Geologic map of the Ridgefield quadrangle, Clark and Cowlitz Counties, Washington

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Russell C. Evarts
Originator: Jessica Block (Database Editor)
Originator: Philip Dinterman (Database Editor)
Publication_Date: 2004
Title:
Geologic map of the Ridgefield quadrangle, Clark and Cowlitz Counties, Washington
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage: <http://pubs.usgs.gov/sim/2004/2844>
Description:
Abstract:
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits of the Ridgefield 7.5-minute quadrangle. The database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U.S. Geological Survey. The scale of the source maps limits the spatial resolution (scale) of the database to 1:24,000 or smaller.
Purpose:
This database and accompanying plot files depict the distribution of geologic materials and structures at a regional (1:24,000) scale. The report is intended to provide geologic information for the regional study of materials properties, earthquake shaking, landslide potential, mineral hazards, seismic velocity, and earthquake faults. In addition, the report contains new information and interpretations about the regional geologic history and framework. However, the regional scale of this report does not provide sufficient detail for site development purposes.
Supplemental_Information:
DIGITAL COMPILATION-Several different feature classes were generated within a geodatabase during the construction of the Ridgefield quadrangle geologic map. The topographic base map remains as a digital raster graphic (DRG) and is overlain on the geology feature class in ArcMap at a 60% transparency level. Some custom menus were used to project, transform, edit, tag, and build points in the map. A digital layout or map collar was made with Adobe Illustrator. The map was exported from the layout view in ArcMap as an Adobe Illustrator file and added to a single Adobe Illustrator file that also contained the description of map units, correlation of map units, cross sections, and an index map. Differences between the maps as they appear in the final map sheet and as they appear in the either the .mxd or .pmf files represent changes made in the Adobe Illustrator file to the symbology only and do not reflect any changes in the actual source data. The map is in UTM projection, zone 10, meters, and 1:24,000 scale. The explanatory pamphlet was saved to PDF from Microsoft Word.

BASE MAP-The base map for the digital compilation is a Digital Raster Graphic (DRG) of the U.S. Geological Survey, 1:24,000-scale topographic map of the Ridgefield 7.5' quadrangle (1990), which has a 10-foot contour interval. The image inside the map neatline is georeferenced to the Universal Transverse Mercator projection. The horizontal positional accuracy and datum of the DRG matches the accuracy and datum of the source map. The base map layer is a digital image, but no information other than location is attached to the lines. The base map is provided for reference only.

SPATIAL RESOLUTION-Uses of this digital geologic map should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. The fact that this database was edited at a scale of 1:24,000 means that higher resolution information is not present in the dataset. Plotting at scales larger than 1:24,000 will not yield greater real detail, although it may reveal fine-scale irregularities below the intended resolution of the database. Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of these data.

Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2004
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -122.750558
East_Bounding_Coordinate: -122.624160
North_Bounding_Coordinate: 45.875344
South_Bounding_Coordinate: 45.749658
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: Puget-Willamette Lowland
Theme_Keyword: geology
Theme_Keyword: bedrock geology
Theme_Keyword: surficial geology
Theme_Keyword: geologic history
Theme_Keyword: Columbia River Basalt Group
Theme_Keyword: Tertiary volcanic stratigraphy
Theme_Keyword: Ridgefield
Theme_Keyword: Pacific Northwest
Theme_Keyword: Washington
Theme_Keyword: Cowlitz County
Theme_Keyword: Clark County
Theme_Keyword: Troutdale Formation
Theme_Keyword: Missoula floods
Access_Constraints: None
Use_Constraints:
Uses of this digital geologic map should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. The fact that this database was edited for a scale of 1:24,000 means that higher resolution information is not present in the dataset. Plotting at scales larger than 1:24,000 will not yield greater real detail, although it may reveal fine-scale irregularities below the intended resolution of the database. Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of these data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Database Coordinator
Contact_Organization: United States Geological Survey
Contact_Address:
Address_Type: mailing address
Address: 345 Middlefield Rd
Address: MS 973
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025
Country: USA
Contact_Voice_Telephone: (650) 329-4935
Contact_Facsimile_Telephone: (650) 329-4936
Contact_Electronic_Mail_Address: kwheeler@usgs.gov
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Longitude_of_Central_Meridian: -123.000000
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Ellipsoid_Name: Clarke 1866
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Attribute_Definition: Geologic unit description
Attribute_Definition_Source: Author
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: af
Enumerated_Domain_Value_Definition:
Artificial fill (Holocene)-Unconsolidated soil, sand, gravel, and rock used to construct raised road and railroad beds, and levees on Columbia River floodplain
Enumerated_Domain:
Enumerated_Domain_Value: Qls
Enumerated_Domain_Value_Definition:
Landslide deposits (Holocene)-Scattered small slides and slumps generated by failure of steep bluffs underlain by poorly consolidated sedimentary units (Qfs, Tsr). Include active hummocky surfaced slump along railroad grade parallel to Lake River about 4.5 km south of Ridgefield
Enumerated_Domain:
Enumerated_Domain_Value: Qa
Enumerated_Domain_Value_Definition:
Alluvium (Holocene)-Unconsolidated sediments underlying modern floodplains of Columbia, Lewis, and East Fork Lewis Rivers and local accumulations along valley bottoms of small tributary streams. Includes deposits of small alluvial fans along shore of Mud Lake. Columbia River floodplain deposits are poorly sorted to well-sorted, massive to laminated, commonly cross-stratified sand, silt, and minor gravel; locally includes fine-grained lacustrine, eolian, and organic-rich marsh deposits. Lewis River deposits are similar but coarser and include beds of reworked volcanic debris derived from Mount St. Helens. Deposits of East Fork Lewis River include gravel, sand, and silt. Gravel composed largely of volcanic clasts eroded from Cascade Range or reworked from older sediments (Ttf, QTc); sand and silt chiefly reworked cataclysmic flood deposits (Qfs). Alluvium of small streams consists of poorly to moderately sorted, crudely stratified silt, sand, and gravel, mostly reworked from older, weakly consolidated sedimentary units
Enumerated_Domain:
Enumerated_Domain_Value: Qoa
Enumerated_Domain_Value_Definition:
Older alluvium (Holocene)-Unconsolidated, thickly bedded, poorly sorted, clast-supported pebble and cobble gravel and minor lenses of coarse sand forming small terraces along East Fork Lewis River with surfaces 6 to 20 m above modern floodplain. Dominated by clasts of volcanic rocks eroded from Cascade Range; also contains sparse clasts of Columbia River Basalt Group and quartzite. Not covered by cataclysmic flood deposits (Qfs), so deposition postdates latest Pleistocene floods
Enumerated_Domain:
Enumerated_Domain_Value: Qfs
Enumerated_Domain_Value_Definition:
Cataclysmic-flood deposits, fine-grained facies (Pleistocene)-Unconsolidated clay, silt, and fine to medium sand; grain size decreases gradually to north. Throughout quadrangle mantle low-relief surfaces below about 300 ft (90 m) elevation but above Holocene floodplains. Rare fresh exposures reveal rhythmite beds several centimeters thick, each bed probably the product of a separate flood (Waitt, 1980, 1985, 1994; Clague and others, 2003), but in most exposures deposit is oxidized light brown, and bedding is inconspicuous. Composed largely of quartz, feldspar, and conspicuous muscovite, which indicate deposition by Columbia River rather than by local streams. Interpreted as slack-water deposits of large floods initiated by failure of ice dam at Glacial Lake Missoula in western Montana during the late Pleistocene (Bretz, 1925, 1959; Bretz and others, 1956; Waitt, 1980, 1985, 1994, 1996; Baker and Bunker, 1985; Atwater, 1986; O'Connor and Baker, 1992; Benito and O'Connor, 2003). Floodwaters, hydraulically dammed by relatively narrow constriction of Columbia River valley north of quadrangle, ponded in Portland Basin, and deposited suspended sediment load (Trimble, 1963). Water-well drillers' logs indicate unit is typically about 30 to 35 m thick south of East Fork Lewis River; thin unmapped deposits of similar character locally mantle area north of East Fork Lewis River to elevations as high as 350 ft (120 m). Radiocarbon ages and tephrochronologic data from outside the map area indicate floods occurred between about 17,000 and 13,000 14C years B.P. (Waitt, 1994; Clague and others, 2003)
Enumerated_Domain:
Enumerated_Domain_Value: Qtd
Enumerated_Domain_Value_Definition:
Terrace deposits (Pleistocene)-Unconsolidated, poorly sorted sandy pebble gravel and lithic sand, forming small, Qfs-veneered terrace remnants with surface elevations of 110 to 140 ft (33 to 43 m) along Lewis River between Paradise Point and Mud Lake. Clast population dominated by Tertiary volcanic rocks of Cascade Range derivation, consistent with a Lewis River source. Considered correlative with small terrace about 3 km to north in Woodland quadrangle (Evarts, 2003a) that contains ash beds probably deposited between 350 and 400 ka (A.M. Sarna-Wojcicki, written commun., 2000)
Enumerated_Domain:
Enumerated_Domain_Value: QTc
Enumerated_Domain_Value_Definition:
Conglomerate (Pleistocene and (or) Pliocene)-Semi-consolidated pebble and cobble gravel; thick-bedded, poorly sorted to moderately well-sorted, clast-supported, commonly imbricated. Contains minor lenses, generally <2 m thick, of basaltic or quartzose sand; cemented by clay and limonite. Well exposed in gravel pits near Ridgefield; water-well data and scattered outcrops demonstrate that unit forms continuous stratum 20-40 m thick beneath cataclysmic flood deposits (Qfs) throughout area south of East Fork Lewis River; somewhat thicker (to 60 m) beneath hills north of Packard Creek; laps out against Troutdale Formation and Paleogene bedrock north of East Fork. Well-rounded clasts to 25 cm diameter of Columbia River Basalt Group dominate unit but quartzite pebbles and scattered larger clasts of Cascadian volcanic rocks locally present, including subangular blocks up to 80 cm across of andesite in Allen Canyon. Some openwork gravel, but most gravel in unit possesses sandy matrix that is compositionally similar to interbedded sand lenses. Proportion of subrounded to subangular Cascadian volcanic rocks increases northeast, where gravel beds are generally thinner and more poorly sorted. Much of unit lithologically similar to Troutdale Formation, but differs in its thinner weathering profile, more pronounced clast imbrication (invariably indicating northward transport), and presence of widely scattered but conspicuous clasts of olivine basalt and local sandy interbeds of yellow-brown, fluvially reworked basaltic hyaloclastite. Age poorly known; probably predominantly Pliocene but upper part may include lower Pleistocene strata. Includes deposits assigned to the Troutdale Formation by Mundorff (1964); contiguous with deposits in adjacent Battle Ground quadrangle mapped as alluvial-fan member of Troutdale Formation by Howard (2002). Presence of olivine-basalt clasts suggests correlation with informal upper member of Troutdale Formation in the Columbia Gorge as defined by Tolan and Beeson (1984), inferred to be of Pliocene age
Enumerated_Domain:
Enumerated_Domain_Value: Ttf
Enumerated_Domain_Value_Definition:
Troutdale Formation (Pliocene and (or) Miocene)-Semi-consolid-ated, massive, poorly sorted to well-sorted, openwork and sandstone-matrix, pebble and cobble conglomerate with sparse lenses of friable sandstone. Underlies upper part of broad, south- to southwest-sloping surface north of East Fork Lewis River, Mundorff's (1964) Troutdale bench. Clast population dominated by well-rounded cobbles of the Columbia River Basalt Group; typically includes some light-colored granitic and quartzofeldspathic metamorphic rocks, conspicuous white to light-gray, Fe-oxide stained quartzite, and scarce cobbles of pyroxene or hornblende andesite. Composition of sandstone interbeds and matrix of conglomerate ranges from basaltic grit to micaceous arkose compositionally similar to beds of Sandy River Mudstone, indicating source areas east of the Cascade Range and deposition by ancestral Columbia River. In most places, upper several meters is thoroughly weathered to reddish-brown clayey soil; in such areas, presence of scattered, Fe-stained, brown to yellow quartzite pebbles on surface is the only indicator of protolith. Logs of water wells indicate unit is as much as 70 m thick and that weathering extends to depths exceeding 30 m (Mundorff, 1964; Swanson and others, 1993). Equivalent to upper member of Troutdale Formation of Mundorff (1964) and to quartzite-clast member of Troutdale Formation of Howard (2002)
Enumerated_Domain:
Enumerated_Domain_Value: Tsr
Enumerated_Domain_Value_Definition:
Sandy River Mudstone (Miocene)-Poorly indurated arkosic, tuffaceous, and carbonaceous sandstone, siltstone, claystone, and minor pebble conglomerate. Exposed beneath Troutdale Formation in creek valleys of northeast part of quadrangle, beneath unnamed conglomerate (QTc) in southwest bank of East Fork Lewis River and in valleys of small creeks to the west, and along railroad grade north of Ridgefield. Sedimentary structures in sandy horizons indicate a fluvial depositional environment; finer grained deposits probably represent overbank settings on broad floodplain. South of East Fork Lewis River, unit consists largely of friable quartzofeldspathic sand and silt, bluish gray where fresh but weathers rapidly to light brown to tan; commonly is limonite cemented; composed of subangular grains of quartz, feldspar, various rock fragments, muscovite and minor biotite, tourmaline, magnetite, hornblende. Considered correlative with Sandy River Mudstone of Trimble (1963); equivalent to lower member of Troutdale Formation of Mundorff (1964) and to fine-grained member of Troutdale Formation of Howard (2002)
Enumerated_Domain:
Enumerated_Domain_Value: Tgsb
Enumerated_Domain_Value_Definition:
Grande Ronde Basalt (Miocene)Light- to dark-gray flows of tholeiitic basaltic andesite; vesicular to microvesicular, aphyric to microphyric to very sparsely plagioclase-phyric; exhibit relatively low-TiO2 contents (table 1) characteristic of the Grande Ronde Formation of the Columbia River Basalt Group (Mangan and others, 1986; Beeson and others, 1989; Reidel and others, 1989). Found as erosional remnants banked against Paleogene bedrock along north bank of East Fork Lewis River between La Center and Jenny Creek and along railroad grade 2-3 km north of Ridgefield; overlain by Sandy River Mudstone, Troutdale Formation, and unnamed conglomerate (Tsr, Ttf, and QTc). Textures resemble those described by Long and Wood (1986) for basalt flows on the Columbia Plateau. Basalt erupted from vents in eastern part of Plateau and entered northwestern Oregon and southwestern Washington through a wide gap in the Cascade Range (Tolan and others, 1989; Wells and others, 1989). Reidel and others (1989) divided the Grande Ronde Basalt on the Columbia Plateau into several informal members on basis of lithologic, chemical and paleomagnetic properties; all exposures of Grande Ronde Basalt in this quadrangle are assigned to member of Sentinel Bluffs of Reidel and others, (1989), which is within the N2 magnetostratigraphic unit of Swanson and others (1979). Terminology is that of Reidel, 1998) Member of Sentinel BluffsBasalt characterized by relatively high MgO contents (about 4.4 to 4.8 wt percent) and normal magnetic polarity (J.T. Hagstrum, written commun., 2000, 2002). Eroded flow remnants at least 20 m thick and exhibit well-developed colonnade and entablature jointing. Commonly contains sparse plagioclase and rare olivine phenocrysts as large as 4 mm in an intersertal to intergranular groundmass of lathlike plagioclase, granular clinopyroxene, skeletal Fe-Ti oxide crystals, and scarce equant olivine grains in abundant dark glass. Chemical analyses (table 1) and paleomagnetic measurements (J.T. Hagstrum, written commun., 2000, 2002) indicate that the basalt near Jenny Creek and that north of Ridgefield belong to separate flows. 40Ar/39Ar age determinations by Long and Duncan (1983) from this unit on Columbia Plateau indicate age of 15.6±0.2 Ma
Enumerated_Domain:
Enumerated_Domain_Value: Ta
Enumerated_Domain_Value_Definition:
Andesite (Eocene)-Flows and flow breccia of medium to dark gray, aphyric to porphyritic pyroxene andesite exposed in cliffy outcrops along East Fork Lewis River near Paradise Point. Unit may locally include small unmapped dacitic flows, interbedded volcaniclastic rocks, and andesitic dikes. Individual flows typically less than 10 m thick. Andesites contain phenocrysts of plagioclase (0-20 percent; 1 to 5 mm long), augite (0-5 percent; <0.5 to 1 mm across), and Fe-Ti oxide (<0.5 percent; £1 mm across), with or without hypersthene (0-3 percent; 1 to 3 mm long) in an intersertal or pilotaxitic groundmass. Variable but generally minor alteration to clay minerals, quartz, and carbonate
Enumerated_Domain:
Enumerated_Domain_Value: Tvb
Enumerated_Domain_Value_Definition:
Volcanic breccia (Eocene)-Massive volcanic diamictite, up to 50 m thick, exposed in cliffs along both banks of East Fork Lewis River between La Center and Paradise Point. Polylithologic with ashy matrix, but dominated by angular blocks, as large as 2 m across, of variably vesicular andesite similar to lava flows of unit Ta. Unit also includes flaky, light-green to light yellowish-brown lapilli tuff interbedded with andesite flows west of Jenny Creek that consists of aphyric pumice clasts and less abundant sparsely phyric andesitic to dacitic lithic clasts in matrix of abundant ash; original vitric material totally replaced by clay minerals and zeolites
Enumerated_Domain:
Enumerated_Domain_Value: Tvs
Enumerated_Domain_Value_Definition:
Volcaniclastic sedimentary rocks (Eocene)-Thin lenses, typically less than 5 m thick, of epiclastic volcaniclastic rocks interbedded with andesitic flows west of Jenny Creek. Predominantly massive, clast-supported, pebbly breccia composed of angular andesitic to dacitic lithic and pumiceous lapilli; thin-bedded, light-gray to light-green, somewhat carbonaceous siltstone, claystone, and sandstone present in isolated exposure along north shore of East Fork Lewis River below outcrops of Grande Ronde Basalt. Original glass completely replaced by fine-grained smectite, zeolites, or carbonates; pore space filled with clinoptilolite, calcite, or cristobalite
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Attribute_Definition_Source: ESRI
Attribute:
Attribute_Label: LTYPE
Attribute_Definition: Structural features description
Attribute_Definition_Source: Author
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: cross section
Enumerated_Domain_Value_Definition: Location of author's cross section lines
Enumerated_Domain:
Enumerated_Domain_Value: dike, andesite
Enumerated_Domain:
Enumerated_Domain_Value: f.a., anticline, concealed
Enumerated_Domain_Value_Definition:
fold axis, anticline concealed by younger unit positional accuracy uncertain but probably generally within 5 mm at 1:24,000 (120 m on the ground)
Enumerated_Domain:
Enumerated_Domain_Value: f.a., anticline, inferred
Enumerated_Domain_Value_Definition:
fold axis, anticline, exists but location inferred from indirect evidence
Enumerated_Domain:
Enumerated_Domain_Value: f.a., anticline, inferredm
Enumerated_Domain_Value_Definition:
fold axis, anticline, exists but location inferred from indirect evidence, marker symbol showing anticline symbol
Attribute:
Attribute_Label: Shape_Length
Attribute_Definition: Length of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Detailed_Description:
Entity_Type:
Entity_Type_Label: rdg_stx_pt
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: AREA
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Area is always zero for point coverages. Values are automatically generated.
Attribute:
Attribute_Label: PERIMETER
Attribute_Definition: Perimeter of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Perimeter is always zero for point coverages. Values are automatically generated.
Attribute:
Attribute_Label: RDG_STX5C_
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: RDG_STX_ID
Attribute_Definition: User-defined feature number.
Attribute_Definition_Source: ESRI
Attribute:
Attribute_Label: PTTYPE
Attribute_Definition: Geologic bedding description
Attribute_Definition_Source: author
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: bedding
Enumerated_Domain_Value_Definition: Strike and dip of beds
Enumerated_Domain:
Enumerated_Domain_Value: horizontal bedding
Enumerated_Domain_Value_Definition: Strike and dip of horizontal beds
Attribute:
Attribute_Label: DIP
Attribute:
Attribute_Label: STRIKE
Attribute:
Attribute_Label: PLOT
Attribute:
Attribute_Label: POLYGONID
Attribute:
Attribute_Label: SCALE
Attribute:
Attribute_Label: ANGLE
Detailed_Description:
Entity_Type:
Entity_Type_Label: Anno_5_12
Detailed_Description:
Entity_Type:
Entity_Type_Label: rdg_stx_ptAnno
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: SHAPE
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: FeatureID
Attribute:
Attribute_Label: ZOrder
Attribute:
Attribute_Label: AnnotationClassID
Attribute:
Attribute_Label: Element
Attribute:
Attribute_Label: SHAPE_Length
Attribute_Definition: Length of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: SHAPE_Area
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Detailed_Description:
Entity_Type:
Entity_Type_Label: Anno_5_12
Detailed_Description:
Entity_Type:
Entity_Type_Label: rdg_pts_pt
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: AREA
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Area is always zero for point coverages. Values are automatically generated.
Attribute:
Attribute_Label: PERIMETER
Attribute_Definition: Perimeter of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Perimeter is always zero for point coverages. Values are automatically generated.
Attribute:
Attribute_Label: RDG_PTS1_
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: RDG_PTS_ID
Attribute_Definition: User-defined feature number.
Attribute_Definition_Source: ESRI
Attribute:
Attribute_Label: PTTYPE
Attribute_Definition: location of features
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: glacial erratic
Enumerated_Domain_Value_Definition: location of glacial erratic
Enumerated_Domain:
Enumerated_Domain_Value: well
Enumerated_Domain_Value_Definition: location of well
Attribute:
Attribute_Label: POLYGONID
Attribute:
Attribute_Label: SCALE
Attribute:
Attribute_Label: ANGLE
Detailed_Description:
Entity_Type:
Entity_Type_Label: rdg_chm_pt
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: AREA
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Area is always zero for point coverages. Values are automatically generated.
Attribute:
Attribute_Label: PERIMETER
Attribute_Definition: Perimeter of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Perimeter is always zero for point coverages. Values are automatically generated.
Attribute:
Attribute_Label: RDG_CHM5_
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: RDG_CHM_ID
Attribute_Definition: User-defined feature number.
Attribute_Definition_Source: ESRI
Attribute:
Attribute_Label: PTTYPE
Attribute_Definition: Type of chemical analysis
Attribute_Definition_Source: Author
Attribute:
Attribute_Label: SAMPNO
Attribute_Definition: Sample number used in field collection
Attribute_Definition_Source: Author
Attribute:
Attribute_Label: MAP_NO
Attribute_Definition: Number designation on map
Attribute:
Attribute_Label: LATITUDE
Attribute_Definition: Measurement of latitude
Attribute:
Attribute_Label: LONGITUDE
Attribute_Definition: Measurement of longitude
Attribute:
Attribute_Label: MAP_UNIT
Attribute_Definition: Geologic unit sample is located within
Attribute:
Attribute_Label: ROCK_TYPE
Attribute_Definition: Physical type of rock from which sample was taken
Attribute:
Attribute_Label: SIO2
Attribute_Definition: Silicon concentration expressed as weight percent oxide
Attribute:
Attribute_Label: TIO2
Attribute_Definition: Titanium concentration expressed as weight percent oxide
Attribute:
Attribute_Label: AL2O3
Attribute_Definition: Aluminum concentration expressed as weight percent oxide
Attribute:
Attribute_Label: FEO
Attribute_Definition: Ferrous iron concentration expressed as weight percent oxide
Attribute:
Attribute_Label: MNO
Attribute_Definition: Manganese concentration expressed as weight percent oxide
Attribute:
Attribute_Label: MGO
Attribute_Definition: Magnesium concentration expressed as weight percent oxide
Attribute:
Attribute_Label: CAO
Attribute_Definition: Calcium concentration expressed as weight percent oxide
Attribute:
Attribute_Label: NA2O
Attribute_Definition: Sodium concentration expressed as weight percent oxide
Attribute:
Attribute_Label: K2O
Attribute_Definition: Potassium concentration expressed as weight percent oxide
Attribute:
Attribute_Label: P2O5
Attribute_Definition: Phosphorous concentration expressed as weight percent oxide
Attribute:
Attribute_Label: TOTAL
Attribute_Definition: Total of weight percent oxides
Attribute:
Attribute_Label: SIO2_N
Attribute_Definition:
Silicon expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: TIO2_N
Attribute_Definition:
Titanium expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: AL2O3_N
Attribute_Definition:
Aluminum expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: FEO_N
Attribute_Definition:
Ferrous Iron expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: MNO_N
Attribute_Definition:
Manganese expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: MGO_N
Attribute_Definition:
Magnesium expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: CAO_N
Attribute_Definition:
Calcium expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: NA2O_N
Attribute_Definition:
Sodium expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: K2O_N
Attribute_Definition:
Potassium expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: P2O5_N
Attribute_Definition:
Phosphorous expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: TEXTURE
Attribute_Definition: Rock and groundmass texture
Attribute:
Attribute_Label: MG_
Attribute_Definition: Atomic ratio 100Mg/(Mg+Fe2+) with Fe2+ set to 0.85x Fetotal
Attribute:
Attribute_Label: BA
Attribute_Definition: Barium concentration in parts per million
Attribute:
Attribute_Label: RB
Attribute_Definition: Rubidium concentration in parts per million
Attribute:
Attribute_Label: SR
Attribute_Definition: Strontium concentration in parts per million
Attribute:
Attribute_Label: Y
Attribute_Definition: Yttrium concentration in parts per million
Attribute:
Attribute_Label: ZR
Attribute_Definition: Zirconium concentration in parts per million
Attribute:
Attribute_Label: NB
Attribute_Definition: Niobium concentration in parts per million
Attribute:
Attribute_Label: NI
Attribute_Definition: Nickel concentration in parts per million
Attribute:
Attribute_Label: CU
Attribute_Definition: Copper concentration in parts per million
Attribute:
Attribute_Label: ZN
Attribute_Definition: Zinc concentration in parts per million
Attribute:
Attribute_Label: CR
Attribute_Definition: Chromium concentration in parts per million
Detailed_Description:
Entity_Type:
Entity_Type_Label: Anno_3_13
Detailed_Description:
Entity_Type:
Entity_Type_Label: rdg_chm_ptAnno
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: SHAPE
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: FeatureID
Attribute:
Attribute_Label: ZOrder
Attribute:
Attribute_Label: AnnotationClassID
Attribute:
Attribute_Label: Element
Attribute:
Attribute_Label: SHAPE_Length
Attribute_Definition: Length of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: SHAPE_Area
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Detailed_Description:
Entity_Type:
Entity_Type_Label: Anno_3_13
Detailed_Description:
Entity_Type:
Entity_Type_Label: rdg_pmg_pt
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: AREA
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Area is always zero for point coverages. Values are automatically generated.
Attribute:
Attribute_Label: PERIMETER
Attribute_Definition: Perimeter of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Perimeter is always zero for point coverages. Values are automatically generated.
Attribute:
Attribute_Label: RDG_PMG_
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: RDG_PMG_ID
Attribute_Definition: User-defined feature number.
Attribute_Definition_Source: ESRI
Attribute:
Attribute_Label: PTTYPE
Attribute_Definition: Type of chemical analysis
Attribute_Definition_Source: Author
Attribute:
Attribute_Label: SAMPNO
Attribute_Definition: Sample number used in field collection
Attribute_Definition_Source: Author
Attribute:
Attribute_Label: MAP_NO
Attribute_Definition: Number designation on map
Attribute:
Attribute_Label: LATITUDE
Attribute_Definition: Measurement of latitude
Attribute:
Attribute_Label: LONGITUDE
Attribute_Definition: Measurement of longitude
Attribute:
Attribute_Label: MAP_UNIT
Attribute_Definition: Geologic unit sample is located within
Attribute:
Attribute_Label: ROCK_TYPE
Attribute_Definition: Physical type of rock from which sample was taken
Attribute:
Attribute_Label: SIO2
Attribute_Definition: Silicon concentration expressed as weight percent oxide
Attribute:
Attribute_Label: TIO2
Attribute_Definition: Titanium concentration expressed as weight percent oxide
Attribute:
Attribute_Label: AL2O3
Attribute_Definition: Aluminum concentration expressed as weight percent oxide
Attribute:
Attribute_Label: FEO
Attribute_Definition: Ferrous iron concentration expressed as weight percent oxide
Attribute:
Attribute_Label: MNO
Attribute_Definition: Manganese concentration expressed as weight percent oxide
Attribute:
Attribute_Label: MGO
Attribute_Definition: Magnesium concentration expressed as weight percent oxide
Attribute:
Attribute_Label: CAO
Attribute_Definition: Calcium concentration expressed as weight percent oxide
Attribute:
Attribute_Label: NA2O
Attribute_Definition: Sodium concentration expressed as weight percent oxide
Attribute:
Attribute_Label: K2O
Attribute_Definition: Potassium concentration expressed as weight percent oxide
Attribute:
Attribute_Label: P2O5
Attribute_Definition: Phosphorous concentration expressed as weight percent oxide
Attribute:
Attribute_Label: TOTAL
Attribute_Definition: Total of weight percent oxides
Attribute:
Attribute_Label: SIO2_N
Attribute_Definition:
Silicon expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: TIO2_N
Attribute_Definition:
Titanium expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: AL2O3_N
Attribute_Definition:
Aluminum expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: FEO_N
Attribute_Definition:
Ferrous Iron expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: MNO_N
Attribute_Definition:
Manganese expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: MGO_N
Attribute_Definition:
Magnesium expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: CAO_N
Attribute_Definition:
Calcium expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: NA2O_N
Attribute_Definition:
Sodium expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: K2O_N
Attribute_Definition:
Potassium expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: P2O5_N
Attribute_Definition:
Phosphorous expressed as weight percent oxide from analysis recalculated volatile-free
Attribute:
Attribute_Label: TEXTURE
Attribute_Definition: Rock and groundmass texture
Attribute:
Attribute_Label: MG_
Attribute_Definition: Atomic ratio 100Mg/(Mg+Fe2+) with Fe2+ set to 0.85x Fetotal
Attribute:
Attribute_Label: BA
Attribute_Definition: Barium concentration in parts per million
Attribute:
Attribute_Label: RB
Attribute_Definition: Rubidium concentration in parts per million
Attribute:
Attribute_Label: SR
Attribute_Definition: Strontium concentration in parts per million
Attribute:
Attribute_Label: Y
Attribute_Definition: Yttrium concentration in parts per million
Attribute:
Attribute_Label: ZR
Attribute_Definition: Zirconium concentration in parts per million
Attribute:
Attribute_Label: NB
Attribute_Definition: Niobium concentration in parts per million
Attribute:
Attribute_Label: NI
Attribute_Definition: Nickel concentration in parts per million
Attribute:
Attribute_Label: CU
Attribute_Definition: Copper concentration in parts per million
Attribute:
Attribute_Label: ZN
Attribute_Definition: Zinc concentration in parts per million
Attribute:
Attribute_Label: CR
Attribute_Definition: Chromium concentration in parts per million
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USGS Information Services
Contact_Address:
Address_Type: mailing address
Address: Box 25286, Denver Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225-0046
Country: USA
Contact_Voice_Telephone: (303) 202-4200
Contact_Voice_Telephone: 1-888-ASK-USGS
Contact_Facsimile_Telephone: (303) 202-4695
Contact_Electronic_Mail_Address: infoservices@usgs.gov
Resource_Description:
Downloadable Data USGS Scientific Investigations Map SIM-2844
Distribution_Liability:
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 publication has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
Standard_Order_Process:
Non-digital_Form:
Paper copies of the map sheets and pamphlet can be obtained by contacting USGS Information Services via the contact information listed above.
Fees:
Plotting fees are set by USGS Information Services, and may be obtained by contacting them via the contact information given above.
Metadata_Reference_Information:
Metadata_Date: 20041021
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Karen Wheeler
Contact_Address:
Address_Type: mailing address
Address: 345 Middlefield Rd
Address: MS 973
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025
Country: USA
Contact_Voice_Telephone: 650-329-4935
Contact_Facsimile_Telephone: 650-329-4936
Contact_Electronic_Mail_Address: kwheeler@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.8.6 on Wed Nov 03 10:15:28 2004