Identification_Information: Citation: Citation_Information: Originator: Jeremiah B. Workman Originator: Scott C. Lundstrom Originator: Richard J. Blakely Originator: Gary L. Dixon Publication_Date: 2008 Title: Geologic Map of the Hidden Hills Ranch Quadrangle, Clark County, Nevada Edition: version 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: 3033 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/sim/3033 Description: Abstract: New mapping in the Hidden Hills Ranch quadrangle within the southern Pahrump Valley, Nevada, helps to define the Quaternary history of the southern Pahrump basin. New geologic mapping of the predominantly Quaternary sediments is combined with new studies of gravity data and previous studies of geochronology in the valley. Six predominantly fine-grained units associated with several cycles of past groundwater discharge and distal fan sedimentation are delineated. These units are intercalated with eight predominantly coarse-grained alluvial-fan and wash gravel units mainly derived from the Spring Mountains to the east. 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. Age control of these units constrains the age of several sets of faults within the map area associated with the right-lateral to right-obliquePahrump-Stewart Valley fault system (PSV). We can thereby define an early set of faults which formed a middle Pleistocene basin, extending across the map area, controlling deposition of the fine-grained basin-fill units of Browns Spring and a younger set of late to middle(?) Pleistocene faults which strike north into the West Spring Mountains fault zone (WSMFZ) representing the intersection of the main trace of the PSV with the WSMFZ. There is no evidence of Holocene faulting within the map area. Purpose: This map was produced in conjunction with the Las Vegas and Death Valley Junction 1:100,000-scale geologic maps to fill in previously unmapped areas of surficial geology and to help define the geologic history and structure of 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 and Sixmile Spring quadrangle). Mapping was prepared in cooperation with the Nye County Nuclear Waste Repository Project Office. Gravitydata 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 withdrawal, and significant flash-flood hazards. Detailed description of surficial units was completed to refine the Cenozoic stratigraphy and correlate surficial units between Pahrump Valley and other nearby basins. Supplemental_Information: A scan of the topographic base (hhr-base.tif) is provided as a georeferenced tiff image in the same transverse mercator projection as defined below. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2005 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -115.875 East_Bounding_Coordinate: -115.750 North_Bounding_Coordinate: 36.125 South_Bounding_Coordinate: 36.000 Keywords: Theme: Theme_Keyword_Thesaurus: AGI Glossary of Geology Theme_Keyword: geologic mapping Theme_Keyword: surficial geology Theme_Keyword: paleospring discharge Theme_Keyword: quaternary basin-fill Theme_Keyword: quaternary fault scarp Theme_Keyword: alluvial fan Theme_Keyword: gravity contours Theme_Keyword: State Line fault zone Theme_Keyword: Pahrump-Stewart Valley fault system Theme_Keyword: West Spring Mountains fault zone Theme_Keyword: Pahrump Valley fault zone Theme_Keyword: basin structure Theme_Keyword: basin geometry Theme_Keyword: basin history Theme_Keyword: Pahrump basin Theme_Keyword: East Nopah fault zone Place: Place_Keyword_Thesaurus: U.S. Board on Geographic Names Place_Keyword: Nevada Place_Keyword: Pahrump Place_Keyword: Clark County Place_Keyword: Hidden Hills Ranch Place_Keyword: Cathedral Canyon Place_Keyword: Trout Canyon Place_Keyword: Browns Spring Place_Keyword: Mound Spring Place_Keyword: Stump Spring Place_Keyword: Stewart Valley Place_Keyword: Pahrump Valley Place_Keyword: Las Vegas Valley Place_Keyword: Spring Mountains Place_Keyword: Yucca Mountain Place_Keyword: Kingston Range Place_Keyword: Nopah Range Access_Constraints: None Use_Constraints: None. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. 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-980 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/sim/3033 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 8.1 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 (Workman), 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 8.1) 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, or figures) 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: Haynes, C.V. Publication_Date: 1967 Title: Quaternary Geology of the Tule Springs Area, Clark County, Nevada Series_Information: Series_Name: Nevada State Museum Anthropological Paper Issue_Identification: no. 13 Other_Citation_Details: p. 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: Quade, J. Publication_Date: 1986 Title: Late Quaternary environmental changes in the upper Las Vegas Valley, Nevada Series_Information: Series_Name: Quaternary Research Issue_Identification: v. 26 Other_Citation_Details: p. 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: Williams, Van S. Publication_Date: 1996 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 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 Process_Step: Process_Description: Field mapping Process_Date: 1997 to 1998 Process_Step: Process_Description: Geology mapped on 1:31,680-scale aerial photographs and 1:24,000-scale orthophoto quadrangle. Process_Date: 1997 to 1998 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 Van Williams (USGS) and edits made in GSMCAD. Process_Date: 1999 Process_Step: Process_Description: Map reviewed by William Page (USGS) and edits made in GSMCAD. Process_Date: 1999 Process_Step: Process_Description: Data converted from GSMCAD to ARC/INFO coverages. Process_Date: 1999 Process_Step: Process_Description: Map submitted to Tom Judkins (USGS) for Geologic Names Unit (GNU) review and edits made in ARC/INFO. Process_Date: 2004 Process_Step: Process_Description: Map submitted for final team approval and files provided to publications group. Process_Date: 2005 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Transverse Mercator Transverse_Mercator: Scale_Factor_at_Central_Meridian: .9999 Longitude_of_Central_Meridian: -115.583333333333 Latitude_of_Projection_Origin: 0.0 False_Easting: 0.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 6 Ordinate_Resolution: 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: *The database consists of three ARC/INFO coverages (and one related image file; see Supplemental_Information) which contain the folowing data: *--------------------------------------------------------------- *COVERAGE---ENTITIES----DESCRIPTION * *HHR-GEO----POLY/ARC----Contacts and unit labels * *HHR-FLT----ARC---------Faults * *HHR-GRV----ARC---------Gravity contours * *--------------------------------------------------------------- *COVERAGE NAME: hhr-geo *--------------------------------------------------------------- * *Description of DOUBLE precision coverage hhr-geo * * FEATURE CLASSES * * Number of Attribute Spatial *Feature Class Subclass Features data (bytes) Index? Topology? *------------- -------- --------- ------------ ------- --------- *ARCS 738 132 *POLYGONS 301 132 Yes *NODES 563 * *SECONDARY FEATURES * *Tics 16 *Arc Segments 15580 *Polygon Labels 300 * *TOLERANCES * *Fuzzy = 1.389 V *Dangle = 0.000 V * *COVERAGE BOUNDARY * *Xmin = -26297.863 Xmax = -15002.394 *Ymin = 3984956.500 Ymax = 3998851.250 * *STATUS * *The coverage has not been Edited since the last BUILD or CLEAN. * *COORDINATE SYSTEM DESCRIPTION * *Projection TRANSVERSE *Units METERS *Spheroid CLARKE1866 *Parameters: *scale factor at central meridian 0.99990000 *longitude of central meridian -115 35 0.00 *latitude of origin 0 0 0.000 *false easting (meters) 0.00000 *false northing (meters) 0.00000 * *COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME INDEXED? *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 HHR-GEO# 4 5 B - - *29 HHR-GEO-ID 4 5 B - - *33 DESCRIPTION 100 100 C - - * * *COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME INDEXED? *1 AREA 8 18 F 5 - *9 PERIMETER 8 18 F 5 - *17 HHR-GEO# 4 5 B - - *21 HHR-GEO-ID 4 5 B - - *25 UNIT 8 8 C - - *33 DESCRIPTION 100 100 C - - * *USER-DEFINED ITEMS IN HHR-GEO.PAT: * *ATTRIBUTE NAME: UNIT *DATABASE ITEM STRUCTURE: 8,8,C,0 *DESCRIPTION: Unit symbol as displayed on paper map and defined in description of map units. * *ATTRIBUTE NAME: DESCRIPTION *DATABASE ITEM STRUCTURE: 100,100,C,0 *DESCRIPTION Unit name and age as defined in description of map units. *ITEM VALUES FOR 'UNIT', 'DESCRIPTION': *Qas, "Active stream alluvium (Holocene)" *Qayy, "Youngest alluvium (Holocene)" *Qay, "Young alluvium (Holocene and latest Pleistocene)" *Qayo, "Older young alluvium (Holocene and latest Pleistocene)" *Qau, "Undivided alluvium (Holocene and late Pleistocene)" *Qai, "Intermediate alluvium (late and middle(?) Pleistocene)" *Qao, "Old alluvium (middle and early(?) Pleistocene)" *QTa, "Gravelly basin-fill alluvium (early Pleistocene(?) to late Miocene)" *Qfy, "Intermittently active fluvial fine-grained alluvium (late Holocene)" *Qse, "Unit E of Haynes (1967) and Quade (1986) (early Holocene to latest Pleistocene)" *Qsu, "Undivided fine-grained deposits (Holocene and Pleistocene)" *Qby, "Upper part of basin-fill of Browns Spring (middle Pleistocene)" *Qbw, "Middle white limestone of basin-fill of Browns Spring (middle Pleistocene)" *Qbo, "Lower part of basin-fill of Browns Spring (middle and early(?) Pleistocene)" * *USER-DEFINED ITEMS IN HHR-GEO.AAT: * *ATTRIBUTE NAME: DESCRIPTION *DATABASE ITEM STRUCTURE: 100,100,C,0 *DESCRIPTION: FGDC compliant line type description *ITEM VALUES FOR 'DESCRIPTION': *"contact- approximately located" *"contact- certain" *"map boundary" *"normal fault- certain" * * *--------------------------------------------------------------- *COVERAGE NAME: hhr-flt *--------------------------------------------------------------- * * Description of DOUBLE precision coverage hhr-flt * * FEATURE CLASSES * * Number of Attribute Spatial *Feature Class Subclass Features data (bytes) Index? Topology? *------------- -------- --------- ------------ ------- --------- *ARCS 67 132 * *SECONDARY FEATURES * *Tics 16 *Arc Segments 297 * *TOLERANCES * *Fuzzy = 1.067 N *Dangle = 0.000 N * *COVERAGE BOUNDARY * *Xmin = -26179.990 Xmax = -17208.184 *Ymin = 3984961.750 Ymax = 3995628.250 * *STATUS * *The coverage has not been Edited since the last BUILD or CLEAN. * *COORDINATE SYSTEM DESCRIPTION * *Projection TRANSVERSE *Units METERS *Spheroid CLARKE1866 *Parameters: *scale factor at central meridian 0.99990000 *longitude of central meridian -115 35 0.00 *latitude of origin 0 0 0.000 *false easting (meters) 0.00000 *false northing (meters) 0.00000 * *COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME INDEXED? *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 HHR-FLT# 4 5 B - - *29 HHR-FLT-ID 4 5 B - - *33 DESCRIPTION 100 100 C - - * *USER-DEFINED ITEMS IN HHR-FLT.AAT: * *ATTRIBUTE NAME: DESCRIPTION *DATABASE ITEM STRUCTURE: 100,100,C,0 *DESCRIPTION: FGDC compliant line type description. *ITEM VALUES FOR 'DESCRIPTION': *"normal fault- certain" *"normal fault- concealed" * * *--------------------------------------------------------------- *COVERAGE NAME: hhr-grv *--------------------------------------------------------------- * *Description of DOUBLE precision coverage hhr-grv * * FEATURE CLASSES * * Number of Attribute Spatial *Feature Class Subclass Features data (bytes) Index? Topology? *------------- -------- --------- ------------ ------- --------- *ARCS 112 136 *NODES 506 * *SECONDARY FEATURES * *Tics 16 *Arc Segments 8896 * *TOLERANCES * *Fuzzy = 1.067 N *Dangle = 0.000 N * *COVERAGE BOUNDARY * *Xmin = -26297.863 Xmax = -15002.394 *Ymin = 3984956.500 Ymax = 3998851.250 * *STATUS * *The coverage has not been Edited since the last BUILD or CLEAN. * *COORDINATE SYSTEM DESCRIPTION * *Projection TRANSVERSE *Units METERS *Spheroid CLARKE1866 *Parameters: *scale factor at central meridian 0.99990000 *longitude of central meridian -115 35 0.00 *latitude of origin 0 0 0.000 *false easting (meters) 0.00000 *false northing (meters) 0.00000 * *COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME INDEXED? * 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 HHR-GRV# 4 5 B - - * 29 HHR-GRV-ID 4 5 B - - * 33 DESCRIPTION 100 100 C - - * 133 VALUE 3 3 I - - * * * *USER-DEFINED ITEMS IN HHR-GRV.AAT: *ATTRIBUTE NAME: DESCRIPTION *DATABASE ITEM STRUCTURE: 100,100,C,0 *DESCRIPTION: FGDC compliant line type description. *ITEM VALUES FOR 'DESCRIPTION': *"gravity contour" *"map boundary" * *ATTRIBUTE NAME: VALUE *DATABASE ITEM STRUCTURE: 3,3,I,0 *DESCRIPTION: Gravity anomaly value in mgals *ITEM VALUES FOR 'VALUE': *-21 to 13 (range) * *--------------------------------------------------------------- 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: Publications Service Center U.S. Geological Survey MS 902, Box 25046 DFC City: Denver State_or_Province: CO Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: (303)236-5486 Distribution_Liability: This database, identified as SIM-3033, 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. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE - ARC/INFO Export format SHP - ArcView Shapefile format Format_Version_Number: 8.1 File_Decompression_Technique: ZIP archive Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/sim/3033 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 Box 25286 City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Resource_Description: Scientific Investigations Map 3033 Distribution_Liability: This database, identified as SIM-3033, 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. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Standard_Order_Process: Non-digital_Form: Available as printed oversize map plate and pamphlet. Order from USGS at address above or see for more ordering information. Fees: For current prices see: Metadata_Reference_Information: Metadata_Date: 20080609 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-980 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