Digital geologic map of the Springdale 7.5' quadrangle, Nevada

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Frequently anticipated questions:

What does this data set describe?

Title: Digital geologic map of the Springdale 7.5' quadrangle, Nevada
Mapped surficial units of the Springdale Quadrangle, Nye County, Nevada
  1. How might this data set be cited?
    Minor, Scott, 1996, Digital geologic map of the Springdale 7.5' quadrangle, Nevada: U.S. Geological Survey Open-File Report 97-0093, U.S. Geological Survey, Denver, Colorado.

    Online Links:

    Other_Citation_Details: Files in ARC/INFO export and ASCII formats (12MB).
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -116.875
    East_Bounding_Coordinate: -116.750
    North_Bounding_Coordinate: 37.125
    South_Bounding_Coordinate: 37.000
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1997
    publication date
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: map
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a vector data set.
    2. What coordinate system is used to represent geographic features?
  7. How does the data set describe geographic features?
    Description of faults in mapped area (Source: OFR-97-0093)
    Line type (Source: OFR-97-0093)
    unddisplacement unspecified
    Lbbnormal fault; down-to-left (with respect to origin of digital fault line) apparent offset
    Rbbnormal fault; down-to-right apparent offset
    Lbxgravity-slide surface; slide block / breccia sheet on left side
    Rbxgravity-slide surface; slide block / breccia sheet on right side
    Rssstrike-slip fault; right-lateral sense of movement
    Lssstrike-slip fault; left-lateral sense of movement
    Lrooblique-slip fault; down-to-left / right-lateral sense of movement
    Llooblique-slip fault; down-to-left / left-lateral sense of movement
    Rrooblique-slip fault; down-to-right / right-lateral sense of movement
    Rlooblique-slip fault; down-to-right / left-lateral sense of movement
    Geologic map units (Source: OFR-97-0093)
    Polygon name (Source: OFR-97-0093)
    QayYoung alluvium (Holocene and late Pleistocene)
    QTcColluvium (Quaternary and Pliocene)
    QTlsLandslide deposits (Quaternary and Pliocene)
    QamMiddle alluvium (middle Pleistocene)
    QeEolian deposits (middle Pleistocene)
    QTaOld alluvium (early Pleistocene and Pliocene?)
    TgpPediment gravel (Pliocene?)
    TgoGravel of Oasis Valley (Pliocene and Miocene)
    TspSpearhead Member of Stonewall Flat Tuff (Miocene)
    TysAndesite of Sarcobatus Flat (Miocene)
    TfntAsh-flow tuff - Rhyolitic complex of Springdale Mountain (Miocene)
    TfnuUpper lava - Rhyolitic complex of Springdale Mountain (Miocene)
    TfnvVitrophyre - Rhyolitic complex of Springdale Mountain (Miocene)
    TfnpPlaty volcanic dome - Rhyolitic complex of Springdale Mountain (Miocene)
    TfnlLower lava - Rhyolitic complex of Springdale Mountain (Miocene)
    TfnbTuffaceous sedimentary breccia - Rhyolitic complex of Springdale Mountain (Miocene)
    TfnyTrachyte of Donovan Mountain (Miocene)
    TfndTrachyte dikes (Miocene)
    TfusBedded tuffs and volcaniclastic sedimentary rocks (Miocene)
    TfruUpper rhyolite lava - Rhyolite of Rainbow Mountain (Miocene)
    TfrtAsh-flow tuff - Rhyolite of Rainbow Mountain (Miocene)
    TfrlLower intrusion - Rhyolite of Rainbow Mountain (Miocene)
    TfrsBedded tuff - Rhyolite of Rainbow Mountain (Miocene)
    TgxSedimentary breccia (Miocene)
    Tff(bx), Tma(bx), Tmr(bx), Tpc(bx), Tcb(bx), Cc(bx), Cz(bx), CZw(bx)Gravity-slide breccia (Miocene)
    TffRhyolite of Fleur-de-lis Ranch (Miocene)
    TmaAmmonia Tanks Tuff - Timber Mountain Group (Miocene)
    TmrRainier Mesa Tuff - Timber Mountain Group (Miocene)
    TpcTiva Canyon Tuff - Paintbrush Group (Miocene)
    TcbBullfrog Tuff - Crater Flat Group (Miocene)
    TrpIntermediate lava (Miocene)
    TrrDacite of Picture Rock (Miocene)
    TqRhyolite of Quartz Mountain (Miocene)
    TgtQuartzite conglomerate (Oligocene)
    CcCarrara Formation (Middle and Early Cambrian)
    CzZabriskie Quartzite (Lower Cambrian)
    CZwWood Canyon Formation (Lower Cambrian and Late Proterozoic)
    Geologic map units at specific locations (same attributes as polygon coverage POLYGONS.PAT) (Source: OFR-97-0093)
    Orientation of structural features (Source: OFR-97-0093)
    Dip of structural feature (Source: OFR-97-0093)
    Range of values
    Azimuth of structural feature (Source: OFR-97-0093)
    Range of values
    Structure type (Source: OFR-97-0093)
    BEDinclined bedding
    FOLinclined foliation
    FLHHorizontal foliation
    FLTFault plane
    SKSSlickenside striation
    Topographic base map (Source: OFR-97-0093)
    OFR-97-0093 (Source: OFR-97-0093)
    idxindex contour line
    regregular contour line

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Scott Minor
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Minor, Scott A
    Mail Stop 913, USGS
    Box 25046, Denver Federal Center
    Denver, CO

    303-236-0303 (voice)

Why was the data set created?

To provide to the public a digital geologic map database of the Springdale Quadrangle, Nye County, Nevada

How was the data set created?

  1. From what previous works were the data drawn?
    Minor and others (1993) (source 1 of 2)
    Minor, S.A., Sawyer, D.A., Wahl, R.R., Frizzell, V.A., Jr., Schilling, S.P., Warren, R.G., Orkild, P.P., Coe, J.A., Hudson, M.R., Fleck, R.J., Lanphere, M.A., Swadley, W C, and Cole, J.C., 1993, Preliminary geologic map of the Pahute Mesa 30' x 60' quadrangle, Nevada: U.S. Geological Survey Open-File Report 93-0299.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 100000
    Source_Contribution: New geologic mapping
    Warren and others (1997) (source 2 of 2)
    Warren, R.G., Sawyer, D.A., Byers F.M., Jr, and Cole, G.L., 1997, A petrographic/geochemical database and stratigraphic and structural framework for the southwestern Nevada volcanic field: Los Alamos National Laboratory Report LA-xxxx-MS.

    Type_of_Source_Media: paper
    New detailed petrographic and geochemical data of Tertiary volcanic units of the southwest Nevada volcanic field obtained by R.G. Warren.
  2. How were the data generated, processed, and modified?
    Date: 1963 (process 1 of 2)
    The current map database incorporates geologic data from: (1) early preliminary geologic mapping (1963-1965) by P.P. Orkild (assisted by R.L. Christiansen); (2) more recent field mapping (1991-1995) of bedrock by S.A. Minor; (3) recent mapping (1994- 1995) of surficial deposits by WC Swadley; and (4) new detailed petrographic and geochemical data of Tertiary volcanic units of the southwest Nevada volcanic field obtained by R.G. Warren (Warren and others, 1997). Hand-drafted stable-base layers of the early mapping were scanned and vectorized and then edited using AutoCAD software. New geologic field data, which were mapped on 1:24,000-scale (bedrock) and 1:60,000- scale (surficial deposits) aerial photographs, were digitized directly from the photographs using a Kern PG-2 stereographic plotter interfaced with CADMAP digital capturing software. Also, clear-film positives of the topographic base map layers were scanned. All new digital files as well as the earlier AutoCAD map files were imported into the raster processing software LT4X for initial cleaning, editing and, in the case of scan files, vectorization. The new map data were also imported into AutoCAD for further editing. Geographic Resource Analysis Support System (GRASS), a public-domain GIS, was used to transform all of the new component map files to Universal Transverse Mercator projections, merge the files in the appropriate composite map-data layers, conduct final editing and modification of map elements, build and tag polygons, and assign attributes to map elements. Finally, the various data layers were converted to ArcINFO coverages and a plot file of the final geologic map was generated from them.
    Date: 14-Aug-2000 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    Jennifer Lenz
    US Geological Survey
    12201 Surise Valley Drive, Mail Stop 918
    Reston, VA

    703-648-6974 (voice)
    703-648-6560 (FAX)
  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the observations, including topology?
    All mapping was conducted by geologists who each have many years experience working in the map region in a variety of geologic environments, and who have each produced several published geologic maps.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: none
Use_Constraints: none
  1. Who distributes the data set? (Distributor 1 of 1)
    USGS Information Services
    Box 25286, Denver Federal Center
    Denver, Colorado

    1-888-ASK-USGS (voice)
    1-303-202-4695 (FAX)
  2. What's the catalog number I need to order this data set? US Geological Survey Open-File Report 97-0093
  3. What legal disclaimers am I supposed to read?
    This map 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.
  4. How can I download or order the data?
    • Availability in digital form:
      Data format:
      ARC/INFO export files	Description of coverage
      base.e00               Base map
      faults.e00             Geologic faults
      polygons.e00           Geologic map units
      structatts.e00         Structural attributes
      topo.e00               Topographic base map
      in format ARCE (version ARC/INFO version 7.x) Size: 12
      Network links:
    • Cost to order the data: none

Who wrote the metadata?

Last modified: 13-Jun-2016
Metadata author:
Peter N Schweitzer
USGS Midwest Area
Collection manager, USGS Geoscience Data Clearinghouse,
Mail Stop 954
12201 Sunrise Valley Dr
Reston, VA

703-648-6533 (voice)
703-648-6252 (FAX)
Metadata standard:
Content for Digital Geospatial Metadata (FGDC-STD-001-1998)

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