semiquantitative spectrographic method for the analysis of minerals, rocks, and ores, II: U.S. Geological Survey trace elements investigations report 215, 32 p.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei215#>.

    Waring, Claude L., and Conklin, Nancy M., 1966, Quantitative spectrochemical determination of minor elements in apatite: U.S. Geological Survey professional paper 550-C; in "Geological Survey Research 1966", p. C228-C230.

    Waring, Claude L., and Mela, Henry, Jr., 1952, The determination of small amounts of rare earths in phosphate rocks: U.S. Geological Survey trace elements investigations report 1239, 20 leaves : ill. ; 29 cm., accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei239#>.

    Waring, Claude L., and Worthing, Helen W., 1952, A spectrographic method for determining trace amounts of lead in zircon and other minerals: U.S. Geological Survey trace elements investigations report 216, 15 leaves: ill.; 29 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei216#>.

    Waring, Claude L., and Worthing, Helen W., 1955, A spectrographic method for determining the hafnium-zirconium ratio in zircon: U.S. Geological Survey trace elements investigations report 502, 15 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei502#>.

    Waring, Claude L., and Worthing, Helen W., 1956, A spectrographic method for determining the hafnium-zirconium ratio in zircon: U.S. Geological Survey bulletin 1036-F; in "Contributions to Geochemistry", p. 81-90, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/b/b1036F#>.

    Waring, Claude L., Franck, Mona L. and Sherwood, Alexander M., 1954, An application of spectrographic microphotometric scanning: U.S. Geological Survey trace elements investigations report 444, 29 p., accessed November 2, 2009 at <http://pubs.er.usgs.gov/usgspubs/tei/tei444>.

    Waring, Claude L., Franck, Mona L., and Sherwood, Alexander M., 1956, An application of spectrographic microphotometric scanning: U.S. Geological Survey bulletin 1036-E; in "Contributions to Geochemistry", p. 69-80.

    Waring, Claude L., Worthing, Helen W., and Hazel, Katherine V., 1957, A spectrochemical method for the determination of selenium: U.S. Geological Survey trace elements investigations report 687, 16 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/tei/tei687#>.

    Warr, Jesse J., and Cuttitta, Frank, 1960, The determination of lead in iron-bearing materials: U.S. Geological Survey professional paper 400-B; in "Geological Survey Research 1960", p. B483-B484.

    Watterson, John R., 1976, Determination of tellurium and gold in rocks to 1 part per billion: U.S. Geological Survey open-file report 76-531, 3 p..

    Watterson, John R., and Neuerburg, George J., 1975, Analysis for tellurium in rocks to 5 parts per billion: U.S. Geological Survey Journal of Research, vol 3, no 2, p. 191-195.

    Watterson, John R., Ficklin, Walter H., and Turner, James H., 1976, A modification of Shapiro's technique for determining low levels of CO2 in silicate rocks: U.S. Geological Survey open-file report 76-530, 5 p..

    Welsch, Eric P., 1979, Determination of arsenic in geologic materials using silver diethyldithiocarbamate: U.S. Geological Survey open-file report 79-1442, 10 p..

    Werner, Stephen L., and Johnson, Sharon M., 1994, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of selected carbamate pesticides in water by high-performance liquid chromatography: U.S. Geological Survey open-file report 93-650, v, 29 p.: ill.; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr93650#>.

    Werner, Stephen L., Burkhardt, Mark R., and DeRusseau, Sabrina N., 1996, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of pesticides in water by Carbopak-B solid-phase extraction and high-preformance liquid chromatography: U.S. Geological Survey open-file report 96-216, vi, 42 p.; 28 cm, accessed November 2, 2009 at #<http://wwwnwql.cr.usgs.gov/Public/pubs/OFR96-216/OFR96-216.html#>.

    Wilson, E.E., and Stacey, J.S., 1969, A transistorized emission regulator for gas-source mass spectrometry: U.S. Geological Survey professional paper 650-B; in "Geological Survey Research 1969", p. B143-B146, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/pp/pp650B#>.

    Wilson, Stephen A., 1993, Assessment of chemical variability in three independently prepared batches of National Institute for Standards and Technology SRM 2704, Buffalo River Sediment: U.S. Geological Survey open-file report 93-692, 23 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr93692#>.

    Wilson, Stephen A., 1997, USGS certificate of analysis, coal, Lower Bakerstown CLB-1: U.S. Geological Survey open-file report 97299, , accessed November 2, 2009 at #<https://pubs.usgs.gov/of/1997/of97-299/#>.

    Wilson, Stephen A., and Herron, Matt, 2002, Dry moist samples to constant weight under ambient conditions, calculate % moisture, in Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Survey: U.S. Geological Survey open-file report 02-223, p. C1-C3, accessed November 2, 2009 at #<https://pubs.usgs.gov/of/2002/ofr-02-0223/C18QCMoist_M.pdf#>.

    Wilson, Stephen A., et al, 1995, The Physical preparation and chemical analysis of NIST SRMs 2786 and 2787, lead paint in soil: U.S. Geological Survey open-file report 95-486, 24 leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr95486#>.

    Wilson, Stephen A., et al, 1999, Collection, preparation and testing of NIST hard rock mine waste reference material SRM 2780: U.S. Geological Survey open-file report 99-370, 10, [5] leaves; 28 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr99370#>.

    Wilson, Stephen A., Kane, Jean S., Crock, James G., and Hatfield, D.B., 1987, Chemical methods of separation for optical emission, atomic absorption spectrometry, and colorimetry, in Methods for geochemical analysis: U.S. Geological Survey bulletin 1770-D, D1-D14.

    XRAL Laboratories, a Division of SGS Canada, 2007, 10 Element ICP-AES DIBK extraction: XRAL Analytical Contract Laboratory Method 2, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M2#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, 40 Element ICP-AES multi-acid, total: XRAL Analytical Contract Laboratory Method 1, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M1#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, 42 Element ICP-AES-MS multi-acid, total: XRAL Analytical Contract Laboratory Method 19, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M19#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, 55 Element ICP-AES-MS sodium peroxide sinter: XRAL Analytical Contract Laboratory Method 22, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#m22#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Arsenic and Antimony: XRAL Analytical Contract Laboratory Methods 9 & 11, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M9#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Carbonate Carbon: XRAL Analytical Contract Laboratory Method 3-B, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M3b#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Chloride (Cl): XRAL Analytical Contract Laboratory Method 18, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M18#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Essential and non-essential water: XRAL Analytical Contract Laboratory Method 5, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M5#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Ferrous oxide: XRAL Analytical Contract Laboratory Method 4, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M4#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Fluoride: XRAL Analytical Contract Laboratory Method 16, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M16#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Gold, Platinum, and Palladium: XRAL Analytical Contract Laboratory Method 20, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#m20#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Gold: XRAL Analytical Contract Laboratory Method 7, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M7#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, ICP Major Element Analysis Using a Lithium Metaborate Fusion: XRAL Analytical Contract Laboratory Method 17, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M17#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Mercury: XRAL Analytical Contract Laboratory Method 8, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M8#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Selenium (Se): XRAL Analytical Contract Laboratory Method 10, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M10#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Tellurium: XRAL Analytical Contract Laboratory Method 13, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M13#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Thallium: XRAL Analytical Contract Laboratory Method 14, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M14#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Titanium: XRAL Analytical Contract Laboratory Method 21, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#m21#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Total Carbon: XRAL Analytical Contract Laboratory Method 3-A, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M3a#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Total Sulfur: XRAL Analytical Contract Laboratory Method 6, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M6#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, Tungsten: XRAL Analytical Contract Laboratory Method 12, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M12#>.

    XRAL Laboratories, a Division of SGS Canada, 2007, XRF Major Element Analysis: XRAL Analytical Contract Laboratory Method 15, , accessed November 2, 2009 at #<http://minerals.cr.usgs.gov/intranet/chem/labmethods.html#M15#>.

    Zartman, Robert E., Bush, Charles A., and Abston, Carl C., 1995, National geochronological and natural radioelement data bases: U.S. Geological Survey digital data series DDS-14, 1 computer laser optical disc: col. ; 4 3/4 in..

    Zartman, Robert E., Cole, James C., and Marvin, Richard F., 1976, Reporter's guide to the Radiometric Age Data Bank (RADB): U.S. Geological Survey open-file report 76-675, 73 leaves: ill.; 27 cm.

    Zartman, Robert E., Cole, James C., and Marvin, Richard F., 1976, User's guide to the Radiometric Age Data Bank (RADB): U.S. Geological Survey open-file report 76-674, [1], 77 leaves: ill.; 27 cm, accessed November 2, 2009 at #<http://pubs.er.usgs.gov/usgspubs/ofr/ofr76674#>.

    Zielinski, Robert A., 1975, Radiochemical determination of very low concentrations of nickel in rocks and minerals: U.S. Geological Survey Journal of Research, vol 3, no 4, p. 467-474.

  5. How consistent are the relationships among the observations, including topology?

    The CCAP dataset was constructed by processing a subset of the original National Geochemical Database (NGDB) and National Uranium Resource Evaluation Database (NURE), checking for errors where possible, and using various selection criteria. The following criteria were chosen for selecting data for the rock data set:

    Each sample must have a valid and unique lab number Each sample must have a latitude and longitude Each sample must be identified as geologic material (rock, sediment, soil or concentrate) Each analytical determination must be linked to a valid and unique lab number Each analytical determination must be identified by analyte

    In addition, samples that could be identified as a processed derivative of geologic material, with the exception of heavy-mineral concentrates, were removed from the data set. This included single minerals, mineral separates, rock coatings, insoluble residues, partial digestions, and leachates.

    The samples in this data set were collected for a variety of purposes. Not all samples were subject to the same sample preparation protocol or the same analytical protocol. The samples have been analyzed using documented techniques. For some elements, the methods of chemical analysis were the same throughout the study, while for others, the methods changed as analytical technology improved. Some of the methods used were specifically designed to give a concentration value based on a partial digestion or extraction of the sample. For these methods elements tightly bound in the structure of silicates in the sample are not measured. Therefore, the analytical results from these partial extraction techniques may not be comparable with results from methods designed to measure the total concentration of an element in a sample.


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: none
Use_Constraints:
The U.S. Geological Survey makes no warranties related to the accuracy of the data and users are required to determine the suitability of use for any particular purpose.

  1. Who distributes the data set? (Distributor 1 of 1)

    Matthew Granitto
    U.S. Geological Survey
    Box 25046; Denver Federal Center, MS 973
    Denver, Colorado 80225
    United States of America

    1-303-236-1412 (voice)
    1-303-236-3200 (FAX)
    granitto@usgs.gov

  2. What's the catalog number I need to order this data set?

  3. What legal disclaimers am I supposed to read?

    These data are released on the condition that neither the U.S. Geological Survey (USGS) nor the United States Government may be held liable for any damages resulting from authorized or unauthorized use. The USGS provides these data "as is" and makes no guarantee or warranty concerning the accuracy of information contained in the data. The USGS further makes no warranties, either expressed or implied as to any other matter, whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 14-Dec-2009
Metadata author:
Matthew Granitto
U.S. Geological Survey
Box 25046, Denver Federal Center, MS 973
Denver, Colorado 80225
United States of America

1-303-236-1412 (voice)
1-303-236-3200 (FAX)
granitto@usgs.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)


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