Geologic map datasets of the Custer and Gallatin National Forests of South-central Montana, in ARC/INFO format: Pryor Mountains

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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: Pryor Mountains
Abstract:
The digital ARC/INFO databases included in this directory provide a geologic map GIS database of the Custer National Forest in the Pryor Mountains of south-central Montana. The geologic map area comprises approximately 122 square miles (316 square kilometers) of National Forest lands, located 40 miles (64 kilometers) south of Billings, Montana. This geologic map was originally prepared to accompany a U.S. Geological Survey evaluation of the mineral resource potential of the Custer National Forest in the Pryor Mountains. The results of this mineral resource assessment were published as U.S. Geological Survey Open-File Report 96-256. This ARC/INFO database was created from figure 2 (p. 4) of that 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: Pryor Mountains: U.S. Geological Survey Open-File Report 99-450, U.S. Geological Survey, Denver, Colorado.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -108.66
    East_Bounding_Coordinate: -108.3
    North_Bounding_Coordinate: 45.25
    South_Bounding_Coordinate: 45.0
  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?
    PRYOR.PAT
    Geologic map units (Source: OFR-99-0450)
    LABEL
    Geologic map unit symbol (Source: OFR-99-0450)
    ValueDefinition
    QsSurficial deposits (Quaternary)
    JPsJurassic, Triassic, and Permian sedimentary rocks--Includes Morrison Formation (Jurassic); Ellis Group (Jurassic) including the Swift, Rierdon, and Piper Formations; Chugwater Formation (Triassic); and Phosphoria Formation equivalents (Permian).
    &s (Ps)Pennsylvanian sedimentary rocks--Includes Tensleep Sandstone and Amsden Formation
    MmMadison Limestone Group (Mississippian)
    DsDevonian sedimentary rocks--Includes Jefferson Formation (Dolomite) and Beartooth Butte Formation.
    ObBighorn Dolomite (Ordovician)
    _s (Cs)Cambrian sedimentary rocks--Includes Gallatin Limestone, Gros Ventre Shale (Formation), and Flathead Quartzite
    p_r (pCr)Precambrian rocks--Includes granitic gneiss; hornblende schist; quartz veins; and aplite dikes
    EXPLANATION
    Short definition of every map unit (Source: OFR-99-0450)
    P1
    numerical representation of map units (Source: OFR-99-0450)
    Range of values
    Minimum:1
    Maximum:8
    CALCOMP1
    numerical representations of map units (Source: OFR-99-0450)
    Range of values
    Minimum:14
    Maximum:725
    PRYOR.AAT
    Linear map features (Source: OFR-99-0450)
    LABEL
    Definition of linear feature (Source: OFR-99-0450)
    ValueDefinition
    BOUNDRYmap boundary
    CONTACTObserved contact
    CONTACT_CONCEALEDContact that is concealed and its position inferred.
    FAULTObserved fault
    FAULT_CONCEALEDFault that is concealed and its position inferred.
    FAULT_INFERREDFault whose position is inferred
    FOLDS.AAT
    Folds, linear (Source: OFR-99-0450)
    LABEL
    explaination of linear fold features (Source: OFR-99-0450)
    ValueDefinition
    ANTICLINEObserved anticlinal fold axis
    ANITCLINE_APPROXIMATInferred approximate location of fold
    SYNCLINEObserved synclinal fold axis
    Entity_and_Attribute_Overview:
    Pryor Data files:
    DECO.E00:  ARC/INFO interchange file that can be used to create the
    decorations on the line work shown on the geologic map of USGS
    Open-File Report 96-256, figure 2 (p. 4).
    FNT003.E00:  ARC/INFO interchange file that can be used to create
    the fonts labeling the map units shown on the geologic map of USGS
    Open-File Report 96-256, figure 2 (p. 4).
    FOLDS.E00:  ARC/INFO interchange file that can be used to create the
    fold axes shown on the geologic map of USGS Open-File Report 96-256,
    figure 2 (p. 4).
    GEOL.KEY:  Text file providing a description of the map units
    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
    PRYOR.AML:  ARCPLOT command that creates the geologic map of USGS
    Open-File Report 96-256, figure 2 (p. 4).
    PRYOR.BOX:  Text file for the map legend in the description of map
    units shown on the geologic map of USGS Open-File Report 96-256,
    figure 2 (p. 4).
    PRYOR.E00:  ARC/INFO interchange file that can be used to create the
    database for figure 2 (p. 4) of USGS Open-File Report 96-256.
    PRYOR.MET:  Metadata file
    PRYOR.PDF:  "Portable Document Format" file that can be viewed with
    the free software Adobe Acrobat Reader
    PRYOR.RTL:  A Hewlett Packard graphics plot file ("Raster Transfer
    Language") format
    PRY_TIC.E00:  ARC/INFO interchange file that can be used to create
    the latitude-longitude tic marks shown on the geologic map of USGS
    Open-File Report 96-256, figure 2 (p. 4). \SDTS:  PRYOR.EOO in SDTS
    (Spatial Data Transfer Standard)
    
    Entity_and_Attribute_Detail_Citation: For more information see the file readme.txt.

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 National Forest in the Pryor Mountains 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 Pryor Mountains, Van Gosen and others, 1996 (source 1 of 1)
    Van Gosen, B.S., Wilson, A.B., Hammarstrom, J.M., and Kulik, D.M., 1996, Mineral Resource Assessment of the Custer National Forest in the Pryor Mountains, Carbon County, South-Central Montana.: U.S. Geological Survey Open-File Report 96-256, U.S. Geological Survey, Denver, Colorado.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 126720
    Source_Contribution: New and compiled geologic mapping
  2. How were the data generated, processed, and modified?
    Date: 1999 (process 1 of 2)
    The original digital GSMAP data files that were used to create the open-file map were transfered to ARC via the GENERATE/UNGENERATE tool. The lines and polygons attributes were checked against the orginal and corrected to match the published map as neccessary. Shadeset and lineset attributes were added in ARC. This work was done by Green. The digital database was quality checked against original materials by Van Gosen.
    Date: 28-Apr-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: 14-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)

This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/99-450/pryor.faq.html>
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