Identification_Information:
  Citation:
    Citation_Information:
      Originator: John H. Stewart, John E. Carlson, Gary L. Raines, Katherine A. Connors, Lorre A. Moyer, Robert J. Miller
      Publication_Date: 2003
      Title: Spatial digital database for the geologic map of Nevada
      Edition: version 3.0
      Geospatial_Data_Presentation_Form: vector digital data
      Series_Information:
        Series_Name: Open-File Report
        Issue_Identification: 03-66
      Publication_Information:
        Publication_Place: Menlo Park, California
        Publisher: U.S. Geological Survey
      Online_Linkage: http://geopubs.wr.usgs.gov/open-file/of03-66/
  Description:
    Abstract: This report publishes a geologic digital spatial database (nvgeo) representing the geologic map of Nevada (Stewart and Carlson, 1978a).  The original paper map was printed as a single sheet at a scale of 1:500,000, then reprinted as two sheets in 1991.  The database provided by this open-file report supercedes earlier published digital versions (Turner and Bawiec, 1991, Raines and others, 1996).
    Purpose: This digital spatial database is one of many being created by the U.S. Geological Survey as an ongoing effort to provide geologic information for use in spatial analysis in a geographic information system (GIS).  This database can be queried in many ways to produce a variety of geologic maps.  This database is not meant to be used or displayed at any scale larger than 1:500,000 (for example, 1:100,000).
    Supplemental_Information: The digital geologic map of Nevada consists of a single spatial database (nvgeo) which contains map units and lines.  The feature attribute tables include a geologic linework table, NVGEO.AAT, that relates to the NVGEO.CON (contacts and boundaries), NVGEO.ST2 (structures), and NVGEO.REF (source reference) files, and a rock unit table, NVGEO.PAT, that relates to the NVGEO.RU (rock unit) and NVGEO.REF (source reference) files.
  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 2003
    Currentness_Reference: publication date
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -120.132327
      East_Bounding_Coordinate: -113.793386
      North_Bounding_Coordinate: 42.032704
      South_Bounding_Coordinate: 34.989789
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: none
      Theme_Keyword: geology
      Theme_Keyword: geologic map
      Theme_Keyword: geospatial database
      Theme_Keyword: state map
    Place:
      Place_Keyword: Nevada
      Place_Keyword: State of Nevada
      Place_Keyword: USA
    Temporal:
      Temporal_Keyword: Quaternary
      Temporal_Keyword: Tertiary
      Temporal_Keyword: Cenozoic
      Temporal_Keyword: Mesozoic
      Temporal_Keyword: Paleozoic
      Temporal_Keyword: Proterozoic
  Access_Constraints: none
  Use_Constraints:
    This digital database is not intended to be used or displayed at any scale larger than 1:500,000.

    Any hardcopies utilizing these data sets shall clearly indicate their source.  If the user has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map.  User specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by the U.S. Geological Survey.

    This database has been approved for release and publication by the Director of the USGS. Although this database 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.
  Point_of_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Robert J. Miller
        Contact_Organization: U.S. Geological Survey
      Contact_Position: geologist
      Contact_Voice_Telephone: 650 329-5407
      Contact_Electronic_Mail_Address: rjmiller@usgs.gov
  Data_Set_Credit:
    A digital version of the Stewart and Carlson (1978a) geologic map of Nevada was first prepared by Turner and Bawiec (1991):  negatives for the two geologic map sheets were scanned, vectorized, and released in digital format.
    A second digital version of the Stewart and Carlson (1978a) map was included in Raines and others (1996). That dataset combined the previously separate north and south sheet datasets of Turner and Bawiec (1991) and provided line attributes and other corrections and improvements (to the topology and labels).  Concealed or inferred faults were converted from scanned representations (discontinuous dots and dashes) to properly attributed continuous lines. A table capturing much of the information in the unit descriptions was added.  And, a data model was populated with information from the correlation and description of map units from the original paper map.
    With this release of a third digital dataset (nvgeo), several enhancements were made by R.J. Miller. Faults, previously provided in a separate spatial database, have now been combined with the geologic contacts and map units spatial database. The resultant database was then adjusted to conform to a set of state boundaries derived from 1:100,000 scale Digital Line Graph (DLG) files.
  Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.3.0.800
Data_Quality_Information:
  Logical_Consistency_Report:
    Polygon and chain-node topology present.  Segments making up the
    outer and inner boundaries of a polygon tie end-to-end to
    completely enclose the area.  Line segments are a set of
    sequentially numbered coordinate pairs.  No duplicate features
    exist nor duplicate points in a data string.  Intersecting lines
    are separated into individual line segments at the point of
    intersection.  All nodes are represented by a single coordinate
    pair, which indicates the beginning or end of a line segment.
  Completeness_Report:
    All geologic units were compiled from Stewart and Carlson (1978) at a
    scale of 1:500,000.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: Registration and/or transformation errors for the original digitizing are not available.
      Quantitative_Horizontal_Positional_Accuracy_Assessment:
        Horizontal_Positional_Accuracy_Value: 200- 500 meters
        Horizontal_Positional_Accuracy_Explanation: Based on comparison of the topographically sensitive linework( ie Quaternary sediments in narrow valleys etc) with larger scale topographic basemaps.
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: John H. Stewart, John E. Carlson
          Publication_Date: 1978
          Title: Geologic map of Nevada
          Geospatial_Data_Presentation_Form: map
          Series_Information:
            Issue_Identification: Geologic Map of Nevada
          Publication_Information:
            Publication_Place: Reston, VA
            Publisher: U.S. Geological Survey and Nevada Bureau of Mines and Geology
      Source_Scale_Denominator: 500000
      Type_of_Source_Media: mylar
      Source_Citation_Abbreviation: Stewart and Carlson, 1978a
      Source_Contribution: sole source of spatial geologic map data
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: John H. Stewart, John E. Carlson
          Publication_Date: 1978
          Title: Sources of data for the geologic map of Nevada
          Geospatial_Data_Presentation_Form: document
          Series_Information:
            Series_Name: Miscellaneous Field Investigations
            Issue_Identification: MF-930
          Publication_Information:
            Publication_Place: Reston, VA
            Publisher: U.S Geological Survey
      Source_Citation_Abbreviation: Stewart and Carlson, 1978b
      Source_Contribution: source of map unit descriptions
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Turner, R.M., Bawiec, W.J.
          Publication_Date: 1991
          Title: Geology of Nevada - a digital representation of the 1978 geologic map of Nevada
          Edition: version 1.0
          Geospatial_Data_Presentation_Form: digital vector data
          Series_Information:
            Series_Name: Digital Data Series
            Issue_Identification: DDS-2
          Publication_Information:
            Publisher: U.S. Geological Survey
      Source_Scale_Denominator: 500000
      Type_of_Source_Media: mylar
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 1978
        Source_Currentness_Reference: publication date of Geologic Map of Nevada by Stewart and Carlson (1978a)
      Source_Citation_Abbreviation: Turner and Bawiec, 1991
      Source_Contribution: initial source of digital vector data that was then processed by Raines and others (1996).
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Gary L. Raines, Don L. Sawatzky, Katherine A. Connors
          Publication_Date: 1996
          Title: Great Basin geoscience data base
          Edition: version 2.0 (although not specified as such on that publication)
          Geospatial_Data_Presentation_Form: vector digital data
          Series_Information:
            Series_Name: Digital Data Series
            Issue_Identification: DDS-41
          Publication_Information:
            Publication_Place: Washington, D.C.
            Publisher: U.S. Geological Survey
      Source_Scale_Denominator: 500000
      Type_of_Source_Media: digital vector data
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 1978
        Source_Currentness_Reference: publication date of Geologic Map of Nevada by Stewart and Carlson (1978a)
      Source_Citation_Abbreviation: Raines and others, 1996
      Source_Contribution:
        Revised Turner and Bawiec's (1991) spatial databases as follows:
        1. Joined north and south halves, edited labels, and deleted multiple labels.  Added nonprinting lines, nvlntype = 0, for ARC/INFO and plotter limitations.
        2. Selected arcs with same formation on both sides.  These should be most of the faults.  Set nvlntype = 6.
        3. Examined all thrust faults, and formation labels on paper map. Selected and flipped all incorrect faults, and selected polys with empty labels adding correct formation labels. Comments: Edited and corrected over 6,000 fault and formation errors.
    Process_Step:
      Process_Description: Map was digitized from mylar publication materials and minimally attributed
      Source_Used_Citation_Abbreviation: Stewart and Carlson, 1978a
      Process_Date: 1980s
      Source_Produced_Citation_Abbreviation: Turner and Bawiec, 1991 (version 1.0)
    Process_Step:
      Process_Description: Joined north and south halves, edited labels, and deleted multiple labels.  Added nonprinting lines, nvlntype = 0, for ARC/INFO and plotter limitations.
      Source_Used_Citation_Abbreviation: Turner and Bawiec, 1991
      Process_Date: 1992
      Source_Produced_Citation_Abbreviation: Connors, 1992, unpublished
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Katherine A. Connors
            Contact_Organization: U.S. Geological Survey
    Process_Step:
      Process_Description:
        Selected arcs with same formation on both sides.
        These should be most of the faults.  Set nvlntype = 6.
      Source_Used_Citation_Abbreviation: Connors, 1992, unpublished
      Process_Date: 1993
      Source_Produced_Citation_Abbreviation: Raines, 1993, unpublished
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Gary L. Raines
          Contact_Electronic_Mail_Address: graines@usgs.gov
    Process_Step:
      Process_Description: Examined all thrust faults, and formation labels on paper map. Selected and flipped all incorrect faults, and selected polys with empty labels adding correct formation labels. Comments: Edited and corrected over 6,000 fault and formation errors.
      Source_Used_Citation_Abbreviation: Raines, 1993, unpublished
      Process_Date: 1996
      Source_Produced_Citation_Abbreviation: Raines, G.L., Sawatzky, D.L., and Connors, K.A., 1996 (version 2.0)
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Lorre A. Moyer
            Contact_Organization: U.S. Geological Survey
          Contact_Electronic_Mail_Address: lorre@usgs.gov
    Process_Step:
      Process_Description: Rubbersheeted the perimeter of the state coverage to match a reference dataset of state boundaries derived from 1:100,000 scale digital line graphs (DLG). Replaced the section of the state boundary following the Colorado River with  a line from 100k DLG hydrographic files. Updated this metadata to FGDC compliance.
      Source_Used_Citation_Abbreviation: Raines, G.L., Sawatzky, D.L., and Connors, K.A., 1996
      Process_Date: 2000
      Source_Produced_Citation_Abbreviation: Miller, 2000, unpublished
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Robert J. Miller
            Contact_Organization: U.S. Geological Survey
          Contact_Electronic_Mail_Address: rjmiller@usgs.gov
    Process_Step:
      Process_Description: Created a table of lithologic information following format of Digital Geologic Map Data Model, version 4.3 (Johnson and others, 1998).  Populated the table from the description of map units of Stewart and Carlson (1978b) and various other sources.
      Source_Used_Citation_Abbreviation: Stewart and Carlson, 1978b
      Process_Date: 2000
      Source_Produced_Citation_Abbreviation: Ludington, 2000 (unpublished)
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Steve Ludington
            Contact_Organization: U. S. Geological Survey
          Contact_Position: geologist
          Contact_Electronic_Mail_Address: slud@usgs.gov
    Process_Step:
      Process_Description: Attached lithologic information (Ludington, 2000, unpublished) to spatial database (Miller, 2000, unpublished).
      Source_Used_Citation_Abbreviation: Miller (2000, unpublished) and Ludington (2000, unpublished)
      Process_Date: 2002
      Source_Produced_Citation_Abbreviation: Stewart and others, 2003 (version 3.0)
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Robert J. Miller
            Contact_Organization: U.S. Geological Survey
          Contact_Electronic_Mail_Address: rjmiller@usgs.gov
    Process_Step:
      Process_Description: Metadata imported.
      Source_Used_Citation_Abbreviation: C:\DOCUME~1\PDERKE~1.SFO\LOCALS~1\Temp\xml14C.tmp
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Vector
  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Complete chain
      Point_and_Vector_Object_Count: 73285
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Label point
      Point_and_Vector_Object_Count: 21029
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
      Point_and_Vector_Object_Count: 21029
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Point
      Point_and_Vector_Object_Count: 45
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: String
      Point_and_Vector_Object_Count: 0
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Map_Projection:
        Map_Projection_Name: Lambert Conformal Conic
        Lambert_Conformal_Conic:
          Standard_Parallel: 33.000000
          Standard_Parallel: 45.000000
          Longitude_of_Central_Meridian: -117.000000
          Latitude_of_Projection_Origin: 0.000000
          False_Easting: 0.000000
          False_Northing: 0.000000
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: coordinate pair
        Coordinate_Representation:
          Abscissa_Resolution: 0.005531
          Ordinate_Resolution: 0.005531
        Planar_Distance_Units: meters
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1927
      Ellipsoid_Name: Clarke 1866
      Semi-major_Axis: 6378206.400000
      Denominator_of_Flattening_Ratio: 294.978698
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: nvgeo.aat
      Entity_Type_Definition: Arc attribute table: linear features (contacts, faults, and folds)
    Attribute:
      Attribute_Label: FID
      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: FNODE#
      Attribute_Definition: Internal node number for the beginning of an arc (from-node).
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Whole numbers that are automatically generated.
    Attribute:
      Attribute_Label: TNODE#
      Attribute_Definition: Internal node number for the end of an arc (to-node).
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Whole numbers that are automatically generated.
    Attribute:
      Attribute_Label: LPOLY#
      Attribute_Definition: Internal node number for the left polygon.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Whole numbers that are automatically generated.
    Attribute:
      Attribute_Label: RPOLY#
      Attribute_Definition: Internal node number for the right polygon.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Whole numbers that are automatically generated.
    Attribute:
      Attribute_Label: 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: NVGEO#
      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: NVGEO-ID
      Attribute_Definition: User-defined feature number.
      Attribute_Definition_Source: ESRI
    Attribute:
      Attribute_Label: LINECODE
      Attribute_Definition: Numeric code used to identify type of linear feature.  Linecodes < 100 are used for contacts and boundaries which are described in the NVGEO.CON file.  Linecodes > 100 and < 600 represent structural features which are described in the NVGEO.ST2 file.
    Attribute:
      Attribute_Label: FAULT_CONT
      Attribute_Definition: Indicates if fault constitutes a contact between rock units.
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: yes
          Enumerated_Domain_Value_Definition: fault IS a contact between rock units
        Enumerated_Domain:
          Enumerated_Domain_Value: no
          Enumerated_Domain_Value_Definition: fault is NOT a contact between rock units
    Attribute:
      Attribute_Label: DWNTHRWN
      Attribute_Definition: Indicates the sense of movement on the fault.  The side indicated by the compass direction is downdropped.
    Attribute:
      Attribute_Label: SOURCE_ID
      Attribute_Definition: Numeric code used to identify the data source for the linear feature.  Complete references for the sources are listed in the NVGEO.REF file.
    Attribute:
      Attribute_Label: SPATIAL_OBJ_ID
      Attribute_Definition: Unique numeric identifier for each object in the nvgeo feature attribute tables (nvgeo.aat and nvgeo.pat).  (This integer is NOT duplicated in the nvgeo.pat feature attribute table.)
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: nvgeo.pat
      Entity_Type_Definition: Polygon attribute table: map units
    Attribute:
      Attribute_Label: FID
      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: Positive real numbers that are automatically generated.
    Attribute:
      Attribute_Label: PERIMETER
      Attribute_Definition: Perimeter of feature in internal units.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Positive real numbers that are automatically generated.
    Attribute:
      Attribute_Label: NVGEO#
      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: NVGEO-ID
      Attribute_Definition: User-defined feature number.
      Attribute_Definition_Source: ESRI
    Attribute:
      Attribute_Label: MAP_UNIT
      Attribute_Definition:
        Map unit designation as it appeared on the printed Stewart and Carlson (1978a) map; however,
        special geologic age symbols have been replaced by ascii characters:
        TR for Triassic, P for Pennsylvanian, and C for Cambrian.
        Map unit description from Stewart and Carlson (1978a) is also included in this metadata in the "Enumerated_Domain_Value_Definition."
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Qa
          Enumerated_Domain_Value_Definition: ALLUVIAL DEPOSITS - Locally includes beach and sand dune deposits
        Enumerated_Domain:
          Enumerated_Domain_Value: Qp
          Enumerated_Domain_Value_Definition: PLAYA, MARSH, AND ALLUVIAL-FLAT DEPOSITS, LOCALLY ERODED
        Enumerated_Domain:
          Enumerated_Domain_Value: Qls
          Enumerated_Domain_Value_Definition: LANDSLIDE DEPOSITS
        Enumerated_Domain:
          Enumerated_Domain_Value: Qm
          Enumerated_Domain_Value_Definition: MORAINAL DEPOSITS
        Enumerated_Domain:
          Enumerated_Domain_Value: QToa
          Enumerated_Domain_Value_Definition: OLDER ALLUVIAL DEPOSITS
        Enumerated_Domain:
          Enumerated_Domain_Value: QTr
          Enumerated_Domain_Value_Definition: RHYOLITIC FLOWS AND SHALLOW INTRUSIVE ROCKS
        Enumerated_Domain:
          Enumerated_Domain_Value: QTa
          Enumerated_Domain_Value_Definition: ANDESITE FLOWS AND BRECCIAS
        Enumerated_Domain:
          Enumerated_Domain_Value: QTb
          Enumerated_Domain_Value_Definition: BASALT FLOWS - Locally includes maar deposits
        Enumerated_Domain:
          Enumerated_Domain_Value: QTs
          Enumerated_Domain_Value_Definition: SEDIMENTARY ROCKS - Mostly lake deposits
        Enumerated_Domain:
          Enumerated_Domain_Value: Ks
          Enumerated_Domain_Value_Definition: CONTINENTAL DEPOSITS OF SILTSTONE, SHALE, CONGLOMERATE, AND LIMESTONE - Includes units such as King Lear Formation in Humboldt County, Newark Canyon Formation in Eureka County, Willow Tank Formation and Baseline Sandstone in Clark County
        Enumerated_Domain:
          Enumerated_Domain_Value: TKs
          Enumerated_Domain_Value_Definition: CONTINENTAL SEDIMENTARY ROCKS - Includes units such as Pansy Lee Conglomerate in Humboldt County, part of Cretaceous(?) and Tertiary rocks of Kleinhampl and Ziony (1967) in northern Nye County, and part of older clastic rocks of Tschanz and Pampeyan (1970) in Lincoln County
        Enumerated_Domain:
          Enumerated_Domain_Value: Ts1
          Enumerated_Domain_Value_Definition: SEDIMENTARY ROCKS - Includes Sheep Pass Formation (Eocene) and related units and unnamed tuffaceous sedimentary rocks
        Enumerated_Domain:
          Enumerated_Domain_Value: Ta1
          Enumerated_Domain_Value_Definition: ANDESITE AND RELATED ROCKS OF INTERMEDIATE COMPOSITION - Flows and breccias
        Enumerated_Domain:
          Enumerated_Domain_Value: Tr1
          Enumerated_Domain_Value_Definition: RHYOLITIC FLOWS AND SHALLOW INTRUSIVE ROCKS
        Enumerated_Domain:
          Enumerated_Domain_Value: Tt1
          Enumerated_Domain_Value_Definition: WELDED AND NONWELDED SILICIC ASH-FLOW TUFFS - Locally includes thin units of air-fall tuff and sedimentary rock
        Enumerated_Domain:
          Enumerated_Domain_Value: Ts2
          Enumerated_Domain_Value_Definition: TUFFACEOUS SEDIMENTARY ROCKS - Locally includes minor amounts of tuff
        Enumerated_Domain:
          Enumerated_Domain_Value: Tob
          Enumerated_Domain_Value_Definition: OLDER BASALT ROCKS
        Enumerated_Domain:
          Enumerated_Domain_Value: Ta2
          Enumerated_Domain_Value_Definition: ANDESITE AND RELATED ROCKS OF INTERMEDIATE COMPOSITION - Flows and breccias
        Enumerated_Domain:
          Enumerated_Domain_Value: Tr2
          Enumerated_Domain_Value_Definition: RHYOLITIC FLOWS AND SHALLOW INTRUSIVE ROCKS
        Enumerated_Domain:
          Enumerated_Domain_Value: Tt2
          Enumerated_Domain_Value_Definition: WELDED AND NONWELDED SILICIC ASH-FLOW TUFFS - Locally includes thin units of air-fall tuff and sedimentary rock
        Enumerated_Domain:
          Enumerated_Domain_Value: TKsu
          Enumerated_Domain_Value_Definition: CONTINENTAL SEDIMENTARY ROCKS - Clark County
        Enumerated_Domain:
          Enumerated_Domain_Value: Ths
          Enumerated_Domain_Value_Definition: HORSE SPRING FORMATION - Tuffaceous sedimentary rocks, southern Nevada
        Enumerated_Domain:
          Enumerated_Domain_Value: Ts3
          Enumerated_Domain_Value_Definition: TUFFACEOUS SEDIMENTARY ROCKS - Locally includes minor amounts of tuff
        Enumerated_Domain:
          Enumerated_Domain_Value: Tts
          Enumerated_Domain_Value_Definition: ASH-FLOW TUFFS AND TUFFACEOUS SEDIMENTARY ROCKS
        Enumerated_Domain:
          Enumerated_Domain_Value: Tbg
          Enumerated_Domain_Value_Definition: BANBURY FORMATION - Basalt, gravel, and tuffaceous sediments locally. Northeast Humboldt County and northwest Elko County
        Enumerated_Domain:
          Enumerated_Domain_Value: Tb
          Enumerated_Domain_Value_Definition: BASALT FLOWS
        Enumerated_Domain:
          Enumerated_Domain_Value: Tba
          Enumerated_Domain_Value_Definition: ANDESITE AND BASALT FLOWS - Mostly in about 17 to about 6 m.y. age range. In Humboldt County, locally includes rocks as old as 21 m.y. May include rocks younger than 6 m.y. in places
        Enumerated_Domain:
          Enumerated_Domain_Value: Ta3
          Enumerated_Domain_Value_Definition: ANDESITE AND RELATED ROCKS OF INTERMEDIATE COMPOSITION - Flows and breccias
        Enumerated_Domain:
          Enumerated_Domain_Value: Tr3
          Enumerated_Domain_Value_Definition: RHYOLITIC FLOWS AND SHALLOW INTRUSIVE ROCKS
        Enumerated_Domain:
          Enumerated_Domain_Value: Trt
          Enumerated_Domain_Value_Definition: ASH-FLOW TUFFS, RHYOLITIC FLOWS, AND SHALLOW INTRUSIVE ROCKS
        Enumerated_Domain:
          Enumerated_Domain_Value: Tt3
          Enumerated_Domain_Value_Definition: WELDED AND NONWELDED SILICIC ASH-FLOW TUFFS - Locally includes thin units of air-fall tuff and sedimentary rock
        Enumerated_Domain:
          Enumerated_Domain_Value: Tbr
          Enumerated_Domain_Value_Definition: BRECCIA - Volcanic, thrust, and jasperoid breccia and landslide megabreccia
        Enumerated_Domain:
          Enumerated_Domain_Value: Ti
          Enumerated_Domain_Value_Definition: INTRUSIVE ROCKS - Aphanitic, porphyritic, and coarsely granular rocks ranging in composition from diorite to granite. Clark County
        Enumerated_Domain:
          Enumerated_Domain_Value: Tmi
          Enumerated_Domain_Value_Definition: INTRUSIVE ROCKS OF MAFIC TO INTERMEDIATE COMPOSITION
        Enumerated_Domain:
          Enumerated_Domain_Value: Tri
          Enumerated_Domain_Value_Definition: RHYOLITIC INTRUSIVE ROCKS
        Enumerated_Domain:
          Enumerated_Domain_Value: TJgr
          Enumerated_Domain_Value_Definition: GRANITIC ROCKS, CENTRAL AND EASTERN NEVADA - Mostly quartz monzonite and granodiorite. Inconclusively dated or not dated radiometrically
        Enumerated_Domain:
          Enumerated_Domain_Value: Tgr
          Enumerated_Domain_Value_Definition: GRANITIC ROCKS - Mostly quartz monzonite and granodiorite
        Enumerated_Domain:
          Enumerated_Domain_Value: MZgr
          Enumerated_Domain_Value_Definition: GRANITIC ROCKS, WESTERN NEVADA (Mesozoic) - Mostly quartz monzonite and granodiorite. Inconclusively dated or not dated radiometrically
        Enumerated_Domain:
          Enumerated_Domain_Value: KJd
          Enumerated_Domain_Value_Definition: DIORITE
        Enumerated_Domain:
          Enumerated_Domain_Value: Kgr
          Enumerated_Domain_Value_Definition: GRANITIC ROCKS - Mostly quartz monzonite and granodiorite
        Enumerated_Domain:
          Enumerated_Domain_Value: Jgr
          Enumerated_Domain_Value_Definition: GRANITIC ROCKS - Mostly quartz monzonite and granodiorite
        Enumerated_Domain:
          Enumerated_Domain_Value: TRgr
          Enumerated_Domain_Value_Definition: GRANITIC ROCKS - Quartz monzonite in northern Esmeralda County
        Enumerated_Domain:
          Enumerated_Domain_Value: KJim
          Enumerated_Domain_Value_Definition: IGNEOUS AND METAMORPHIC COMPLEX - Pegmatitic granite and other granitic rocks complexly intermixed with metasedimentary rocks. Considered to be Mesozoic igneous complex intruding lower Paleozoic and possibly Precambrian Z sedimentary rocks.  Grades into units shown on map as lower Paleozoic.  Ruby Mountains and East Humboldt Range, Elko County
        Enumerated_Domain:
          Enumerated_Domain_Value: JTRsv
          Enumerated_Domain_Value_Definition: SHALE, SANDSTONE, VOLCANOGENIC CLASTIC ROCKS, ANDESITE, RHYOLITE, AND LOCALLY THICK CARBONATE UNITS - Undivided sequence locally containing recognizable equivalents of the Luning and Dunlap Formations
        Enumerated_Domain:
          Enumerated_Domain_Value: Jd
          Enumerated_Domain_Value_Definition: DUNLAP FORMATION (Lower and Middle Jurassic) - Conglomerate, sandstone, greenstone, felsite, and tuff. Locally contemporaneous with folding and thrusting. Mineral County and adjacent parts of Esmeralda and Nye Counties
        Enumerated_Domain:
          Enumerated_Domain_Value: Jgb
          Enumerated_Domain_Value_Definition: GABBROIC COMPLEX (Lower and Middle Jurassic) - Includes gabbro, basalt, and synorogenic quartz sandstone (Boyer Ranch Formation). Churchill and Pershing Counties
        Enumerated_Domain:
          Enumerated_Domain_Value: Jv
          Enumerated_Domain_Value_Definition: VOLCANIC SANDSTONE, FELSIC ASH-FLOW TUFFS, RHYOLITE, AND RHYODACITE FLOWS (Upper? Jurassic) - Pony Trail Group of Cortez Mountains, Eureka County
        Enumerated_Domain:
          Enumerated_Domain_Value: JTRs
          Enumerated_Domain_Value_Definition: SHALE, MUDSTONE, SILTSTONE, SANDSTONE, AND CARBONATE ROCK; SPARSE VOLCANIC ROCK (Upper Triassic and Lower Jurassic) - Includes Auld Lang Syne Group, Nightingale sequence of Bonham (1969), and Gabbs and Sunrise Formations
        Enumerated_Domain:
          Enumerated_Domain_Value: TRc
          Enumerated_Domain_Value_Definition: LIMESTONE, MINOR AMOUNTS OF DOLOMITE, SHALE, AND SANDSTONE; LOCALLY THICK CONGLOMERATE UNITS (Lower, Middle, and Upper Triassic) - Includes Tobin, Dixie Valley, Favret, Augusta Mountain, and Cane Spring Formations and Star Peak Group in central Nevada and Grantsville and Luning Formations in west-central Nevada
        Enumerated_Domain:
          Enumerated_Domain_Value: TRk
          Enumerated_Domain_Value_Definition: KOIPATO GROUP AND RELATED ROCKS (Lower Triassic) - Altered andesitic flows, rhyolitic tuffs and flows, and clastic rocks. Includes rocks mapped by Silberling (1959) as Pablo Formation and originally considered to be Permian in the Shoshone Mountains, Nye County.  Includes Tallman Fanglomerate (Permian?) in Humboldt County
        Enumerated_Domain:
          Enumerated_Domain_Value: TRlgr
          Enumerated_Domain_Value_Definition: LEUCOGRANITE AND RHYOLITE PORPHYRY
        Enumerated_Domain:
          Enumerated_Domain_Value: JTRa
          Enumerated_Domain_Value_Definition: AZTEC SANDSTONE (Triassic? and Jurassic) - Friable fine- to medium-grained sandstone with conspicuous large-scale cross strata; considered eolian. Age based on correlation with Navajo Sandstone
        Enumerated_Domain:
          Enumerated_Domain_Value: TRch
          Enumerated_Domain_Value_Definition: CHINLE FORMATION AND ASSOCIATED ROCKS (Upper Triassic) - Continental deposits of variegated bentonitic claystone, siltstone, and clayey sandstone; ledge-forming sandstone; and red siltstone
        Enumerated_Domain:
          Enumerated_Domain_Value: TRmt
          Enumerated_Domain_Value_Definition: MOENKOPI FORMATION, THAYNES FORMATION, AND RELATED ROCKS (Lower Triassic) - Marine deposits of siltstone, limestone, and sparse conglomerate
        Enumerated_Domain:
          Enumerated_Domain_Value: JPu
          Enumerated_Domain_Value_Definition: VOLCANOGENIC SEDIMENTARY ROCKS, TUFF, ANDESITIC AND FELSITIC FLOWS, AND CARBONATE ROCKS - Age uncertain. Mineral, Esmeralda, and northwest Nye Counties
        Enumerated_Domain:
          Enumerated_Domain_Value: TRPs
          Enumerated_Domain_Value_Definition: SILTY LIMESTONE, MINOR AMOUNTS OF SHALE, AND SOME GREENSTONE - Unnamed sequence in Adobe Range, northern Elko County
        Enumerated_Domain:
          Enumerated_Domain_Value: TRPvs
          Enumerated_Domain_Value_Definition: VOLCANIC FLOWS AND FLOW BRECCIAS, CHIEFLY OF ANDESITIC COMPOSITION, TUFFS, SPARSE SANDSTONE AND GRAYWACKE - Includes Happy Creek Volcanic Series and related rocks in Humboldt County and similar rocks in Washoe and Pershing Counties; includes andesite breccias and volcanogenic sedimentary rocks in Mineral County
        Enumerated_Domain:
          Enumerated_Domain_Value: PMh
          Enumerated_Domain_Value_Definition: HAVALLAH SEQUENCE OF SILBERLING AND ROBERTS (1962) - Chert argillite, shale, greenstone, and minor amounts of siltstone, sandstone, conglomerate, and limestone. Includes Schoonover Formation of Fagan (1962) and Reservation Hill Formation in Elko County, Farrel Canyon Formation in southwestern Humboldt County, Havallah and Pumpernickel Formations in Pershing, Lander, and parts of Humboldt Counties, and rocks originally considered a part of the Pablo and Excelsior Formations in northen Nye, northern Esmeralda, and southern Mineral Counties.  Assignment of some rocks to the Havallah sequence in the East Range, Pershing County, is highly uncertain.  Includes rocks ranging in age from Late Mississippian to Early Permian
        Enumerated_Domain:
          Enumerated_Domain_Value: Msv
          Enumerated_Domain_Value_Definition: SILICEOUS AND VOLCANIC ROCKS - In Humboldt County, consists of altered pillow lavas, coarse volcanic breccias, clastic limestone, and minor amounts of sandstone, shale, siliceous shale, and chert of the Goughs Canyon Formation (Lower and Upper Mississippian).  In the East Range, Pershing County, consists of quartzite, conglomerate, slate, limestone, chert, and greenstone of the Inskip Formation (Mississippian?)
        Enumerated_Domain:
          Enumerated_Domain_Value: Ml
          Enumerated_Domain_Value_Definition: MASSIVE LIMESTONE - In the San Antonio Mountains, western Nye County
        Enumerated_Domain:
          Enumerated_Domain_Value: TRPd
          Enumerated_Domain_Value_Definition: CONGLOMERATE, SANDSTONE, SHALE, AND DOLOMITE OF DIABLO FORMATION BELOW AND SHALE, SANDSTONE, AND CONGLOMERATE OF CANDELARIA FORMATION ABOVE (Lower or Upper Permian to Lower Triassic) - Mineral, Esmeralda, and northwestern Nye Counties
        Enumerated_Domain:
          Enumerated_Domain_Value: PPa
          Enumerated_Domain_Value_Definition: ANTLER SEQUENCE OF SILBERLING AND ROBERTS (1962) (Middle Pennsylvanian to Early or Late Permian) (Guadalupian) - Conglomerate, sandy to conglomeratic limestone, limestone, sandstone, and calcareous shale.  Thin detrital and carbonate sequence within main part of Antler orogenic belt.  Includes units such as Sunflower Formation of Bushnell (1967) in Elko County, Battle Formation, Antler Peak Limestone, and Edna Mountain Formation in Lander and western Eureka counties, and Wildcat Peak Formation in northern Nye County
        Enumerated_Domain:
          Enumerated_Domain_Value: MDmc
          Enumerated_Domain_Value_Definition: CONGLOMERATE, LIMESTONE, META-ANDESITE, PHYLLITE, AND SHALE - Includes Grossman, Banner, Nelson, and Mountain City Formation. Northern Elko County
        Enumerated_Domain:
          Enumerated_Domain_Value: PPcd
          Enumerated_Domain_Value_Definition: SANDY AND SILTY LIMESTONE, CONGLOMERATE, AND SILTSTONE (Upper Pennsylvanian to Upper Permian) - Includes units such as Strathearn Formation of Dott (1955) and Buckskin Mountain, Beacon Flat, and Carlin Canyon Formations of Fails (1960) in Elko County and Carbon Ridge and Garden Valley Formations in Eureka County
        Enumerated_Domain:
          Enumerated_Domain_Value: Pcd
          Enumerated_Domain_Value_Definition: LIMESTONE, CHERTY LIMESTONE, SANDY LIMESTONE, AND CHERT-PEBBLE CONGLOMERATE (Lower and Middle Pennsylvanian) - Includes units such as Moleen and Tomera Formations of Dott (1955)
        Enumerated_Domain:
          Enumerated_Domain_Value: MDs
          Enumerated_Domain_Value_Definition: SHALE, SILTSTONE, SANDSTONE, CHERT-PEBBLE CONGLOMERATE, AND LIMESTONE - Includes units such as Pilot Shale, Joana Limestone, Chainman Shale, and Diamond Peak Formation in northern and eastern Nevada and Narrow Canyon Limestone, Mercury Limestone, and Eleana Formation in southern Nevada
        Enumerated_Domain:
          Enumerated_Domain_Value: Pc
          Enumerated_Domain_Value_Definition: CHERTY LIMESTONE AND SPARSE DOLOMITE, SHALE, AND SANDSTONE (Lower and Upper Permian) - Includes units such as Park City Group and equivalent rocks in northern Nevada and Toroweap Formation and Kaibab Limestone in southern Nevada
        Enumerated_Domain:
          Enumerated_Domain_Value: PMc
          Enumerated_Domain_Value_Definition: LIMESTONE, DOLOMITE, AND SHALE (Upper Paleozoic) - Includes Van Duzer Limestone of Decker (1962)
        Enumerated_Domain:
          Enumerated_Domain_Value: Psc
          Enumerated_Domain_Value_Definition: SILTSTONE, SANDSTONE, LIMESTONE, AND DOLOMITE (COMMONLY SILTY OR SANDY), AND GYPSUM (Lower Permian) - Includes units such as Rib Hill Sandstone and Pequop Formation of Steele (1959) in Elko County, Rib Hill Sandstone and Arcturus Formation in White Pine County, Queantoweap Sandstone of NcNair (1951), Hermit Shale, and Coconino Sandstone in Clark and southern Lincoln Counties
        Enumerated_Domain:
          Enumerated_Domain_Value: PPc
          Enumerated_Domain_Value_Definition: LIMESTONE AND SPARSE DOLOMITE, SILTSTONE, AND SANDSTONE (Lower Pennsylvanian to Lower Permian) - Includes units such as undivided Riepe Spring Limestone of Steele (1960) and Ely Limestone or their equivalent in Elko, White Pine, and northern Lincoln Counties and most of the Bird Spring Formation and Callville Limestone in Clark and southern Lincoln Counties.  Includes some stratigraphically higher Permian rocks in Leppy Peak, easternmost Elko County
        Enumerated_Domain:
          Enumerated_Domain_Value: Pc
          Enumerated_Domain_Value_Definition: LIMESTONE - Includes Ely Limestone (mostly Lower and Middle Pennsylvanian)
        Enumerated_Domain:
          Enumerated_Domain_Value: Mc
          Enumerated_Domain_Value_Definition: LIMESTONE AND MINOR AMOUNTS OF DOLOMITE AND SHALE - Includes units such as Rogers Spring and Monte Cristo Limestones
        Enumerated_Domain:
          Enumerated_Domain_Value: PZsp
          Enumerated_Domain_Value_Definition: SERPENTINITE (Paleozoic) - Mineral, northwestern Nye, and eastern Humboldt counties
        Enumerated_Domain:
          Enumerated_Domain_Value: DCsv
          Enumerated_Domain_Value_Definition: CHERT, SHALE, ARGILLITE, SILTSTONE, QUARTZITE, AND GREENSTONE - Undivided siliceous assemblage. Mostly Ordovician
        Enumerated_Domain:
          Enumerated_Domain_Value: Dsl
          Enumerated_Domain_Value_Definition: SLAVEN CHERT - Chert and sparse limy sandstone, siltstone, and limestone. Lander County
        Enumerated_Domain:
          Enumerated_Domain_Value: Ds
          Enumerated_Domain_Value_Definition: SHALE, SILICEOUS SILTSTONE, CHERT, AND MINOR AMOUNTS OF LIMESTONE - Includes Cockalorum Wash Formation of northern Nye County and Woodruff Formation and unnamed rocks in Elko County
        Enumerated_Domain:
          Enumerated_Domain_Value: Se
          Enumerated_Domain_Value_Definition: ELDER SANDSTONE - Feldspathic sandstone, siltstone, shale, and chert. Lander County
        Enumerated_Domain:
          Enumerated_Domain_Value: Ss
          Enumerated_Domain_Value_Definition: SHALE AND CHERT - Includes Fourmile Canyon Formation in Eureka County and Noh Formation of Riva (1970) and unnamed rocks in Elko County
        Enumerated_Domain:
          Enumerated_Domain_Value: Osv
          Enumerated_Domain_Value_Definition: SILICEOUS AND VOLCANIC ROCKS - Chert, shale, quartzite, greenstone, and minor amounts of limestone. Includes units such as Valmy Formation of north-central Nevada and some rocks mapped as Palmetto Formation in northern part of Esmeralda County and adjacent parts of Mineral and Nye Counties.  Locally includes rocks of Silurian and Devonian age
        Enumerated_Domain:
          Enumerated_Domain_Value: Os
          Enumerated_Domain_Value_Definition: SHALE, CHERT, AND MINOR AMOUNTS OF QUARTZITE, GREENSTONE, AND LIMESTONE - Includes units such as Vinini Formation of north-central Nevada, Palmetto Formation in southern and central parts of Esmeralda County, and Comus Formation in Humboldt County.  Locally includes rocks of Silurian and Devonian age
        Enumerated_Domain:
          Enumerated_Domain_Value: Ch
          Enumerated_Domain_Value_Definition: HARMONY FORMATION (Upper Cambrian) - Feldspathic and arkosic sandstone and minor amounts of shale, limestone, and chert
        Enumerated_Domain:
          Enumerated_Domain_Value: Csc
          Enumerated_Domain_Value_Definition: SCOTT CANYON FORMATION (Lower or Middle Cambrian) - Chert, shale, greenstone, and sparse limestone and quartzite. Southeast Humboldt County and northwest Lander County
        Enumerated_Domain:
          Enumerated_Domain_Value: Dt
          Enumerated_Domain_Value_Definition: ARGILLACEOUS LIMESTONE, CHERT, AND SHALE - Elko and Eureka Counties
        Enumerated_Domain:
          Enumerated_Domain_Value: St
          Enumerated_Domain_Value_Definition: PLATY LIMESTONE AND LIMY SILTSTONE, CHERT AT BASE - Includes units such as Roberts Mountains Formation, and Storff Formation and Chellis Limestone of Decker (1962). Locally includes rocks of Early Devonian age at top
        Enumerated_Domain:
          Enumerated_Domain_Value: Ot
          Enumerated_Domain_Value_Definition: SHALE, CHERT, AND LIMESTONE - Includes Aura Formation of Decker (1962) in northwest Elko County and Perkins Canyon Formation of Kay and Crawford (1964) in northern Nye County
        Enumerated_Domain:
          Enumerated_Domain_Value: OCt
          Enumerated_Domain_Value_Definition: PHYLLITE, SHALE, AND LIMESTONE - Locally includes chert and quartzite. Includes Tennessee Mountain Formation of Bushnell (1967) in western Elko County, Broad Canyon sequence of Means (1962) in La
        Enumerated_Domain:
          Enumerated_Domain_Value: Ct
          Enumerated_Domain_Value_Definition: SHALE AND THIN-BEDDED OR LAMINATED LIMESTONE; ALSO THINLY INTERBEDDED LIMESTONE AND CHERT - Includes units such as Preble and Emigrant Formations
        Enumerated_Domain:
          Enumerated_Domain_Value: CZs
          Enumerated_Domain_Value_Definition: PHYLLITIC SILTSTONE, QUARTZITE, AND LESSER AMOUNTS OF LIMESTONE AND DOLOMITE - Includes Reed Dolomite; Deep Spring, Campito, Poleta, Harkless, and Saline Valley Formations; and Mule Spring Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: Zw
          Enumerated_Domain_Value_Definition: WYMAN FORMATION - Phyllite and phyllitic siltstone and minor amounts of limestone, dolomite, and sandstone
        Enumerated_Domain:
          Enumerated_Domain_Value: Dc
          Enumerated_Domain_Value_Definition: DOLOMITE, LIMESTONE, AND MINOR AMOUNTS OF SANDSTONE AND QUARTZITE - Includes units such as Sevy and Simonson Dolomites, Guilmette and Nevada Formations, and Devils Gate Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: DCc
          Enumerated_Domain_Value_Definition: DOLOMITE AND LIMESTONE (Lower Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: Sc
          Enumerated_Domain_Value_Definition: DOLOMITE - Includes units such as Laketown and Lone Mountain Dolomites. Locally includes rocks of Early Devonian age at top
        Enumerated_Domain:
          Enumerated_Domain_Value: SOc
          Enumerated_Domain_Value_Definition: DOLOMITE - Includes uppermost part of Ordovician System (Ely Springs Dolomite and equivalent rocks) and all of Silurian System
        Enumerated_Domain:
          Enumerated_Domain_Value: Oc
          Enumerated_Domain_Value_Definition: LIMESTONE, DOLOMITE, SHALE, AND QUARTZITE - Includes units such as Pogonip Group, Eureka Quartzite, and Ely Springs Dolomite. Where Ely Springs Dolomite or equivalent rocks are included in SOc unit, this unit includes only the Pogonip Group and Eureka Quartzite or their equivalents
        Enumerated_Domain:
          Enumerated_Domain_Value: OCc
          Enumerated_Domain_Value_Definition: DOLOMITE AND LIMESTONE - Undivided Cambrian and Ordovician rocks in part of Clark County; mostly Cambrian
        Enumerated_Domain:
          Enumerated_Domain_Value: Cc
          Enumerated_Domain_Value_Definition: LIMESTONE AND DOLOMITE, LOCALLY THICK SEQUENCES OF SHALE AND SILTSTONE - Includes units such as Pioche Shale, Eldorado Dolomite, Geddes Limestone, Secret Canyon Shale, Hamburg Dolomite, Dunderberg Shale, and Windfall Formation of northern Nevada and Carrara, Bonanza King, and Nopah Formations of southern Nevada
        Enumerated_Domain:
          Enumerated_Domain_Value: CZq
          Enumerated_Domain_Value_Definition: QUARTZITE AND MINOR AMOUNTS OF CONGLOMERATE, PHYLLITIC SILTSTONE, LIMESTONE, AND DOLOMITE - Includes Prospect Mountain Quartzite, Osgood Mountain Quartzite, and Gold Hill Formation in northern Nevada and Stirling Quartzite, Wood Canyon Formation, and Zabriskie Quartzite in southern Nevada
        Enumerated_Domain:
          Enumerated_Domain_Value: Css
          Enumerated_Domain_Value_Definition: SANDSTONE AND QUARTZITE - Includes Tapeats Sandstone and related rocks. Rests on Precambrian metamorphic rocks
        Enumerated_Domain:
          Enumerated_Domain_Value: Zqs
          Enumerated_Domain_Value_Definition: QUARTZITE, PHYLLITIC SILTSTONE, CONGLOMERATE, LIMESTONE, AND DOLOMITE - Includes McCoy Creek Group (excluding Stella Lake Quartzite) of Misch and Hazzard (1962) in east-central Nevada and Johnnie Formation in southern Nevada
        Enumerated_Domain:
          Enumerated_Domain_Value: Ygr
          Enumerated_Domain_Value_Definition: GRANITIC ROCKS - Porphyritic rapakivi granite; 1,450 +/- 25 m.y. (L.T. Silver, oral commun., 1973)
        Enumerated_Domain:
          Enumerated_Domain_Value: Xm
          Enumerated_Domain_Value_Definition: METAMORPHIC ROCKS - Gneiss and schist and lesser amounts of gneissic granite, pyroxenite, hornblendite, migmatite, pegmatite, and marble. Includes highly folded granite lenses 1,740 +/- 25 m.y. old (L.T. Silver, oral commun., 1973). In southern Nye County, may be Precambrian Z rocks metamorphosed during the Mesozoic
        Enumerated_Domain:
          Enumerated_Domain_Value: OW
          Enumerated_Domain_Value_Definition: open water
    Attribute:
      Attribute_Label: UNIT
      Attribute_Definition: Numeric code used to identify rock unit. (This item also occurs in NVGEO.RU.  Attribute definitions are given in the RU look-up table.)
    Attribute:
      Attribute_Label: SOURCE_ID
      Attribute_Definition: Numeric code used to identify the data source for the rock unit.  Complete references for the sources are listed in the NVGEO.REF file.
    Attribute:
      Attribute_Label: SPATIAL_OBJ_ID
      Attribute_Definition: Unique numeric identifier for each object in the nvgeo feature attribute tables (nvgeo.aat and nvgeo.pat).  (This integer is NOT duplicated in the nvgeo.aat feature attribute table.)
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
      Contact_Instructions: This report is only available in electronic format at http://geopubs.wr.usgs.gov/open-file/of03-66/
  Resource_Description: Downloadable data (nvgeo.e00) for USGS Open-File Report 03-66
  Distribution_Liability:
    The U.S. Geological Survey (USGS) provides these geographic data "as is".  The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic 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.  Although these data have been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.

    In no event shall the USGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by USGS.

    This digital map dataset of the Geologic map of Nevada, is not meant to be used or displayed at any scale larger than 1:500,000 (for example, 1:100,000 or 1:24,000).
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: ARCE - ArcInfo export format
        Transfer_Size: 18.707
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://geopubs.wr.usgs.gov/open-file/of03-66/
Metadata_Reference_Information:
  Metadata_Date: 20031231
  Metadata_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Robert J. Miller
        Contact_Organization: U.S. Geological Survey
      Contact_Position: geologist
      Contact_Address:
        Address_Type: mailing
        Address: 345 Middlefield Road, MS 901
        City: Menlo Park
        State_or_Province: CA
        Postal_Code: 94025
        Country: USA
      Contact_Voice_Telephone: 650 329-5407
      Contact_Electronic_Mail_Address: rjmiller@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_Access_Constraints: none
  Metadata_Use_Constraints: none
  Metadata_Extensions:
    Online_Linkage: http://www.esri.com/metadata/esriprof80.html
    Profile_Name: ESRI Metadata Profile
  Metadata_Extensions:
    Online_Linkage: http://www.esri.com/metadata/esriprof80.html
    Profile_Name: ESRI Metadata Profile