Spatial Digital Database for the Geologic Map of Nevada Geology compiled by John H. Stewart and John E. Carlson Digital database by Gary L. Raines, Katherine A. Connors1, Lorre A. Moyer, and Robert J. Miller Open File Report 03-66 Digital database, version 3.0 2003 (map originally published in 1978) Database approved for publication February 20, 2003 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. The digital database is not meant to be used or displayed at any scale larger than 1:500,000. U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Table of Contents INTRODUCTION 3 DATA SOURCES, PROCESSING, AND ACKNOWLEDGEMENTS 3 GIS DOCUMENTATION 4 LINEAR FEATURES 5 AREAL FEATURES 6 SOURCE ATTRIBUTES 8 OBTAINING DIGITAL DATA 8 OBTAINING PAPER MAPS 9 REFERENCES CITED 9 APPENDIX A - LIST OF DIGITAL FILES IN THE NEVADA GIS 10 APPENDIX B - METADATA FILE (NVGEO.MET) FOR THE NEVADA GIS 11 List of Figures Figure 1: Relationships between feature attribute tables and look-up tables. 4 Introduction This report describes and makes available 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). 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). This report also describes the methods used to convert the geologic map data into a digital format, describes the ArcInfo GIS file structures and relationships, and explains how to download the digital files from the U.S. Geological Survey public access World Wide Web site on the Internet. Scanned images of the 1991 reprinting of the Stewart and Carlson (1978a) map are also available for download. Data Sources, Processing, and Acknowledgements A digital version of Stewart and Carlson's (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. 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, several enhancements have been made. 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. This was done as part an effort to produce a mosaic of state geologic map databases for the entire United States. All processing by the U.S. Geological Survey was done in Arc/Info versions 5, 7, and 8 installed on Unix and Windows workstations. Manuscript and digital data review by Helen Z. Kayser (contractor) is greatly appreciated. GIS Documentation 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, NVGEO.ST2 and NVGEO.REF files, and a rock unit table, NVGEO.PAT, that relates to the NVGEO.RU and NVGEO.REF files (see fig. 1). These data files are described below. Arc attribute table and related look-up tables: Polygon attribute table and related look-up tables: NVGEO.AAT NVGEO.PAT linecode map_unit fault_cont unit dwnthrwn source_id source_id spatial_obj_id spatial_obj_id NVGEO.CON NVGEO.RU linecode map_unit symbol unit type symbol modifier label certainty label-gaf desc name lith NVGEO.ST2 lith1 linecode lith2 symbol lith3 type desc horizontal minage vertical maxage fold source_id plunge accuracy certainty desc NVGEO.REF NVGEO.REF source_id source_id scale scale authors authors year year reference reference comment comment Figure 1: Relationships between feature attribute tables and look-up tables. Linear Features Descriptions of the items identifying linear features such as contacts, boundaries (for example, lines of latitude and longitude, state boundaries) and structures in the arc (or line) attribute table, NVGEO.AAT, are as follows: NVGEO.AAT ITEM NAME ITEM TYPE ITEM LENGTH ATTRIBUTE DESCRIPTION linecode integer 3 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. fault_cont character 4 Indicates fault constitutes a contact between rock units dwnthrwn character 5 Indicates the sense of movement on the fault. The side indicated by the compass direction is downdropped. source_id integer 4 Numeric code used to identify the data source for the linear feature. Complete references for the sources are listed in the NVGEO.REF file. spatial_obj_id integer 12 Unique numeric identifier for each object in the nvgeo feature attribute tables (nvgeo.aat and nvgeo.pat). (This numeric identifier is NOT duplicated in the nvgeo.pat feature attribute table.) Attribute descriptions for items in the contact (and boundary) lookup-table, NVGEO.CON are as follows: NVGEO.CON ITEM NAME ITEM TYPE ITEM LENGTH ATTRIBUTE DESCRIPTION linecode integer 3 Numeric code (a value < 100) used to identify type of contact or boundary. (This item also occurs in NVGEO.AAT.) symbol integer 3 Line symbol number used by Arc/Info to plot lines. Symbol numbers refer to the WP.LIN lineset type character 10 Major type of line, for example, contact, state boundaries, lines of latitude and longitude used for neatlines. modifier character 20 Line type modifier, for example, approximate, concealed, gradational. No entry implies 'known.' certainty character 15 Degree of certainty of contact or boundary, for example, inferred, uncertain. No entry implies 'certain.' desc character 100 Written description or explanation of contact or boundary. Attribute descriptions for items in the structure look-up table, NVGEO.ST2, are as follows: NVGEO.ST2 ITEM NAME ITEM TYPE ITEM LENGTH ATTRIBUTE DESCRIPTION linecode integer 3 Numeric code (a value > 100 and < 600) used to identify type of structural feature. (This item also occurs in NVGEO.AAT.) symbol integer 3 Line symbol number used by Arc/Info to plot arc (line). Symbol numbers refer to the GEOL_SFO.LIN lineset. type character 10 Major type of structure, i.e., fault, fracture, fold, other. horizontal character 20 Type of horizontal fault movement, for example, left-lateral, right-lateral. No entry implies 'unknown.' vertical character 20 Type of vertical fault movement, for example, normal. No entry implies 'unknown.' fold character 15 Type of fold, e.g., anticline, syncline. plunge character 15 Type of plunge on fold, i.e., horizontal, plunging, plunging in, plunging out. accuracy character 15 Line type modifier indicating degree of accuracy, i.e., approximately located, concealed, gradational. No entry implies 'known.' certainty character 15 Degree of certainty of contact or boundary, i.e., inferred, uncertain. No entry implies 'certain.' desc character 100 Written description or explanation of structural feature. Areal Features Descriptions of the items identifying geologic units in the polygon attribute table, NVGEO.PAT are as follows: NVGEO.PAT ITEM NAME ITEM TYPE ITEM LENGTH ATTRIBUTE DESCRIPTION map_unit character 10 Rock unit label. Rock unit is described in the NVGEO.RU look-up table. (This item also occurs in NVGEO.RU.) unit integer 4 Numeric code used to identify rock unit. (This item also occurs in NVGEO.RU.) source_id integer 4 Numeric code used to identify the data source for the rock unit. Complete references for the sources are listed in the NVGEO.REF file. spatial_obj_id integer 12 Unique numeric identifier for each object in the nvgeo feature attribute tables (nvgeo.aat and nvgeo.pat). (This numeric identifier is NOT duplicated in the nvgeo.aat feature attribute table.) Attribute descriptions for items in the lithology (rock unit) look-up table, NVGEO.RU, are as follows: NVGEO.RU ITEM NAME ITEM TYPE ITEM LENGTH ATTRIBUTE DESCRIPTION map_unit character 10 Alphanumeric code used to identify rock unit. (This item also occurs in NVGEO.PAT.) unit integer 4 Numeric code used to identify rock unit. (This item also occurs in NVGEO.PAT.) symbol integer 3 Shadeset symbol number used by Arc/Info to plot a filled/shaded polygon. The symbol numbers used in this file refer to the alc1.shd shadeset. label character 10 Rock unit label (abbreviation) for use with standard alphabetic characters. label-gaf character 10 Rock unit label (abbreviation) that uses the GeoAgeFullAlpha font, ver. 1.1 (Richard Koch, personal commun., 2001). lith character 50 Major type of lithostratigraphic unit, for example, unconsolidated sediments, sedimentary rocks, metasedimentary rocks, intrusive rocks, extrusive rocks, metamorphic rocks, water, ice. lith1 character 20 primary lithology lith2 character 18 secondary lithology lith3 character 32 tertiary lithology desc character 250 Formal or informal unit name minage character 7 Minimum stratigraphic age of lithologic unit, for example, CRET, TERT, M PROT. maxage character 7 Maximum stratigraphic age of lithologic unit source_id integer 4 Numeric code used to identify the data source for the rock unit. Complete references for the sources are listed in the NVGEO.REF file. Source Attributes Descriptive source or reference information is stored in the NVGEO.REF look-up table. Attribute descriptions for items in the NVGEO.REF file is as follows: NVGEO.REF ITEM NAME ITEM TYPE ITEM LENGTH ATTRIBUTE DESCRIPTION source_id integer 4 Numeric code used to identify the data source. (This item also occurs in the NVGEO.AAT, and NVGEO.PAT files.) scale integer 8 Scale of source map. (This value is the denominator of the proportional fraction that identifies the scale of the map that was digitized or scanned to produce the digital map.) authors character 200 Author(s) or compiler(s) of source map entered as last name, first name or initial, and middle initial. year integer 4 Source (map) publication date reference character 250 Remainder of reference in USGS reference format. comment character 100 Notes/comments about the source information/data Obtaining Digital Data The complete digital version of the geologic map is available in Arc/Info interchange format with associated data files. These data are maintained in a Lambert coordinate system: Projection: Lambert Conformal Conic Units: meters Datum: NAD27 Spheroid: Clarke1866 Central meridian -117 00 00 Standard parallel 33 00 00 Standard parallel 45 00 00 To obtain copies of the digital data, do the following: * Download from the USGS public access World Wide Web site on the Internet: URL = http://pubs.usgs.gov/of/2003/of03-66/ This Internet sites contains the spatial data and metadata for the geologic map of the Nevada as ArcInfo exchange-format files (see listing of files in Appendix A). Formatted metadata (Federal Geographic Data Committee-compliant) is included as Appendix B. To manipulate this data in a spatial database, you must have a GIS platform that is capable of importing ArcInfo interchange-format files. Obtaining Paper Maps Printed copies of the Stewart and Carlson (1978a) Geologic Map of Nevada are available for purchase from the U.S. Geological Survey Earth Science Information Center. Digital JPEG images of their map sheets are also available as sc1978nv_north.jpg/.jgw (north half of Nevada), sc1978nv_south.jpg/.jgw (south half of Nevada), and sc1978nv_units.jpg (correlation of map units). These files may be downloaded from the USGS public access World Wide Web site on the Internet using the URL = http://pubs.usgs.gov/of/2003/of03-66/ Paper copies of the geologic map created from the nvgeo spatial database are not available from the U.S. Geological Survey. Paper copies of the map may be created by obtaining the digital spatial database (nvgeo) and then creating a custom plot file in a GIS. References Cited Raines, G.L., Sawatzky, D.L., and Connors, K.A., 1996, Great Basin geoscience data base: U.S. Geological Survey, Digital Data Series DDS-41, 2 CD-ROMs. Stewart, J.H. and Carlson, J.E., 1978a, Geologic map of Nevada: U.S. Geological Survey, scale 1:500,000, 2 sheets. Stewart, J.H. and Carlson, J.E., 1978b, Sources of data for geologic map of Nevada: U.S. Geological Survey, Miscellaneous Field Investigation MF-930. Turner, R.M. and Bawiec, W.J., 1991, Digital geologic coverage of Nevada: a digital representation of the 1978 geologic map of Nevada: U.S. Geological Survey, Digital Data Series DDS-2, CD-ROM. Appendix A - List of digital files in the Nevada GIS --Use the 'importfile.aml' to IMPORT all of the *.e00 files for use in ArcInfo. Primary ArcInfo exchange-format (*.e00) and metadata (*.met) files for the spatial digital databases: * nvgeo.e00 - line and poly dataset (contacts, faults, and map units) in Lambert Conformal Conic map projection * nvgeo.met - metadata JPEG image (*.jpg/.jgw) and Adobe Acrobat portable document format (*.pdf) files for the Stewart and Carlson map sheets (1978a and 1978b): * sc1978nv_north.jpg/.jgw - north half of Nevada (georeferenced image) * sc1978nv_south.jpg/.jgw - south half of Nevada (georeferenced image) * sc1978nv_sym.pdf - explanation of line symbols * sc1978nv_units.jpg - correlation of map units Appendix B - Metadata file (nvgeo.met) for the Nevada GIS 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://pubs.usgs.gov/of/2003/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 ƒolder 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://pubs.usgs.gov/of/2003/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://pubs.usgs.gov/of/2003/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 1 present address: Geologic Data Systems, Denver, Colorado 80218