Identification_Information: Citation: Citation_Information: Originator: Scott C. Lundstrom Originator: Shannon A. Mahan Originator: Richard J. Blakely Originator: James B. Paces Originator: Owen D. Young Originator: Jeremiah B. Workman Originator: Gary L. Dixon Publication_Date: 2003 Title: Geologic Map of the Mound Spring Quadrangle, Nye and Clark Counties, Nevada, and Inyo County, California Edition: version 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Miscellaneous Field Studies Map Issue_Identification: MF-2339 Publication_Information: Publication_Place: Denver, Colorado Publisher: U. S. Geological Survey Online_Linkage: http://pubs.usgs.gov/pub/mf/2003/mf-2339 Description: Abstract: The Mound Spring quadrangle, the southwestern-most 7.5' quadrangle of the area of the Las Vegas 1:100,000-scale quadrangle, is entirely within the Pahrump Valley, spanning the Nevada/California State line. New geologic mapping of the predominantly Quaternary materials is combined with new studies of gravity and geochronology in this quadrangle. Eleven predominantly fine-grained units are delineated, including playa sediment, dune sand, and deposits associated with several cycles of past groundwater discharge and distal fan sedimentation. These units are intercalated with 5 predominantly coarse-grained alluvial-fan and wash gravel units mainly derived from the Spring Mountains. The gravel units are distinguished on the basis of soil development and associated surficial characteristics. Thermoluminescence and U-series geochronology constrain most of the units to the Holocene and late and middle Pleistocene. Deposits of late Pleistocene groundwater discharge in the northeast part of the quadrangle are associated with a down-to-the-southwest fault zone that is expressed by surface fault scarps and a steep gravity gradient. The gravity field also defines a northwest-trending uplift along the State line, in which the oldest sediments are poorly exposed. About 2 km to the northeast a prominent southwest-facing erosional escarpment is formed by resistant beds in middle Pleistocene fine-grained sediments that dip northeast away from the uplift. These sediments include cycles of groundwater discharge that were probably caused by upwelling of southwesterly groundwater flow that encountered the horst. Purpose: This map was produced in conjunction with the Las Vegas 1:100,000-scale geologic map to fill in previously unmapped areas of surficial geology in the Pahrump Valley area. Mapping in the Pahrump Valley at 1:24,000 scale has been completed jointly by the USGS (Mound Spring quadrangle and Hidden Hills Ranch quadrangle) and the Nevada Bureau of Mines and Geology (Pahrump quadrangle). Mapping was prepared in cooperation with the Nye County Nuclear Waste Repository Project Office. Gravity data was collected to help define the basement structure of the basin and surficial mapping was completed to define the areal extent of deposits, surface expressions of basement structure, areas of past groundwater discharge, areas of surface rupture due to expanding soils and groundwater withdrawl, and significant flash-flood hazards. Dating of soil samples was completed to refine the Cenozoic stratigraphy and correlate surficial units between Pahrump Valley and other nearby basins. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2000 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -116.000 East_Bounding_Coordinate: -115.875 North_Bounding_Coordinate: 36.125 South_Bounding_Coordinate: 36.000 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Geologic mapping Theme_Keyword: Surficial geologic mapping Theme_Keyword: paleospring discharge Theme_Keyword: playa Theme_Keyword: quaternary fault scarp Theme_Keyword: alluvial fan Theme_Keyword: U-series disequilibrium geochronology Theme_Keyword: thermoluminescence geochronology Theme_Keyword: gravity contours Theme_Keyword: basin depth Theme_Keyword: Pahrump Valley fault Theme_Keyword: eolian dunes Place: Place_Keyword_Thesaurus: None Place_Keyword: Nevada Place_Keyword: California Place_Keyword: Clark County Place_Keyword: Nye County Place_Keyword: Inyo County Place_Keyword: Pahrump Valley Place_Keyword: Pahrump Place_Keyword: Mound Spring Place_Keyword: Pahrump playa Access_Constraints: None Use_Constraints: None Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jeremiah B. Workman Contact_Organization: U. S. Geological Survey Contact_Address: Address_Type: Mailing Address Address: Box 25046 Address: Denver Federal Center, MS-913 City: Denver State_or_Province: CO Postal_Code: 80225 Country: U.S.A. Contact_Voice_Telephone: 303-236-1257 Contact_Electronic_Mail_Address: jworkman@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/pub/mf/2003/mf-2339 Browse_Graphic_File_Description: graphical representation of map Browse_Graphic_File_Type: PDF Native_Data_Set_Environment: SunOS 5.7, sun4m UNIX ARC/INFO version 7.1.2 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The database was digitized in GSMCAD (Williams, 1996) which does not allow unattributed lines so there are no unlabeled lines in the database. Frequency tests were run on the polygon labels to ensure that no polygons are unlabeled. The attributes have been checked by both the authors and the reviewers for agreement with field maps, annotated airphotos, annotated orthophoto quads, and preliminary drafted versions of the map. The attribute data in the data set should be taken as an accurate representation of the authors' geologic interpretations. Logical_Consistency_Report: The entire study area was mapped both by photo-interpretation of aerial photographs at 1:31,680-scale and the orthophoto-quadrangle at 1:24,000-scale, and by field work which was compiled at 1:24,000-scale. The entire map area was mapped at the same level of detail, by the same geologist (Lundstrom), over a single field season. All linework was digitized at 1:24,000-scale and attributes added using GSMCAD (Williams, 1996). All lines were visually inspected by the authors for proper intersections, repetition, overshoots, undershoots, and overall logical consistency. The geologic features in the map area are all described, in the view of the authors, at a consistent scale of 1:24,000. All coverages were cleaned and built in ARC/INFO (version 7.1.2) to ensure a logical consistency which is topologically clean. Completeness_Report: This dataset includes only the coverages pertaining to the geologic map. Any margin material on the printed map (correlation chart, explanation of map symbols) is not included. This map was produced to be used at 1:24,000-scale. Any geologic features too small to be shown at this scale have been omitted or generalized if they are of significant importance. The smallest objects are approximately 12 meters on a side. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The estimated horizontal positional accuracy of the data is 6 meters. Photo-interpretation from aerial photographs at 1:31,680-scale was transfered to 1:24,000-scale stable base maps using a PG-2 stereographic plotter. All other mapping was conducted by field investigation and orthophoto-interpretation at 1:24,000-scale. All linework was digitized at 1:24,000-scale using a CalComp digitizing tablet (model 34360) with an accuracy of 0.005 inches (3 meters at map scale). This database was produced to be used at 1:24,000-scale and any problems arising from use at other scales are not the responsibilities of the authors. No vertical data is included in the database. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Anderson, R.E. Originator: Crone, A.J. Originator: Machette, M.N. Originator: Bradley, L.A. Originator: Diehl, S.F. Title: Characterization of Quaternary and suspected Quaternary Faults, Amargosa area, Nevada and California Publication_Date: 1995 Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 95-613 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Anderson et al. (1995) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Bell, J.W. Originator: Ramelli, A.R. Originator: Caskey, S.J. Title: Geologic Map of the Tule Springs Park Quadrangle, Clark County, Nevada Publication_Date: 1998 Series_Information: Series_Name: Nevada Bureau of Mines and Geology Map Issue_Identification: 113 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Bell et al. (1998) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Blakely, R.J. Originator: Simpson, R.W. Title: Approximating edges of source bodies from magnetic or gravity anomalies Publication_Date: 1986 Series_Information: Series_Name: Geophysics Issue_Identification: v. 51 Other_Citation_Details: pp. 1494-1498 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1986 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Blakely and Simpson (1986) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Blakely, R.J Originator: Morin, R.L. Originator: Faunt, C.C. Title: Looking beneath the subsurface: a three-dimensional geophysical view of the Death Valley Region, California and Nevada, in Slate, J.L, ed., Proceedings of conference on status of geologic research and and mapping, Death Valley National Park Publication_Date: 1999 Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 99-153 Other_Citation_Details: pp. 47-51 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Blakely et al. (1999a) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Blakely, R.J. Originator: Jachens, R.C. Originator: Calzia, J.P. Originator: Langenheim, V.E. Title: Cenozoic basins of the Death Valley extended terrane as reflected in regional-scale gravity anomalies, in Wright, L.A., and Troxel, B.W., eds., Cenozoic Basins of the Death Valley Region Publication_Date: 1999 Series_Information: Series_Name: Geoogical Society of America Special Paper Issue_Identification: 3333 Publication_Information: Publication_Place: Denver, CO Publisher: Geological Society of America Other_Citation_Details: pp. 1-16 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Blakely et al. (1999b) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Bohannon, R.G. Title: Geologic map, tectonic map and structure sections of the Muddy and northern Black Mountains, Clark County, Nevada Publication_Date: 1983 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Investigations Series Map Issue_Identification: I-1406 Source_Scale_Denominator: 62500 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1983 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Bohannon (1983) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Bohannon, R.G. Title: Nonmarine sedimentary rocks of Tertiary age in the Lake Mead region, southeastern Nevada Publication_Date: 1984 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 1259 Other_Citation_Details: 72 p. Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1984 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Bohannon (1984) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Burchfiel, B.C. Originator: Fleck, R.J. Originator: Secor, D.T. Originator: Vincelette, R.R. Originator: Davis, G.A. Title: Geology of the Spring Mountains, Nevada Publication_Date: 1974 Series_Information: Series_Name: Geological Society of America Bulletin Issue_Identification: v. 85 Other_Citation_Details: p. 1013-1022 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1974 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Burchfiel et al. (1974) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: DePolo, C.M. Originator: Ramelli, A.R. Originator: Bell, J.W. Title: Geologic map of the Pahrump Quadrangle, Nevada Publication_Date: 1999 Series_Information: Series_Name: Nevada Bureau of Mines and Geology Open-File Report Issue_Identification: 99-14 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: DePolo et al. (1999) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Gile, L.H. Originator: Peterson, F.F. Originator: Grossman, R.B. Title: Morphological and genetic sequences of carbonate accumulation in desert soils Publication_Date: 1966 Series_Information: Series_Name: Soil Science Issue_Identification: v. 101 Other_Citation_Details: pp. 347-360 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1966 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Gile et al. (1966) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Harrill, J.R. Title: Ground-water storage depletion, Pahrump Valley, Nevada-California 1962-75 Publication_Date: 1986 Series_Information: Series_Name: U.S. Geological Survey Water-Supply Paper Issue_Identification: 2279 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1986 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Harrill (1986) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Haynes, C.V. Title: Quaternary Geology of the Tule Springs Area, Clark County, Nevada, in Pleistocene Studies of Southern Nevada, Wormington, H.M., and Ellis, D., Eds. Publication_Date: 1967 Series_Information: Series_Name: Nevada State Museum Anthropological Paper Issue_Identification: no. 13 Other_Citation_Details: pp. 1-104 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1967 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Haynes (1967) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Hoffard, J.L. Title: Quaternary tectonics and basin history of Pahrump and Stewart Valleys, Nevada and California Publication_Date: 1991 Publication_Information: Publication_Place: Reno, NV Publisher: University of Nevada, Reno Other_Citation_Details: M.S. thesis Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1991 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Hoffard (1991) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Maldonado, F. Originator: Schmidt, D.L. Title: Geologic Map of the southern Sheep Range, Fossil ridge, and Castle Rock area, Clark County, Nevada Publication_Date: 1991 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Investigations Series Map Issue_Identification: MF-2182. Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1991 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Maldonado and Schmidt (1991) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Malmberg, G.T. Title: Hydrology of the valley-fill and carbonate-rock reservoirs, Pahrump Valley, Nevada-California Publication_Date: 1967 Series_Information: Series_Name: U.S. Geological Survey Water-Supply Paper Issue_Identification: 1832 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1967 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Malmberg (1967) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: McMackin, M.R. Title: Geology of the Stump Spring Quadrangle-Evidence of late Quaternary transpression on the southern segment of the Pahrump Valley fault zone, Nevada and California, in Slate, J.L, ed., Proceedings of conference on status of geologic research and and mapping, Death Valley National Park Publication_Date: 1999 Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 99-153 Other_Citation_Details: p. 162 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: McMackin (1999) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Quade, J. Title: Late Quaternary environmental changes in the upper Las Vegas Valley, Nevada Publication_Date: 1986 Series_Information: Series_Name: Quaternary Research Issue_Identification: v. 26 Other_Citation_Details: pp. 340-357 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1986 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Quade (1986) Source_Contribution: Mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Quade, J. Originator: Mifflin, M.D. Originator: Pratt, W.L. Originator: McCoy, W. Originator: Burckle, L. Title: Fossil Spring Deposits in the southern Great Basin and their implications for changes in water-table levels near Yucca Mountain, Nevada, during Quaternary time Publication_Date: 1995 Series_Information: Series_Name: Geological Society of America Bulletin Issue_Identification: v. 107 Other_Citation_Details: pp. 213-230 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Quade et al. (1995) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Schmidt, K.M. Originator: Davidson, J.G. Title: Using geomorphic features to constrain tectonic activity near Pahrump Valley, Nevada and California, in Slate, J.L, ed., Proceedings of conference on status of geologic research and and mapping, Death Valley National Park Publication_Date: 1999 Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 99-153 Other_Citation_Details: pp. 154-155 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Schmidt and Davidson (1999) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Spaulding, W.G. Originator: Quade, J. Title: The Quaternary paleoecology and paleohydrology of the eastern Mojave Desert Publication_Date: 1996 Series_Information: Series_Name: guidebook Issue_Identification: 1996 American Quaternary Association Meetings Publication_Information: Publication_Place: Flagstaff, AZ Publisher: American Quaternary Association Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1996 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Spaulding and Quade (1996) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Waring, G.A. Title: Ground water in Pahrump, Mesquite, and Ivanpah valleys, Nevada and California Publication_Date: 1920 Series_Information: Series_Name: U.S. Geological Survey Water-Supply Paper Issue_Identification: 450-C Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1920 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Waring (1920) Source_Contribution: mapping source information Source_Information: Source_Citation: Citation_Information: Originator: Williams, Van S. Title: GSMCAD, a new computer program that combines the functions of the GSMAP and GSEDIT programs and is compatible with Microsoft Windows and ARC/INFO Publication_Date: 1996 Series_Information: Series_Name: U. S. Geological Survey Open-File Report Issue_Identification: 96-007 Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1996 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Williams (1996) Source_Contribution: software for digitizing linework Source_Information: Source_Citation: Citation_Information: Originator: Workman, J.B. Originator: Lundstrom, S.C. Originator: Blackely, R.J. Originator: Dixon, G.L. Title: Geologic map of the Hidden Hills Ranch Quadrangle Clark County, Nevada Publication_Date: unpublished material Other_Citation_Details: in review Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2000 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Workman et al. (in press) Source_Contribution: mapping source information Process_Step: Process_Description: Linework and labels digitized and attributed in GSMCAD (Williams, 1996). Process_Date: 1998 to 1999 Process_Step: Process_Description: Map and digital files reviewed by Jeremiah Workman (USGS) and edits made in ARC/INFO. Process_Date: 1999 Process_Step: Process_Description: Map reviewed by William Page (USGS) and edits made in ARC/INFO. Process_Date: 1999 Process_Step: Process_Description: Data set exported and compressed for publication and digital release. Process_Date: 2000 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 11 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -117.0 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.6 Ordinate_Resolution: 0.6 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: All coverages contain the standardized attributes for arcs and polygons assigned by ARC/INFO. For arcs these attributes are: COLUMN--ITEM_NAME----------WIDTH-----OUTPUT-----TYPE---#_DECIMALS 1-------FNODE#---------------4----------5---------B---------\ 5-------TNODE#---------------4----------5---------B---------\ 9-------LPOLY#---------------4----------5---------B---------\ 13------RPOLY#---------------4----------5---------B---------\ 17------LENGTH---------------8---------18---------F---------5 25------#-------------4----------5---------B---------\ 29-------ID-----------4----------5---------B---------\ For polygons these attributes are: COLUMN--ITEM_NAME----------WIDTH-----OUTPUT-----TYPE---#_DECIMALS 1-------AREA-----------------8---------18---------F---------5 9-------PERIMETER------------8---------18---------F---------5 17------#-------------4----------5---------B---------\ 21-------ID-----------4----------5---------B---------\ The database consists of seven coverages (and one related scan; see Supplemental_Information) which contain the folowing data: COVERAGE------------ENTITIES-----------DESCRIPTION MOUNDSPG-GEO--------POLY/ARC-----------Geologic contacts and unit labels. MOUNDSPG-FLT--------ARC----------------Geologic structures including faults, fold axes, and tension cracks. MOUNDSPG-ATT--------POINT--------------Bedding attitudes. MOUNDSPG-SYM--------ARC----------------Graphical representation of fault offset symbols (strike-slip arrows and bar-and-balls). MOUNDSPG-GRV--------ARC----------------Graphical representation of gravity contours (includes contour values). MOUNDSPG-DAT--------POINT/ARC----------U-series and thermoluminescence sample locations and graphical representation of symbols. MOUNDSPG-TXT--------POINT/ARC----------Unit label points and leader lines. The individual attributes for each coverage are described as follows: MOUNDSPG-GEO (polygon attributes): UNIT--Character attribute for rock unit from text (see table below); SYMBOL--Integer attribute for polygon shade symbol from shadeset color524.shd (see table below). MOUNDSPG-GEO (arc attributes): CODE--Integer attribute for line type (see table below); DESCRIPTION--Character attribute for line type description (see table below). MOUNDSPG-FLT (arc attributes): CODE--Integer attribute for line type (see table below); DESCRIPTION--Character attribute for line type description (see table below). MOUNDSPG-ATT (point attributes): CODE--Integer attribute for line type (see table below); DESCRIPTION--Character attribute for line type description (see table below); AZIMUTH--Integer attribute for bedding attitude strike azimuth (clockwise from north); DIP--Integer attribute for bedding attitude dip value. MOUNDSPG-SYM (arc attributes): CODE--Integer attribute for line type (see table below); DESCRIPTION--Character attribute for line type description (see table below). MOUNDSPG-GRV (arc attributes): Only standard ARC attributes. MOUNDSPG-DAT (arc attributes): Only standard ARC attributes. MOUNDSPG-DAT (point attributes): SAMPLE-ID--Character attribute for U-series and thermoluminescence sample name. MOUNDSPG-TXT (arc attributes): Only standard ARC attributes. MOUNDSPG-TXT (point attributes): UNIT--Character attribute for rock unit from text (see table below). UNIT/SYMBOL attribute values (see map text for explanation of lithologic units): QTa,109 Qai,85 Qau,108 Qay,39 Qayo,40 Qayy,2 Qbo,224 Qbw,222 Qby,216 Qd,19 Qfo,102 Qfy,100 Qpy,6 Qscd,225 Qse,224 Qsu,233 Qsy,221 CODE/DESCRIPTION attribute values: 4 ,"definite contact in quaternary" 5 ,"inferred contact in quaternary" 10 ,"definite high angle fault" 11 ,"inferred high angle fault" 12 ,"concealed high angle fault" 20 ,"definite fold axis" 21 ,"inferred fold axis" 22 ,"concealed fold axis" 88 ,"tension crack" 99 ,"map boundary" 201 ,"bedding strike and dip" 207 ,"bar and ball" 210 ,"right-lateral strike-slip" Please refer to the ARC/INFO documentation for explanations of the standard attributes. Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Central Publications Group Address: Box 25046 Address: Denver Federal Center, MS-902 City: Denver State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 303-236-5486 Distribution_Liability: Although this digital spacial data has been subjected to rigorous review and is substantially complete, it is released on the condition that neither the USGS nor the United States Government may be held liable for any damage resulting from its authorized or unauthorized use. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARE, SHP Format_Version_Number: ArcInfo version 7.12 File_Decompression_Technique: .tar.gz - UNIX gzip-compressed TAR file- use GNU zip and TAR .exe - self-extracting Windows ZIP archive- execute the file to extract Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/pub/mf/2003/mf-2339 Fees: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U. S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS Information Services Address: Box 25046 City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Resource_Description: MF-2339 (Map-on-Demand) Distribution_Liability: None Standard_Order_Process: Non-digital_Form: Available as one printed sheet with pamphlet. Order from USGS at the address listed above or see http://rockyweb.cr.usgs.gov/mod/ for more ordering information. Fees: See http://rockyweb.cr.usgs.gov/mod/ for current prices. Metadata_Reference_Information: Metadata_Date: 20000106 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jeremiah B. Workman Contact_Organization: U. S. Geological Survey Contact_Address: Address_Type: mailing address Address: Box 25046 Address: Denver Federal Center, MS-913 City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-1257 Contact_Electronic_Mail_Address: jworkman@usgs.gov Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none Metadata_Use_Constraints: none