Point Coverage SCASMPL: Sediment sample data for the Channel Islands and Santa Barbara Channel Region

Metadata also available as

Frequently-anticipated questions:

What does this data set describe?

Title:
Point Coverage SCASMPL: Sediment sample data for the Channel Islands and Santa Barbara Channel Region
Abstract:
Point data of surficial sediment textures from usSEABED, standardized and data-mined from existing studies, show the spatial extent of gravels, sands, muds, and areas of hard bottom in the Channel Islands and Santa Barbara regions.
Supplemental_Information:
Version 2.0 of scasmpl is a updated subset of the usSEABED database in the area of interest. Regional publications of the entire usSEABED are pending; these publications will contain more complete data and information about usSEABED and the data-mining process. Those data are in comma-delimited format, and can be used with geographic information systems (GIS) software and most database softwares.

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonpropriety form, as well as ArcExplorer format, this metadata may include some ArcExplorer-specific terminology.

  1. How should this data set be cited?

    U.S. Geological Survey, and Reid, Jane A. , 02282005, Point Coverage SCASMPL: Sediment sample data for the Channel Islands and Santa Barbara Channel Region: U.S. Geological Survey, Santa Cruz, CA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -121.10000
    East_Bounding_Coordinate: -118.80000
    North_Bounding_Coordinate: 34.568
    South_Bounding_Coordinate: 33.7

  3. What does it look like?

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

    Calendar_Date:
    Currentness_Reference: Date of data processing

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

    Geospatial_Data_Presentation_Form: point 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 (2393)

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

      The map projection used is NAD_1983_UTM_Zone_10N.

      Projection parameters:
      Straight-Vertical_Longitude_from_Pole: -123
      Standard_Parallel: 0.999600
      False_Easting: 500000.000
      False_Northing: 0.000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest .000512
      Ordinates (y-coordinates) are specified to the nearest .000512
      Planar coordinates are specified in meters

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic ReferenceSystem 80.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.2572222.

  7. How does the data set describe geographic features?

    seafloor sample
    point data within SCASMPL (Source: SCAMPL.shp)

    latitude
    global location (Source: lineage source)

    Range of values
    Minimum:33.7
    Maximum:34.568
    Units:decimal degrees
    Resolution:.00001

    longitude
    global location (Source: lineage source)

    Range of values
    Minimum:-121.0833
    Maximum:-118.8
    Units:decimal degrees
    Resolution:.00001

    water depth
    lineage source (Source: SCASMPL.shp)

    ValueDefinition
    -99no information

    Range of values
    Minimum:2
    Maximum:2610
    Units:meters
    Resolution:1.0

    SampleTop
    top of subsample (Source: lineage source)

    ValueDefinition
    -99no information

    Range of values
    Minimum:0
    Maximum:0.03
    Units:meters
    Resolution:0.001

    bottom of subsample
    meters (Source: lineage source)

    ValueDefinition
    -99no information

    Range of values
    Minimum:0
    Maximum:7.94
    Units:meters
    Resolution:0.001

    DataSetKey
    unique link to source data sets (Source: processing software dbSEABED MNEs)

    ValueDefinition
    17SCCWRP94
    82Deck 41 nodcref# 619
    187Deck 41 nodcref# 831
    194Deck 41 nodcref# 871
    204NS&T MusselWatch
    216Smithsonian NOS database
    237USGS MF-737
    238USGS OFR 92-342
    242NGDC MGGID 09005058
    261NGDC MGGID 09185006
    262NGDC MGGID 09005019
    265NGDC MGGID 09695001
    268Scholl MS 1959
    283University of Southern California SEDDATA database
    284Smith PhD. 1970
    285Barnes PhD 1970
    286Emery and Shepard, 1941
    288Emery and Hulsemann, 1963
    303Wright PhD 1967
    304Gorsline PhD 1958
    308SCCWRP Bight 98

    SiteKey
    unique relational key for individual sites (Source: processing software dbSEABED MNEs)

    Range of values
    Minimum:1
    Maximum:1030
    Units:unitless
    Resolution:1

    SiteKey
    unique relational key for individual subsamples (Source: processing software dbSEABED MNEs)

    Range of values
    Minimum:1
    Maximum:1272
    Units:unitless
    Resolution:1

    Sampler
    non-unique label of sampler type and penetration depth (m) (Source: lineage source, processing software dbSEABED MNEs)

    ValueDefinition
    BoxCoreunspecified box core sampler
    DietzLaFondDietz La Fond snapper sampler
    GravityCoreunspecified gravity corer
    PipeDredgeunspecified pipe dredge
    PistonCoreunspecified piston corer
    ShipekGrabShipek grab sampler
    VanVeenGrabVan Veen grab sampler
    UnIDCameraunidentified camera
    UnIDCoreunidentified corer
    UnIDCorerunidentified corer
    UnIDDeviceunidentified sampling device
    UnIDGrabunidentified grab sampler
    rcvy=no sampler information; recovery amount = XXX

    DataTypes
    Key to source-type of information in the following 20 fields (Source: processing software dbSEABED MNEs)

    ValueDefinition
    EExtracted data (directly measured, lab-based analytical data)
    PParsed data (numerical data from descriptive word-based data passed through fuzzy set theory filters)
    CCalculated data (numerical data from calculations using extracted and parsed data and various assumptions, published models, and empirical relationships)
    xno information

    Gravel
    % gravel in sample (Source: Udden-Wentworth size class)

    ValueDefinition
    -99no information

    Range of values
    Minimum:0
    Maximum:100
    Units:percent
    Resolution:1

    Sand
    % sand in sample (Source: Udden-Wentworth size class)

    ValueDefinition
    -99no information

    Range of values
    Minimum:0
    Maximum:100
    Units:percent
    Resolution:1

    Mud
    % mud in sample (Source: Udden-Wentworth size class)

    ValueDefinition
    -99no information

    Range of values
    Minimum:0
    Maximum:100
    Units:percent
    Resolution:1

    Clay
    % clay in sample (Source: Udden-Wentworth size class)

    ValueDefinition
    -99no information

    Range of values
    Minimum:0
    Maximum:100
    Units:percent
    Resolution:1

    Grainsize
    consensus of mean and median grainsize (Source: processing software dbSEABED MNEs)

    ValueDefinition
    -99no information

    Range of values
    Minimum:-7
    Maximum:11
    Units:phi
    Resolution:0.1

    Sorting
    Standard deviation (grainsize dispersion) (Source: processing software dbSEABED MNEs)

    ValueDefinition
    -99no information

    Range of values
    Minimum:0
    Maximum:5
    Units:phi
    Resolution:0.1

    SeabedCls
    Seabed Class: Arithmetic dominance of given compositional or feature terms or equivalents in lithologic or seafloor descriptions to defined Seafloor Class (Source: processing software dbSEABED MNEs)

    ValueDefinition
    BedformsBedforms: 'ripple', 'sandwave', 'scour'
    CalcCrustNodCalcareous crusts and nodules: 'limestone', 'calcareous concretion', carbonate nodule, 'calcareous crust'
    CalcPelagCalcareous pelagic: 'planktonic forams', 'nannofossils', 'pteropods', 'calcareous ooze'
    CarbMudCarbonate mud: 'calcareous mud', 'micrite', 'ooze', calcareous ooze'
    MnNoduleManganese nodules: 'manganese nodule', 'manganese crust', 'manganese stained', 'manganese oxide', manganese micronodule'
    PhosphatePhosphate: 'phosphorite'
    ShellShell: 'shell', 'mollusc', bivalve', 'gastropod', 'scaphopod', 'brachiopod'
    SilcPelagSiliceous pelagic: 'siliceous ooze', 'radiolaria', 'silicoflagellate', 'diatom'
    TerrigenousTerrigenous: 'terrigenous', 'heavy mineral', 'quartz', 'feldspar', 'mafic'
    VolcanicVolcanic: 'volcanic', 'basalt', 'pumice', 'mafic', 'tuff'
    -no dominant compositional or feature information

    ClsMship
    Class Membership; percent membership of sample to Seabed Class (Source: processing software dbSEABED MNEs)

    ValueDefinition
    -99no information

    Range of values
    Minimum:0
    Maximum:100
    Units:unitless
    Resolution:1.0

    FolkCode
    Grainsize classification (Source: Folk, Andrews, and Lewis, 1970)

    ValueDefinition
    (g)Mslightly gravelly mud
    (g)mSslightly gravelly muddy sand
    (g)sMslightly gravelly sandy mud
    (g)Sslightly gravelly sand
    Ggravel
    gMgravelly mud
    gmSgravelly muddy sand
    gSgravelly sand
    MMud
    mGmuddy gravel
    mSmuddy sand
    msGmuddy sandy gravel
    Ssand
    sGsandy gravel
    sMsandy mud
    Hhard bottom
    -not determinable

    RockMship
    Rock Membership; percent membership of sample to rock class (Source: processing software dbSEABED MNEs)

    Range of values
    Minimum:0
    Maximum:100
    Units:unitless
    Resolution:1.0

    WeedMship
    Weed Membership; percent membership of sample to Weed Class (Source: processing software dbSEABED MNEs)

    Range of values
    Minimum:0
    Maximum:100
    Units:unitless
    Resolution:1.0

    Carbonate
    carbonate in sample (Source: processing software dbSEABED MNEs)

    ValueDefinition
    -99no information

    Range of values
    Minimum:0
    Maximum:100
    Units:percent; may be fuzzy membership to carbonate class
    Resolution:0.1

    MunslCode
    Munsell Color Code (Source: GSA Rock-Color Chart, 1991)

    non-unique code based on HVC (Hue, Value, Chroma)

    Organic carbon
    organic carbon in sample (Source: processing software dbSEABED MNEs)

    ValueDefinition
    -99no information

    Range of values
    Minimum:0
    Maximum:100
    Units:percent; may be fuzzy membership to organic carbon set
    Resolution:0.1

    LgShearStr
    Log Shear Stress (Source: processing software dbSEABED MNEs)

    ValueDefinition
    -99no information

    Range of values
    Minimum:1
    Maximum:4
    Units:kiloPascals
    Resolution:0.01

    Porosity
    Porosity (Source: processing software dbSEABED MNEs)

    ValueDefinition
    -99no information

    Range of values
    Minimum:28
    Maximum:95
    Units:percent
    Resolution:0.01

    PWaveVel
    P-wave velocity (Source: processing software dbSEABED MNEs)

    ValueDefinition
    -99no information

    Range of values
    Minimum:1464
    Maximum:1788
    Units:meters/second
    Resolution:0.01

    Roughess
    Bottom roughness (Source: processing software dbSEABED MNEs)

    coded to espress the height and length of the bottom feature with the greatest aspect ratio

    LgCrShSt
    Log critical shear stress (Source: processing software dbSEABED MNEs)

    ValueDefinition
    -99no information

    Range of values
    Minimum:-1.33
    Maximum:1.7
    Units:log10 of tau, in kiloPascals
    Resolution:0.01

    SamplePhase
    Sample Phase/other information (Source: processing software dbSEABED MNEs)

    non-unique text of other data location 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?

    Contributors to this dataset are the original authors and agencies; at the USGS Santa Cruz and Menlo Park are Jane A. Reid, Kelly Halimeda Kilbourne, Carolynn Box, Tara Kneeshaw, Michael Field, and April Villagomez. Also Chris Jenkins at the University of Colorado, Boulder, CO and Mark Zimmermann, National Marine Fisheries Service, Seattle, WA

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

    U.S. Geological Survey
    c/o Jane A. Reid
    400 Natural Bridges Drive
    Santa Cruz, CA 95060

    (831) 427-4727 (voice)
    jareid@usgs.gov

Why was the data set created?

These data are provided to give information on surfical geology, including sediment texture and areas of no sediment cover. These data are intended for science researchers, students, policy makers, and the general public.

How was the data set created?

  1. From what previous works were the data drawn?

    DataSetKey 17: SCCWRP 94 (source 1 of 19)
    Southern California Coastal Water Research Project (SCCWRP), 1999, Data from the SCCWRP 1994 Pilot Project: Southern California Coastal Water Research Project, Westminster, CA.

    Online Links:

    Type_of_Source_Media: Digital
    Source_Contribution:
    point locations, color (Munsell code), %gravel, %sand, %silt, %clay, %mud, first moment, standard deviation, %gravel & sand, Folk & Ward skewness, Folk & Ward kurtosis, Inman mean, Inman sorting, Inman skewness, Inman skewness 2, Inman kurtosis, sand/mud, phi class grainsize, lithologic descriptions, biota

    DateSetKey 82, DataSetKey 187, DatasetKey 194: Deck 41 (source 2 of 19)
    National Oceanic Data Center, 1975, Deck 41: National Geophysical Data Center, Boulder, Colorado.

    Online Links:

    Other_Citation_Details:
    This is a compilation of more than 200 datasets, representing 36,000 data points worldwide. Some data in the geographic spatial domain are not included because they are included under the original source.
    Type_of_Source_Media: digital data
    Source_Contribution:
    citation information, MGGID number, nodcref number, consec number, ship-cruise, station, device, date, latitude, longitude, water_depth, depth_top, depth_bot, dominant lithology, secondary lithology, description,

    DataSetKey 204: NS&T MusselWatch (source 3 of 19)
    Center for Coastal Monitoring a, National Ocean Service, National Oceanic, Unpublished material, National Status and Trends Mussel Watch.

    Online Links:

    Other_Citation_Details:
    Part of an ongoing long-term database of sediment and bivalve tissue chemistry of over 80 organic and inorganic contaminants; bivalve histology, Clostridium perfringens, sewarge marker data. Over 300 sites in coastal waters of the United States and the Great Lakes.
    Type_of_Source_Media: digital
    Source_Contribution:
    Citation, latitude, longitude, date, province, operator, sample_top, sample_bottom, % gravel, % sand, % silt, %mud

    DataSetKey 216: Smithsonian (source 4 of 19)
    National Museum of Natural Hist, Smithsonian Institution, Unpublished material, Untitled: Compilation of NOS datasheets.

    Online Links:

    • None.

    Other_Citation_Details:
    unpublished database; Data received from Carla Moore, NGDC, in October 2001 via email.
    Type_of_Source_Media: digital
    Source_Contribution:
    Smithsonian identifier, catalog number, ship, project reference, collection date, location, latitude, longitude, water depth, sampler type, sample description, % gravel, % sand, % silt, % mud, % clay

    DataSetKey 237: MF-737 (source 5 of 19)
    U.S. Geological Survey, Vedder, J.G., Taylor, J.C., Arnal, R.E., and Bukry, David, 1976, Map showing locations of selected pre-Quaternary rock samples from California continental borderland: Miscellaneous Field Studies MS-737, U.S. Geological Survey, Menlo Park, CA.

    Other_Citation_Details: 3 maps
    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 250,000
    Source_Contribution:
    latitude, longitude, water_depth, lithologic description, age/stage

    DataSetKey 238: OFR92-342 (source 6 of 19)
    U.S. Geological Survey, Gardner, J.V., Dean, W.E., and Kayen, R., 1992, Data from USGS Cruise F2-92 of central and southern CA (initial descriptions): Open-file Report 92-342, U.S. Geological Survey, Menlo Park, CA.

    Online Links:

    Type_of_Source_Media: paper
    Source_Contribution:
    Site name, latitude, longitude, water depth, core recovery length, sample top, sample bottom, lithology description, Munsell color code

    DataSetKey 242: MGG 09005058 (source 7 of 19)
    U.S. Naval Civil Engineering Laboratory (NCEL), Valent, P.J., Lee, H.J., and National Geophysical Data Center, 1971, Report Number 1: NCEL Core Data - Santa Barbara Channel Area; Reconnaissance study for the proposed California Undersea Aqueduct: U.S. Navy, Point Hueneme, CA.

    Online Links:

    Other_Citation_Details: Bureau of Reclamation, Denver, CO, Contract number 14-06-D-7210
    Type_of_Source_Media: digital
    Source_Contribution:
    Site name, latitude, longitude, water depth, sampling device, site date, sample top, sample bottom, % gravel, % sand, % silt, % clay

    DataSetKey 261: MGG 09185006 (source 8 of 19)
    U.S. Navy Oceanographic Office (NavOceanO), Coleman, Jess B. , Grimes, Alvin R. , and National Geophysical Data Center, 1964, Lab Item 242: A summary of sediment size, composition, and engineering properties for PMR Project 5R-006.

    Online Links:

    Type_of_Source_Media: digital
    Source_Contribution:
    Site name, latitude, longitude, water depth, sampling device, site date, core recovery length, sample top, sample bottom, % gravel, % sand, % silt, % clay, median grainsize, micron grainsize, quartile sorting, quartile skewness, carbonate %, organic carbon %, lithologic description, odor, Shepard class, Munsell color code, phi size class percentages.

    DataSetKey 262: MGG 09005019 (source 9 of 19)
    U.S. Navy Oceanographic Office (NavOceanO), Hill, David S. , Oser, Robert K. , Rohrhirsch, Joseph M. , and National Geophysical Data Center, 1965, Lab Item 227: A summary of sediment size, composition, and engineering properties for PMR project R-006.

    Online Links:

    Other_Citation_Details: Bureau of Reclamation, Denver, CO, Contract number 14-06-D-7210
    Type_of_Source_Media: digital
    Source_Contribution:
    Site name, latitude, longitude, water depth, sampling device, site date, sample top, sample bottom, % gravel, % sand, % silt, % clay

    DataSetKey 265: MGG 09695001 (source 10 of 19)
    U.S. Navy Oceanographic Office (NavOceanO), Achstetter, Eugene V. , Kelly, Eugene V. , Loomis, P. Burr , McKellar, Scott M. , and National Geophysical Data Center, 1970, Lab Item 398: A summary of sediment size, composition, and engineering properties of three cores from the eastern Pacific.

    Online Links:

    Type_of_Source_Media: digital
    Source_Contribution:
    Site name, latitude, longitude, water depth, sampling device, site date, core recovery length, sample top, sample bottom, % gravel, % sand, % silt, % clay, median grainsize, micron grainsize, quartile sorting, quartile skewness, carbonate %, organic carbon %, lithologic description, odor, Shepard class, Munsell color code, phi size class percentages.

    DataSetKey 268: Scholl MS 1959 (source 11 of 19)
    Scholl, David W. , 1959, Geology and surrounding recent marine sediments of Anacapa Island: University of Southern California, Los Angeles, CA.

    Other_Citation_Details: Masters Thesis
    Type_of_Source_Media: Paper
    Source_Contribution:
    Site name, latitude, longitude, sampling device, site date, median grainsize (phi), undefined sorting, carbonate %, formation, lithologic description, geological age description

    DataSetKey 283: SEDDATA (source 12 of 19)
    University of Southern California, and Gorsline, Donn, Unpublished material, SEDDATA database.

    Other_Citation_Details:
    Unpublished digital database of government-funded samples from University of Southern California, including some Allan Hancock Foundation samples. May overlap data from Emery and Hulsemann 1964, Barnes 1970, Smith 1970, Wright 1967, and Gorsline 1958, also given in this report. Database emailed to Jane Reid, USGS, by Donn Gorsline on July 31, 2001
    Type_of_Source_Media: digital
    Source_Contribution:
    sitename, latitude, longitude, %gravel, %sand, %silt, %clay, average grainsize, standard deviation, skewness, kurtosis, % carbonate, %organic carbon, bulk density

    DataSetKey 284: Smith_PhD (source 13 of 19)
    Smith, Stephen V. , 1970, Calcium carbonate budget of the southern California borderland: HIG 70-11, University of Southern California, Los Angeles, CA.

    Other_Citation_Details:
    Locations may duplicate the SEDDATA database, also given in this report.
    Type_of_Source_Media: paper
    Source_Contribution:
    Sitename, latitude, longitude, %aragonite, %dolomite, %Mg_calcite in carbonate

    DataSetKey 284: Barnes_PhD (source 14 of 19)
    Barnes, Peter W. , 1970, Marine geology and oceanography of Santa Cruz basin off southern California.

    Other_Citation_Details:
    PhD. dissertation, University of Southern California. Locations and data may overlap the SEDDATA database, also given here.
    Type_of_Source_Media: paper
    Source_Contribution:
    Site name, latitude, longitude, mean grainsize, statistical skewness, statistical kurtosis, % carbonate, % organic carbon, %nitrogen

    DataSetKey 286: Emery_&_Shepard_1941 (source 15 of 19)
    Emery, K.O., Shepard, F.P., and Scripps Institution of Oceanography, 1941, Lithology of the sea floor off of Southern California: Bulletin of the Geological Society of America v. 56, pp. 431-473, Geological Society of America, need to get.

    Type_of_Source_Media: paper
    Source_Contribution:
    Site name, latitude, longitude, water depth, sampling device, lithologic description, number, size, and shape of samples

    DataSetKey 288: Emery_&_Hulsemann_1963 (source 16 of 19)
    Emery, K.O., and Hulsemann, Jobst, 1963, Submarine canyons of southern California: Allan Hancock Pacific Expeditions v. 27, pt. 1, University of Southern California, Los Angeles, CA.

    Other_Citation_Details: Also at NGDC as MGG 27025001; not used here
    Type_of_Source_Media: paper
    Source_Contribution:
    Site name, latitude, longitude, water depth, lithologic descriptions, sedimentary environment, %gravel, % sand, % silt, % clay, % mud, median grainsize, quartile sorting, % carbonate, % organic carbon, % nitrogen

    DataSetKey 303: Wright_PhD_1967 (source 17 of 19)
    Wright, Frederick Fanning , 1967, The marine geology of San Miguel Gap off Point Conception, California: University of Southern California, Los Angeles, CA.

    Other_Citation_Details:
    PhD. dissertation, University of Southern California Data and locations may overlap the SEDDATA database, also given here.
    Type_of_Source_Media: paper
    Source_Contribution:
    Site name, latitude, longitude, water depth, sampling device, sampler recovery length, lithologic description, sample top, sample bottom, % gravel, % sand, % silt, % clay, median grainsize, Munsell color code, bulk density, petrographic analyses.

    DataSetKey 304: Gorsline_PhD_1958 (source 18 of 19)
    Gorsline, Donn S. , 1958, Marine geology of San Pedro and Santa Monica basins and vicinity, California: University of Southern California, Los Angeles, CA.

    Other_Citation_Details:
    PhD. dissertation, University of Southern California. Locations and data may overlap the SEDDATA database, also given here
    Type_of_Source_Media: paper
    Source_Contribution:
    Site name, latitude, longitude, water depth, sampling device, sample top, sample bottom,% gravel, % sand, % silt, % clay, % mud, median grainsize, first quartile sorting, third quartile sorting, % carbonate, % nitrogen, lithologic description, petrographic analyses

    DataSetKey 348: Bight98 (source 19 of 19)
    Southern California Coastal Water Research Project (SCCWRP), 2004, Bight '98 Survey: SCCWRP, Westminster, CA.

    Online Links:

    Other_Citation_Details:
    grainsize data emailed to Jane Reid, USGS, by Larry Cooper, SCCWRP, October 2004 grainsize data linked to location information in GrabEventData file by hand, using the last location given per station. This is following the original metadata that stated other data would be taken from the earlier sampling attempts per station.
    Type_of_Source_Media: digital
    Source_Contribution:
    Site name, latitude, longitude, water depth, sampler, date, time, color, seafloor description, odor, median grainsize, mean grainsize, standard deviation,% organic carbon, % nitrogen, phi grainsize classes.

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

    Date: (process 1 of 1)
    Data were digitized as needed and hand-edited into dbSEABED format. Data quality and assessment performed with dbSEABED relational database program (RDBi, version 1/6/05) to ensure correctness of formatting. Also tested data with plausibility filters to ensure reasonable of data, (RDBi, version 1/6/05). Iteratively processed through dbSEABED filtering and mining software program (MNEs, version 2/10/05) to ensure completeness of formatting and meaning. Combined dbSEABED MNEs outputs using dbSEABED unifying program (ONEg, version 9/7/04, extracted data preferentially chosen). Hand-edited to remove downcore data and duplicate analyses; Subsurface data are not included. Data were iteratively tested in a GIS for locational correctness, consistency, and appropriateness of results.

    Person who carried out this activity:

    Jane A. Reid
    U.S. Geological Survey
    400 Natural Bridges Drive
    Santa Cruz, CA 95060

    (831) 427-4727 (voice)
    jareid@usgs.gov

    Data sources used in this process:

    Data sources produced in this process:

    • scasmpl.txt

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

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

  1. How well have the observations been checked?

    Accuracy of each attribute is dependent on the accuracy of the lineage data.

  2. How accurate are the geographic locations?

    Locational accuracy is dependent on the accuracy of the navigational technique from the lineage source and may vary from 0.005km (differential GPS) in more recent surveys to greater than 2 km based on radar, Loran, or dead reckoning in older surveys. Users of the data should use their own criteria for assessing the accuracy of the locations.

  3. How accurate are the heights or depths?

    Locational accuracy is dependent on the accuracy of the navigational technique from the lineage source. Users of the data should use their own criteria for assessing the accuracy of the locations.

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

    Only data from the topmost portion of the sample are published (<0.05 m top depth). Downcore information exists for many of the samples. Additional useable data may exist in this area; the authors appreciate any information and leads.

  5. How consistent are the relationships among the observations, including topology?

    Data in usSEABED are based on the observations and analyses of others, filtered through a unifying and mining software. Each source report varies in what is recorded and in what format. Only those observations that are recorded can be filtered and mined; only presence (not absence) or information can be noted.

    Users of the data should note the code in the field "DataTypes" to determine the origin of the information in the following fields. E = based directly on analytical data and are very reliable as the data were measured directly; P = based on verbal descriptive data and are less reliable and may represent the entire sample (including stones, shells, biota, and other non-typical textural data). Values are determined using fuzzy-set-theory-based filters passed over qualitative data. Values have been adjusted to match the mean values of analytical data. C = calculated from other information and various assumptions. These are the least reliable data due to the reliance on fuzzy set theory and assumed values for constants and appropriate use of equations to derive values. x = no information

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:
Cite the U.S. Geological Survey and its partners as originators of the dataset.

  1. Who distributes the data set? (Distributor 1 of 1)

    United States Geological Survey (USGS)
    c/o Guy R. Cochrane
    Geophysicist
    USGS, 400 Natural Bridges Drive
    Santa Cruz, CA 95060-5792
    USA

    (831) 427-4754 (voice)
    (831) 427-4748 (FAX)
    gcochrane@usgs.go

  2. What's the catalog number I need to order this data set?

  3. What legal disclaimers am I supposed to read?

    Please recognize the U.S. Geological Survey (USGS) as the source of this information.

    Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data.

    The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified:
Last Reviewed: 2005
Metadata author:
Jane A. Reid
U.S. Geological Survey
400 Natural Bridges Drive
Santa Cruz, CA 95060

(831) 427-4727 (voice)
jareid@usgs.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata ("CSDGM version 2") (FGDC-STD-001-1998)

Generated by mp version 2.8.6 on Fri Dec 16 16:44:02 2005