Digital map showing faults, lineaments, and earthquake epicenters in the Pahute Mesa 30' x 60' quadrangle, Nevada, in Arc/Info ASCII generate and Arc/Info export formats

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Frequently anticipated questions:


What does this data set describe?

Title:
Digital map showing faults, lineaments, and earthquake epicenters in the Pahute Mesa 30' x 60' quadrangle, Nevada, in Arc/Info ASCII generate and Arc/Info export formats
Abstract:
This digital map compilation incorporates fault, air photo lineament, and earthquake epicenter data from within the Pahute Mesa 30' by 60' quadrangle, southern Nye County, Nevada (fig. 1). The compilation contributes to the U.S. Department of Energy's Yucca Mountain Project, established to determine whether or not the Yucca Mountain Site is suitable for the disposal of high-level nuclear waste. Studies of local and regional faulting and earthquake activity, including the features depicted on the accompanying map, are carried out to help characterize seismic hazard and tectonic processes that may be relevant to the future stability of Yucca Mountain. The Yucca Mountain site lies in the central part of the Beatty 30' by 60' quadrangle and is centered approximately 15 km south of the south edge of the Pahute Mesa quadrangle.
  1. How might this data set be cited?
    Minor, Scott, and Wahl, Ronald, 1996, Digital map showing faults, lineaments, and earthquake epicenters in the Pahute Mesa 30' x 60' quadrangle, Nevada, in Arc/Info ASCII generate and Arc/Info export formats: U.S. Geological Survey Open-File Report 96-262, U.S. Geological Survey, Denver, Colorado.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -117.0
    East_Bounding_Coordinate: -116.0
    North_Bounding_Coordinate: 37.5
    South_Bounding_Coordinate: 37.0
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1996
    Currentness_Reference:
    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?
    CALDERAS.AAT
    Caldera boundaries (Source: OFR-96-0262)
    LINE_TYP
    Line type (Source: OFR-96-0262)
    ValueDefinition
    hrlcaldera topographic wall; basin to left
    hrrcaldera topographic wall; basin to right
    undcaldera structural margin
    FAULTS.AAT
    Location of faults (Source: OFR-96-0262)
    LINE_TYP
    Line type (Source: OFR-96-0262)
    ValueDefinition
    Lbbnormal fault; down-to-left apparent offset
    Rbbnormal fault; down-to-right apparent offset
    LloOblique-slip fault; down-to-left / left-lateral sense of movement
    Rlooblique-slip fault; down-to-right / left-lateral sense of movement
    Rrooblique-slip fault; down-to-right / right-lateral sense of movement
    Lssstrike-slip fault; left-lateral sense of movement
    Rssstrike-slip fault; right-lateral sense of movement
    Lbxlow-angle (< 30 deg. dip) fault; upper plate on left side
    Rbxlow-angle fault; upper plate on right side
    Lstthrust fault; upper plate on left side
    Rstthrust fault; upper plate on right side
    LhrTertiary(?) landslide slip-surface trace; slide block on left side
    RhrTertiary(?) landslide slip-surface trace; slide block on right side
    unddisplacement unspecified
    LINEAMENTS.AAT
    Location of lineaments (Source: OFR-96-0262)
    LINE_TYP
    Line type (Source: OFR-96-0262)
    ValueDefinition
    Blblineament in bedrock; associated left-facing geomorphic scarp
    Brblineament in bedrock; associated right-facing geomorphic scarp
    Bunlineament in bedrock; existence or facing direction of associated geomorphic scarp unknown
    Qlblineament in Quaternary deposit; associated left-facing geomorphic scarp
    Qrblineament in Quaternary deposit; associated right-facing geomorphic scarp
    Qunlineament in Quaternary deposit; existence or facing direction of associated geomorphic scarp unknown
    SEIS78.AAT
    Location of Southern Great Basin Seismic Network (SGBSN) seismograph stations derived from the post-7/78 SGBSN catalog. (Source: OFR-96-0262)
    DEPTH
    Hypocenter depth (Source: OFR-96-0262)
    Range of values
    Minimum:-2.00
    Maximum:54.44
    Units:Kilometers
    Resolution:.01
    MAGNITUDE
    Earthquake magnitude (Source: OFR-96-0262)
    Range of values
    Minimum:0.00
    Maximum:4.00
    Units:local magnitudes (ML)
    Resolution:.01
    SIESHS.AAT
    Location of Southern Great Basin Seismic Network (SGBSN) seismograph stations derived from the historical Meremonte and Rogers (1987). (Source: OFR-96-0262)
    DEPTH
    Hypocenter depth (Source: OFR-96-0262)
    Range of values
    Minimum:0.00
    Maximum:34.50
    Units:Kilometers
    Resolution:.01
    MAGNITUDE
    Earthquake magnitude (Source: OFR-96-0262)
    Range of values
    Minimum:0.00
    Maximum:5.70
    Units:local magnitudes (ML)
    Resolution:0.1

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Scott Minor
    • Ronald Wahl
  2. Who also contributed to the data set?
    D.S. Aitken, S.C. Harmsen, Paia Levine, T.M. McCulloch, D.A. Ponce and J.C. Shulters provided invaluable computer and other technical assistance in compiling an earlier preliminary version of this map. H.R. Covington generously provided unpublished fault data and identified faults that have moved in response to recent nuclear weapons testing. M.C. Reheis and K.M. Haller kindly supplied stable-base copies of their published lineament and fault map data, respectively, which allowed for hand digitization of the data by M.F. Duncan. David Vonseggern (Univ. of Nevada, Reno) provided invaluable digital catalogs of historical and SGBSN earthquake events. This compilation benefited significantly from discussions with H.R. Covington, S.C. Harmsen, M.E. Meremonte and P.P. Orkild. We gratefully acknowledge improvements to the map resulting from critical reviews by R.E. Anderson, C.G. Bufe, H.R. Covington, D.W. O Leary, and M.W. Reynolds.
  3. To whom should users address questions about the data?
    Minor, Scott A
    USGS-GEO-CRG-ESP
    Mail Stop 913, USGS
    Box 25046, Denver Federal Center
    Denver, CO
    US

    303-236-0303 (voice)
    sminor@usgs.gov

Why was the data set created?

To provide to the public a digital geologic map database of the faults, lineaments, and earthquake epicenters of the Pahute Mesa 30' X 60' quadrangle, Nevada

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: unknown (process 1 of 2)
    Details and significance of fault, lineament, and seismicity data used in the current compilation are described in following sections. Each type of data was digitized differently: (1) most fault data were imported from previous 1:100,000-scale digital geologic compilations covering the Pahute Mesa quadrangle (Minor and others, 1993; Sawyer and others, 1995); (2) a few supplemental (newly acquired) fault lines were hand digitized within the GIS program indicated below; (3) selected lineaments originally mapped by Reheis (1992) were hand digitized using GSMAP (Selner and Taylor, 1993); and (4) seismicity data point coordinates were read directly from ASCII tables modified from reported seismicity catalogs (Meremonte and Rogers, 1987; D. Vonseggern, Univ. of Nevada, Reno, digital commun., 1995). A non-edited digital base map of the Pahute Mesa 30’ x 60 quadrangle, which is included with the data files, was obtained by scanning and vectorizing a stable-base copy of the published U.S. Geological Survey 1:100,000-scale base map. Geographic Resource Analysis Support System (GRASS), a public domain GIS developed by the U.S. Army Corps of Engineers, was used to transform all new component data to Universal Transverse Mercator projections, merge data in the appropriate map layers, hand digitize supplemental line data, conduct final editing and modification of map elements, and assign attributes to map line elements. Finally, GRASS was used to convert the data layers to ARC/INFO ASCII and export files.
    Date: 16-Aug-2000 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    Jennifer Lenz
    U.S. Geological Survey
    12201 Surise Valley Drive, Mail Stop 918
    Reston, VA
    USA

    703-648-6974 (voice)
    703-648-6560 (FAX)
    pschweitzer@usgs.gov
  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?
    Complete
  5. How consistent are the relationships among the observations, including topology?
    Most of the faults shown on this map are depicted on the previously released, 1:100,000- scale digital geologic compilations of the Pahute Mesa quadrangle (Minor and others, 1993) and the Nevada Test Site (NTS) area (Sawyer and others, 1995).
    Lineaments shown on this compilation were initially mapped by Reheis (1992) at a scale of 1:100,000 from aerial photographs to help identify and characterize potentially active faults near Yucca Mountain.
    This compilation shows epicenters for earthquakes occurring in the Pahute Mesa 30' by 60' quadrangle from 1868 through December, 1994. Seismicity data for the period 1868 to August 1978 were derived from a historical catalog of southern Great Basin earthquakes compiled by Meremonte and Rogers (1987).

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
    USA

    1-888-ASK-USGS (voice)
    1-303-202-4695 (FAX)
    infoservices@usgs.gov
  2. What's the catalog number I need to order this data set? US Geological Survey Open-File Report 96-0262
  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?

Who wrote the metadata?

Dates:
Last modified: 05-Feb-2016
Metadata author:
Peter N Schweitzer
USGS Midwest Area
Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/
Mail Stop 954
12201 Sunrise Valley Dr
Reston, VA
USA

703-648-6533 (voice)
703-648-6252 (FAX)
pschweitzer@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/96-262/metadata.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:06:42 2018