Geologic map datasets of the Custer and Gallatin National Forests of South-central Montana, in ARC/INFO format: Absaroka-Beartooth study area

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Frequently anticipated questions:


What does this data set describe?

Title:
Geologic map datasets of the Custer and Gallatin National Forests of South-central Montana, in ARC/INFO format: Absaroka-Beartooth study area
Abstract:
The digital ARC/INFO databases included in this directory provide a geologic map GIS database of the Absaroka-Beartooth study area (ABSA), a tract of approximately 1.4 million acres of National Forest land in southwestern Montana. The ABSA is adjacent to the northern part of Yellowstone National Park, and includes southeastern parts of Gallatin National Forest and western parts of the Custer National Forest. The geologic map was originally prepared to accompany a U.S. Geological Survey evaluation of the mineral resource potential within the ABSA. The results of this mineral resource assessment were published as U.S. Geological Survey Open-File Report 93-207 and the geologic map was plate 1 of this report. The enclosed ARC/INFO database was created directly from the base materials used to create the geologic map (plate 1) in the ABSA report.
  1. How might this data set be cited?
    Green, Gregory N., Bradley S. Van Gosen, Wilson, Anna B., and Silkwood, Jeffery T., 1999, Geologic map datasets of the Custer and Gallatin National Forests of South-central Montana, in ARC/INFO format: Absaroka-Beartooth study area: U.S. Geological Survey Open-File Report OFR 99-450, U.S. Geological Survey, Denver, Colorado.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -110.9
    East_Bounding_Coordinate: -109.15
    North_Bounding_Coordinate: 45.75
    South_Bounding_Coordinate: 44.9
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1999
    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?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 1
      Ordinates (y-coordinates) are specified to the nearest 1
      Planar coordinates are specified in Meters
      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.
  7. How does the data set describe geographic features?
    ABSAROKA.PAT
    geologic map units of the Absarokas and Beartooth study areas (Source: OFR-99-0450)
    NEW and NEW_LOW
    NEW: Corrected attribute from original (1993) map. NEW_LOW: Map unit symbol includes lower case letters. (Source: OFR-99-0450)
    ValueDefinition
    QsSurfical deposits (Quaternary)
    QtTravertine (Quaternary)
    QyLava Creek Tuff of Yellowstone Group (Pleistocene)
    QbBasalt (Pleistocene)
    TvAbsaroka Volcanic Supergroup (Eocene)
    TfFort Union Formation (Paleocene and Late Cretaceous)
    KalAndesite (Late Cretaceous
    KllLahards of Livingston Group (Late Cretaceous)
    KlcSedimentary rocks of Livingston Group (Late Cretaceous)
    KadAndesite (Late Cretaceous)
    KusSedimentary rocks (Late Cretaceous)
    KlsSedimentary rocks (Early Cretaceous)
    KuSedimentary rocks (Early and Late Cretaceous)
    JTRsSedimentary rocks (Jurassic and Triassic)
    PMsSedimentary rocks (Permian, Pensylvanian, and Mississippian)
    DOsSedimentary rocks (Devonian and Ordovician)
    OCsSedimentary rocks (Ordovician and Cambrian)
    CsSedimentary rocks (Cambrian)
    PzUndifferentiated sedimentary rocks (Paleozoic)
    TiIntermediate and felsic rocks (Eocene)
    TlpRhyolite porphyry of Lulu Pass (Eocene)
    TbhBreccian of Homestake mine area (Eocene)
    TbaBreccian of Alice E mine area (Eocene)
    ThmRhyolite Porphyry of Henderson Mountain (Eocene)
    ThRhyolite Porphyry of Homestake mine area (Eocene)
    TfmComplex of Fisher Mountain area (Eocene)
    TsbDiorite of Scotch Bonnet Mountain (Eocene)
    TaAndesite and trachyandesite porphyry (Eocene)
    TgrGranodiorite porphyry of Emigrant area (Eocene)
    TdpDacite porphyry (Eocene)
    TdiDiorite porphyry and basaltic andesite (Eocene)
    TmzMonzodiorite of Independence area (Eocene)
    TKiIntermediate and felsic intrusiverokcs (Tertiary or Late Cretaceous)
    KaAndesite (Late Cretaceous)
    KdDiorite and Sliderock Mountain (Late Cretaceous)
    KiRhyolite and quartz latite porphyry (Late Cretaceous)
    KglSyenite of Gose Lake (Late Cretaceous)
    dIntermediate and mafic intrusive rokcs (Eocene and Precambrian)
    miMafic intrusive rokcs (Archean and Proterozoic)
    AhdHornblende quartz diorite (Archean)
    AgrGranitic intrusive rocks (Archean)
    Asw7Stillwater Igneous Complex (Archean) Upper mixed, upper gabbro, and upper anorthosite zones.
    Asw6Stillwater Igneous Complex (Archean) Middle anorthosite zone.
    Asw5Stillwater Igneous Complex (Archean) Lower mixed, middle gabbro, and middle mixed zones.
    Asw4Stillwater Igneous Complex (Archean) Lower anorthosite zone.
    Asw3Stillwater Igneous Complex (Archean) Norite and lower gabbro zones.
    Asw2Stillwater Igneous Complex (Archean) Bronzitite zone
    Asw1Stillwater Igneous Complex (Archean) Peridotite zone
    AnMetanorite and metagabbro (Archean)
    AgnGranitic gneiss (Archean)
    AuUltramafic rocks (Archean)
    AsBiotite schist (Archean)
    AagAmphibolite and hornblende gneiss (Archean)
    AgaAmphibolite and gneiss (Archean)
    AncNappe core complex (Archean)
    AqaQuartzite and amphibolite (Archean)
    AshSchist and hornfels (Archean)
    ArnUndifferentiated metamorphic rocks (Archean)
    IGDS-LAYER.PAT
    Map unit symbol as found in original (1993) map. (same domains as the attribute NEW_LOW excpet all in upper case) (Source: OFR-99-0450)
    SYMBOL
    numerical value for geologic map units (Source: OFR-99-0450)
    Range of values
    Minimum:6
    Maximum:390
    ABSAROKA.AAT
    Contacts and faults in the Absaroka and Beartooth study areas (Source: OFR-99-0450)
    IGDS-LAYER and NEW
    IGDS-LAYER: contacts and faults as found in original (1993) map NEW: contacts and faults as found in this (1999) map (Source: OFR-99-0450)
    ValueDefinition
    contactknown contact between units
    detachmentdetachment fault
    Faultfault, certain
    Fault?fault, uncertain
    MI(unknown)
    thrustthrust fault, certain
    TI(unknown)
    Xfaultinferred thrust fault
    ABSAROKA.POINT
    Geologic map unit for individual samples (Source: OFR-99-0450)
    IGDS-LAYER, IDGS-LAYER_LOW, NEW, SYMBOL, and NEW_LOW
    same as ABSAROKA.PAT (Source: OFR-99-0450)
    DIKES.AAT
    Dikes represented by lines which should be polygons, but units too narrow to plot as polys at this scale. (Source: OFR-99-0450)
    IGDS-LAYER and SYMBOL
    same as ABSAROKA.PAT (Source: OFR-99-0450)
    FAULTS.AAT
    a line coverage of thrust and normal faults (Source: OFR-99-0450)
    IGDS-LAYER and NEW
    same as ABSAROKA.AAT (Source: OFR-99-0450)
    Entity_and_Attribute_Overview:
    ABSAROKA.AML:  ARCPLOT command that creates the geologic map of USGS
    Open-File Report 93-207, plate 1.
    ABSAROKA.E00:  ARC/INFO interchange file that can be used to create
    the database for plate 1 of USGS Open-File Report 93-207
    ABSAROKA.MET:  Metadata file
    ABSAROKA.PDF:  "Portable Document Format" file that can be viewed
    with the free software Adobe Acrobat Reader (must use version 4.0 or
    higher of Acrobat Reader due to the large size of the map).
    ABSAROKA.RTL:  A Hewlett Packard graphics plot file ("Raster
    Transfer Language") format
    COMMENTS.TXT:  Comments by Jeffrey T. Silkwood regarding this
    database in his letter accompanying transfer of the data to the USGS
    DIKES.E00:  ARC/INFO interchange file that can be used to create the
    dikes shown on the geologic map of USGS Open-File Report 93-207,
    plate 1
    FAULTS.E00:  ARC/INFO interchange file that can be used to create
    the faults shown on the geologic map of USGS Open-File Report
    93-207, plate 1
    FNT003.E00:  ARC/INFO interchange file that can be used to create
    the fonts labeling the map units on the geologic map of USGS
    Open-File Report 93-207, plate 1
    GEOL.KEY:  Text file providing a description of the map units
    GEOL_SYM.E00:  ARC/INFO interchange file that can be used to create
    the map symbols shown on the geologic map of USGS Open-File Report
    93-207, plate 1 (supplied by Jeffrey T. Silkwood)
    LOAD.AML:  ARCPLOT command that recreates the database structure of
    this directory
    MAPBAR.AML:  ARCPLOT command that creates the map-scale bar
    PROJECT.TXT:  Text file describing the projection applied to this
    database
    \SDTS:  ABSAROKA.EOO in SDTS (Spatial Data Transfer Standard)
    
    Entity_and_Attribute_Detail_Citation:
    More information can be found in the file readme.txt which can be downloaded with the digital database.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Gregory N. Green
    • Bradley S. Van Gosen
    • Anna B. Wilson
    • Jeffery T. Silkwood
  2. Who also contributed to the data set?
    Gregory N. Green, Anna B. Wilson, and Bradley S. Van Gosen of the U.S. Geological Survey and Jeffrey T. Silkwood of the USDA Forest Service
  3. To whom should users address questions about the data?
    Bradley S. Van Gosen
    U.S. Geological Survey
    geologist
    MS 905, USGS, Denver Federal Center
    Denver, CO
    USA

    (303) 236-1566 (voice)
    bvangose@usgs.gov

Why was the data set created?

This dataset was developed to provide a geologic map GIS database of the Custer and Gallatin National Forests in the Absaroka-Beartooth study area for use in spatial analysis by a variety of users.

How was the data set created?

  1. From what previous works were the data drawn?
    Mineral resources of the Absaroka-Beartooth study area, Hammarstrom and others, 1993 (source 1 of 1)
    Hammarstrom, J.M., Zientek, M.L., and Elliott, J.E. [editors], 1993, Mineral resource assessment of the Absaroka-Beartooth study area, Custer and Gallatin National Forests, Montana.: U.S. Geological Survey Open-File Report 93-207, U.S. Geological Survey, Denver, Colorado.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 126,720
    Source_Contribution: New and compiled geologic mapping
  2. How were the data generated, processed, and modified?
    Date: 1999 (process 1 of 2)
    The original base materials used to create plate 1 of USGS Open-File Report 93-207 were digitally scanned by Jeff Silkwood of the USDA Forest Service in Missoula, Montana. Mr. Silkwood then attributed the digital linework and polygons in ARC/INFO. The lines and polygons attributes were checked against the orginal and corrected to match the published paper map as neccessary. Shadeset and lineset attributes were added in ARC. This ARC database was further edited by Gregory Green to correct further minor deviations from the published map. The digital database was quality checked against original materials by Bradley Van Gosen.
    Date: 05-Oct-1999 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    U.S. Geological Survey
    Attn: Bradley S. Van Gosen
    MS 905, USGS, Denver Federal Center
    Denver, CO
    USA

    (303) 236-1566 (voice)
    bvangose@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?
    finished
  5. How consistent are the relationships among the observations, including topology?
    manual check against orginals

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:
This database is not meant to be used or displayed at any scale other than 1:126,720.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    Database Administrator
    MS 905, USGS, Denver Federal Center
    Denver, CO
    USA

    (303) 236-1566 (voice)
    bvangose@usgs.gov
  2. What's the catalog number I need to order this data set? USGS Open-File Report 99-450
  3. What legal disclaimers am I supposed to read?
    This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey (USGS) editorial standard nor with the North American stratigraphic codes. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the USGS. Although these data have been used by the USGS and have been successfully imported into data base programs, no warranty, expressed or implied, is made by the USGS as to how successfully or accurately the data can be imported into any specific application software running on any specific hardware platform. The fact of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. This data base GIS is not meant to be used or displayed at any scale other than 1:126,720.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 13-Jun-2016
Last Reviewed: 21-Jul-2000
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:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

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