Metadata:
  Identification_Information:
    Citation:
      Citation_Information:
        Originator: USGS; Eastern Energy Team; John Tully (comp.)
        Publication_Date: 200108
        Title: Coal Fields of the United States
        Publication_Information:
          Publication_Place: Reston, VA
          Publisher: National Atlas of the United States
        Online_Linkage: <http://nationalatlas.gov/atlasftp.html?openChapters=chpgeol#chpgeol>
    Description:
      Abstract:
        This map layer shows the coal fields of Alaska and the conterminous United
        States.  Most of the material for the conterminous United States was
        collected from James Trumbull's "Coal Fields of the United States,
        Conterminous United States" map (sheet 1, 1960).  The Gulf Coast region
        was updated using generalized, coal-bearing geology obtained from State
        geologic maps.  The Alaska coal fields were collected from Farrell
        Barnes's "Coal Fields of the United States, Alaska" map (sheet 2, 1961).
      Purpose:
        These data are intended for geographic display and analysis at the
        National level, and for large regional areas.  The data should be
        displayed and analyzed at scales appropriate for 1:5,000,000-scale data.
        No responsibility is assumed by the U.S. Geological Survey or the National
        Atlas of the United States in the use of these data.
    Time_Period_of_Content:
      Time_Period_Information:
        Single_Date/Time:
          Calendar_Date: 200108
      Currentness_Reference: Publication date
    Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: None planned
    Spatial_Domain:
      Bounding_Coordinates:
        West_Bounding_Coordinate: -176.000
        East_Bounding_Coordinate: -66.000
        North_Bounding_Coordinate: 70.981
        South_Bounding_Coordinate: 26.000
    Keywords:
      Theme:
        Theme_Keyword_Thesaurus: ISO 19115 Topic Category
        Theme_Keyword: geoscientificInformation
      Theme:
        Theme_Keyword_Thesaurus: None
        Theme_Keyword: Coal fields
        Theme_Keyword: Eastern Energy Team
        Theme_Keyword: Energy
        Theme_Keyword: Power
        Theme_Keyword: Coal
        Theme_Keyword: Resources
      Place:
        Place_Keyword_Thesaurus: Geographic Names Information System
        Place_Keyword: United States
        Place_Keyword: Alabama
        Place_Keyword: Alaska
        Place_Keyword: Arizona
        Place_Keyword: Arkansas
        Place_Keyword: California
        Place_Keyword: Colorado
        Place_Keyword: Connecticut
        Place_Keyword: Delaware
        Place_Keyword: District of Columbia
        Place_Keyword: Florida
        Place_Keyword: Georgia
        Place_Keyword: Indiana
        Place_Keyword: Illinois
        Place_Keyword: Idaho
        Place_Keyword: Iowa
        Place_Keyword: Kansas
        Place_Keyword: Kentucky
        Place_Keyword: Louisiana
        Place_Keyword: Maine
        Place_Keyword: Maryland
        Place_Keyword: Massachusetts
        Place_Keyword: Michigan
        Place_Keyword: Minnesota
        Place_Keyword: Mississippi
        Place_Keyword: Missouri
        Place_Keyword: Montana
        Place_Keyword: Nebraska
        Place_Keyword: Nevada
        Place_Keyword: New Hampshire
        Place_Keyword: New Jersey
        Place_Keyword: New Mexico
        Place_Keyword: New York
        Place_Keyword: North Carolina
        Place_Keyword: North Dakota
        Place_Keyword: Ohio
        Place_Keyword: Oklahoma
        Place_Keyword: Oregon
        Place_Keyword: Pennsylvania
        Place_Keyword: Rhode Island
        Place_Keyword: South Carolina
        Place_Keyword: South Dakota
        Place_Keyword: Tennessee
        Place_Keyword: Texas
        Place_Keyword: Utah
        Place_Keyword: Vermont
        Place_Keyword: Virginia
        Place_Keyword: Washington
        Place_Keyword: West Virginia
        Place_Keyword: Wisconsin
        Place_Keyword: Wyoming
        Place_Keyword: Appalachians
        Place_Keyword: Gulf Coast
        Place_Keyword: Northern Great Plains
        Place_Keyword: Rocky Mountains
        Place_Keyword: Midwest
      Stratum:
        Stratum_Keyword_Thesaurus:
          Geologic Names Unit Lexicon (GNULEX), 1996; Stratigraphic Nomenclature
          Databases for the United States, Its Possessions, and Territories; U.S.
          Geological Survey Digital Data Series DDS-6, release 3.
        Stratum_Keyword: Lignite
        Stratum_Keyword: Subbituminous
        Stratum_Keyword: Bituminous
        Stratum_Keyword: Anthracite
        Stratum_Keyword: Semianthracite
        Stratum_Keyword: Meta-anthracite

    Access_Constraints: None
    Use_Constraints:
      None.  Acknowledgement of the National Atlas of the United States of America
      would be appreciated in products derived from these data.
    Point_of_Contact:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Susan J. Tewalt
        Contact_Address:
          Address_Type: Mailing address
          Address: 956 National Center
          City: Reston
          State_or_Province: Virginia
          Postal_Code: 20192
          Country: USA
        Contact_Voice_Telephone: 703-648-6437
    Browse_Graphic:
      Browse_Graphic_File_Name: <http://pubs.usgs.gov/of/1996/of96-092/Comp/main.gif>
      Browse_Graphic_File_Description:
        This is a simplified GIF image of the coal fields in the conterminous
        United States.
      Browse_Graphic_File_Type: GIF
  Data_Quality_Information:
    Logical_Consistency_Report:
      Topology for this map layer was built using the CLEAN command within
      Arc/INFO.  This command eliminates dangling nodes, calculates intersections
      of arcs, eliminates redundant arcs, and creates a polygon attribute table.
    Completeness_Report:
      This map layer is a representation of the coal fields in the conterminous
      United States and Alaska.  There are no coal fields in Hawaii.
    Lineage:
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Campbell, M.R.
            Publication_Date: 1908
            Title: Coal Fields of the United States
            Publication_Information:
              Publication_Place: Washington, DC
              Publisher: U.S. Geological Survey
        Source_Scale_Denominator: 7500000
        Type_of_Source_Media: Paper
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 1908
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: CF1908
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Averitt, P.
            Publication_Date: 1942
            Title: Coal Fields of the United States
            Publication_Information:
              Publication_Place: Washington, DC
              Publisher: U.S. Geological Survey
        Source_Scale_Denominator: 2500000
        Type_of_Source_Media: Paper
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 1942
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: CF1942
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Trumbull, J.
            Publication_Date: 1960
            Title: Coal Fields of the United States, sheet 1
            Publication_Information:
              Publication_Place: Washington, DC
              Publisher: U.S. Geological Survey
        Source_Scale_Denominator: 5000000
        Type_of_Source_Media: Paper
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 1960
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: CF1960
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Barnes, F.F.
            Publication_Date: 1961
            Title: Coal Fields of the United States, sheet 2
            Publication_Information:
              Publication_Place: Washington, DC
              Publisher: U.S. Geological Survey
        Source_Scale_Denominator: 5000000
        Type_of_Source_Media: Paper
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 1961
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: CF1961
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Wood, Jr., G.H.
            Originator: Bour, III, W.V.
            Publication_Date: 1988
            Title: Coal Map of North America, south sheet
            Publication_Information:
              Publication_Place: Reston, VA
              Publisher: U.S. Geological Survey
        Source_Scale_Denominator: 5000000
        Type_of_Source_Media: Paper
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 1988
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: Coal88
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Missouri Geological Survey
            Publication_Date: 1979
            Title: Geologic Map of Missouri
        Source_Scale_Denominator: 500000
        Type_of_Source_Media: Paper
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 1979
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: Missouri
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Mississippi Geological Society
            Originator: U.S. Geological Survey
            Publication_Date: 1945
            Title: Geologic Map of Mississippi
        Source_Scale_Denominator: 500000
        Type_of_Source_Media: Paper
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 1945
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: Mississippi
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Louisiana Geological Survey
            Publication_Date: 1984
            Title: Geologic Map of Louisiana
        Source_Scale_Denominator: 500000
        Type_of_Source_Media: Paper
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 1984
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: Louisiana
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Arkansas Geological Commission
            Originator: U.S. Geological Survey
            Publication_Date: 1976
            Title: Geologic Map of Arkansas
        Source_Scale_Denominator: 500000
        Type_of_Source_Media: Paper
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 1976
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: Arkansas
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Texas Bureau of Economic Geology
            Publication_Date: 1992
            Title: Geologic Map of Texas
        Source_Scale_Denominator: 500000
        Type_of_Source_Media: Paper
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 1992
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: Texas
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Georgia Department of Natural Resources
            Originator: Georgia Geological Survey
            Publication_Date: 1975
            Title: Geologic Map of Georgia
        Source_Scale_Denominator: 500000
        Type_of_Source_Media: Paper
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 1976
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: Georgia
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:


          Citation_Information:
            Originator: Kentucky Geological Survey
            Originator: U.S. Geological Survey
            Publication_Date: 1981
            Title: Geologic Map of Kentucky
        Source_Scale_Denominator: 250000
        Type_of_Source_Media: Paper
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 1981
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: Kentucky
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Tennessee Department of Conservation, Division of Geology
            Publication_Date: 1966
            Title: Geologic Map of Tennessee
        Source_Scale_Denominator: 250000
        Type_of_Source_Media: Paper
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 1966
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: Tennessee
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Geological Survey of Alabama
            Publication_Date: 1989
            Title: Geologic Map of Alabama
        Source_Scale_Denominator: 500000
        Type_of_Source_Media: Paper
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 1989
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: Alabama
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: U.S. Geological Survey
            Publication_Date: 1995
            Title: Coal Fields Data Set
            Publication_Information:
              Publication_Place: Reston, VA
              Publisher: U.S. Geological Survey
        Source_Scale_Denominator: 5000000
        Type_of_Source_Media: Online
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Range_of_Dates/Times:
              Beginning_Date: 1908
              Ending_Date: 1992
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: CFALL
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: U.S. Geological Survey
            Publication_Date: 2001
            Title: Coal Fields Data Set
            Publication_Information:
              Publication_Place: Reston, VA
              Publisher: U.S. Geological Survey
        Source_Scale_Denominator: 5000000
        Type_of_Source_Media: Online
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Range_of_Dates/Times:
              Beginning_Date: 1908
              Ending_Date: 2000
          Source_Currentness_Reference: Ground condition
        Source_Citation_Abbreviation: CFNEW
        Source_Contribution: Spatial and attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Intertec Publishing Corporation
            Publication_Date: 2000
            Title: Keystone Coal Industry Manual
            Publication_Information:
              Publication_Place: Chicago, Illinois
              Publisher: Intertec Publishing Corporation
        Type_of_Source_Media: Book
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 2000
          Source_Currentness_Reference: Publication date
        Source_Citation_Abbreviation: KEYSTONE
        Source_Contribution: Attribute information
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: National Atlas of the United States
            Publication_Date: 1999
            Title: Hydrography Features of the United States
            Publication_Information:
              Publication_Place: Reston, VA
              Publisher: National Atlas of the United States
        Source_Scale_Denominator: 2000000
        Type_of_Source_Media: Online
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Range_of_Dates/Times:
              Beginning_Date: 1995
              Ending_Date: 1999
          Source_Currentness_Reference: Ground condition
        Source_Citation_Abbreviation: ATLASHY
        Source_Contribution: Spatial and attribute information
      Process_Step:
        Process_Description:
          All the paper maps were manually digitized on a tablet using Arc/INFO.
          All data were then appended into one data set.  This data set was edited
          to resolve inconsistencies between maps and to form a polygon coverage.
          The final data set was then attributed using the coaltype codes
          described within this document.
        Source_Used_Citation_Abbreviation: CF1908
        Source_Used_Citation_Abbreviation: CF1942
        Source_Used_Citation_Abbreviation: CF1960
        Source_Used_Citation_Abbreviation: CF1961
        Source_Used_Citation_Abbreviation: Coal88
        Source_Used_Citation_Abbreviation: Missouri
        Source_Used_Citation_Abbreviation: Mississippi
        Source_Used_Citation_Abbreviation: Louisiana
        Source_Used_Citation_Abbreviation: Arkansas
        Source_Used_Citation_Abbreviation: Texas
        Source_Used_Citation_Abbreviation: Georgia
        Source_Used_Citation_Abbreviation: Kentucky
        Source_Used_Citation_Abbreviation: Tennessee
        Source_Used_Citation_Abbreviation: Alabama
        Process_Date: 1995
        Source_Produced_Citation_Abbreviation: CFALL
      Process_Step:
        Process_Description:
          Some arcs in Alaska, Florida, Michigan, Oregon, Rhode Island, Texas, and
          Washington were adjusted to align with the National Atlas shoreline.
        Source_Used_Citation_Abbreviation: CFALL
        Source_Used_Citation_Abbreviation: ATLASHY
        Process_Date: 2001
        Source_Produced_Citation_Abbreviation: CFNEW
      Process_Step:
        Process_Description:
          Coal province and coal field/region name attributes were added to
          polygons based on the CF1960 and CF1961 maps.  One additional name was
          obtained from State coal field summaries in KEYSTONE.
        Source_Used_Citation_Abbreviation: CF1960
        Source_Used_Citation_Abbreviation: CF1961
        Source_Used_Citation_Abbreviation: KEYSTONE
        Source_Used_Citation_Abbreviation: CFNEW
        Process_Date: 2001
      Process_Step:
        Process_Description: The polygon coverage was converted to a shapefile.
        Process_Date: 2001

  Spatial_Reference_Information:
    Horizontal_Coordinate_System_Definition:
      Geographic:
        Latitude_Resolution: 0.001
        Longitude_Resolution: 0.001
        Geographic_Coordinate_Units: Decimal degrees
      Geodetic_Model:
        Horizontal_Datum_Name: North American Datum of 1983
        Ellipsoid_Name: GRS1980
        Semi-major_Axis: 6378137.0
        Denominator_of_Flattening_Ratio: 298.257222

  Entity_and_Attribute_Information:
    Detailed_Description:
      Entity_Type:
        Entity_Type_Label: Coal fields (described by coalfdp050.dbf)
        Entity_Type_Definition: An area underlain by coal-bearing rocks.
        Entity_Type_Definition_Source: National Atlas of the United States
      Attribute:
        Attribute_Label: Shape
        Attribute_Definition: The representation of the entity in the data.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Polygon
            Enumerated_Domain_Value_Definition: 2-dimensional element
            Enumerated_Domain_Value_Definition_Source: ESRI GIS Software
      Attribute:
        Attribute_Label: Area
        Attribute_Definition:
          The size of the shape in square coverage units.  In the distributed
          file, coverage units represent square decimal degrees.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 580104.500
            Range_Domain_Maximum: 270722121728
      Attribute:
        Attribute_Label: Perimeter
        Attribute_Definition:
          The perimeter of shape in coverage units.  In the distributed file,
          coverage units represent decimal degrees.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 3617.981
            Range_Domain_Maximum: 10878455.000
      Attribute:
        Attribute_Label: Coalfdp050
        Attribute_Definition: Internal feature number
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 2
            Range_Domain_Maximum: 994
      Attribute:
        Attribute_Label: Max_rank
        Attribute_Definition:
          A unique code that indicates the maximum rank of coal within the field
          or part of a coal region.
        Attribute_Definition_Source:
          Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
          Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
          United States (Sheet 2 - Alaska): U.S. Geological Survey Map, 1:500000.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 0
            Enumerated_Domain_Value_Definition: An internal polygon where no coal is present.
            Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 20
            Enumerated_Domain_Value_Definition: Anthracite coal that is potentially minable.
            Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 25
            Enumerated_Domain_Value_Definition: Anthracite coal of other potential uses.
            Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 30
            Enumerated_Domain_Value_Definition: Sub-bituminous coal that is potentially minable.
            Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 35
            Enumerated_Domain_Value_Definition: Sub-bituminous coal of other potential uses.
            Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 40
            Enumerated_Domain_Value_Definition: Low-volatile bituminous coal that is potentially minable.
            Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 45
            Enumerated_Domain_Value_Definition: Low-volatile bituminous coal of other potential uses.
            Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 50
            Enumerated_Domain_Value_Definition: Lignite coal that is potentially minable.
            Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 55
            Enumerated_Domain_Value_Definition: Lignite coal of other potential uses.
            Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 60
            Enumerated_Domain_Value_Definition:
              Medium and high volatile bituminous coal that is potentially
              minable.
            Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 65
            Enumerated_Domain_Value_Definition: Medium and high volatile bituminous coal of other potential uses.
            Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
      Attribute:
        Attribute_Label: Description
        Attribute_Definition:
          A description of the maximum rank, denoting potential minability and
          other potential uses.
        Attribute_Definition_Source:
          Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
          Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
          United States (Sheet 2 - Alaska): U.S. Geological Survey Map, 1:500000.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: NO COAL / INTERNAL POLYGON
            Enumerated_Domain_Value_Definition: Non-coal area within a coal field.
            Enumerated_Domain_Value_Definition_Source: American Society for Testing and Materials, 1996, Standard 388.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Anthracite / potentially minable
            Enumerated_Domain_Value_Definition:
              Anthracite is highly metamorphosed coal in which fixed carbon
              content is between 92% and 98% (on a dry, mineral-matter-free
              basis).  It is hard and black, with a semimetallic luster and a
              semiconchoidal fracture.  Can include meta-anthracite and
              semianthracite in this data set.  Sufficient data exist to define
              these known coal areas.
            Enumerated_Domain_Value_Definition_Source: American Society for Testing and Materials, 1996, Standard 388.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Anthracite / other uses
            Enumerated_Domain_Value_Definition:
              Anthracite is highly metamorphosed coal in which fixed carbon
              content is between 92% and 98% (on a dry, mineral-matter-free
              basis).  It is hard and black, with a semimetallic luster and a
              semiconchoidal fracture.  Can include meta-anthracite and
              semianthracite in this data set.  Information on coal is meager or
              coals may be thin or of poor quality.  Potential uses may include
              carbon dioxide sequestration, in-situ gasification, and coalbed
              methane production.
            Enumerated_Domain_Value_Definition_Source: American Society for Testing and Materials, 1996, Standard 388.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Low Volatile Bituminous / potentially minable
            Enumerated_Domain_Value_Definition:
              Low volatile bituminous coal has a fixed carbon content equal to or
              greater than 78% and less than 86% and a volatile matter content
              greater than 14% and less than or equal to 22% (on a dry, mineral-
              matter-free basis).  Sufficient data exist to define these known
              coal areas.
            Enumerated_Domain_Value_Definition_Source: American Society for Testing and Materials, 1996, Standard 388.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Low Volatile Bituminous / other uses
            Enumerated_Domain_Value_Definition:
              Low volatile bituminous coal has a fixed carbon content equal to or
              greater than 78% and less than 86% and a volatile matter content
              greater than 14% and less than or equal to 22% (on a dry, mineral-
              matter-free basis).  Information on coal is meager or coals may be
              thin or of poor quality.  Potential uses include carbon dioxide
              sequestration, in-situ gasification, and coalbed methane production.
            Enumerated_Domain_Value_Definition_Source: American Society for Testing and Materials, 1996, Standard 388.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Medium and High Volatile Bituminous / potentially minable
            Enumerated_Domain_Value_Definition:
              Medium volatile bituminous coal has a fixed carbon content equal to
              or greater than 69% and less than 78% and a volatile matter content
              greater than 22% and less than or equal to 31% (on a dry, mineral-
              matter-free basis).  High volatile bituminous coal has less than 69%
              fixed carbon and greater than 31% volatile matter (on a dry,
              mineral-matter-free basis).  Sufficient data exist to define these
              known coal areas.
            Enumerated_Domain_Value_Definition_Source: American Society for Testing and Materials, 1996, Standard 388.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Medium and High Volatile Bituminous / other uses
            Enumerated_Domain_Value_Definition:
              Medium volatile bituminous coal has a fixed carbon content equal to
              or greater than 69% and less than 78% and a volatile matter content
              greater than 22% and less than or equal to 31% (on a dry, mineral-
              matter-free basis).  High volatile bituminous coal has less than 69%
              fixed carbon and greater than 31% volatile matter (on a dry,
              mineral-matter-free basis).  Information on coal is meager or coals
              may be thin or of poor quality.  Potential uses include carbon
              dioxide sequestration, in-situ gasification, and coalbed methane
              production.
            Enumerated_Domain_Value_Definition_Source: American Society for Testing and Materials, 1996, Standard 388.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Subbituminous / potentially minable
            Enumerated_Domain_Value_Definition:
              Subbituminous coal has gross calorific values less than 11,500
              British thermal units per pound but greater than 8,300 British
              thermal units per pound (on a moist, mineral-matter-free basis).  It
              is intermediate in rank between lignite and bituminous coal.
              Sufficient data exist to define these known coal areas.
            Enumerated_Domain_Value_Definition_Source: American Society for Testing and Materials, 1996, Standard 388.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Subbituminous / other uses
            Enumerated_Domain_Value_Definition:
              Subbituminous coal has gross calorific values less than 11,500
              British thermal units per pound but greater than 8,300 British
              thermal units per pound (on a moist, mineral-matter-free basis).  It
              is intermediate in rank between lignite and bituminous coal.
              Information on coal is meager or coals may be thin or of poor
              quality.  Potential uses include carbon dioxide sequestration,
              in-situ gasification, and coalbed methane production.
            Enumerated_Domain_Value_Definition_Source: American Society for Testing and Materials, 1996, Standard 388.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Lignite / potentially minable
            Enumerated_Domain_Value_Definition:
              Lignite coal has gross calorific values less than 8,300 British
              thermal units per pound (on a moist, mineral-matter-free basis).  It
              is the lowest rank of consolidated coal, usually brownish-black in
              color.  Sufficient data exist to define these known coal areas.
            Enumerated_Domain_Value_Definition_Source: American Society for Testing and Materials, 1996, Standard 388.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Lignite / other uses
            Enumerated_Domain_Value_Definition:
              Lignite coal has gross calorific values less than 8,300 British
              thermal units per pound (on a moist, mineral-matter-free basis).  It
              is the lowest rank of consolidated coal, usually brownish-black in
              color.  Information on coal is meager or coals may be thin or of
              poor quality.  Potential uses include carbon dioxide sequestration,
              in-situ gasification, and coalbed methane production.
            Enumerated_Domain_Value_Definition_Source: American Society for Testing and Materials, 1996, Standard 388.
      Attribute:
        Attribute_Label: Province
        Attribute_Definition: The name of the coal province in which the field occurs.
        Attribute_Definition_Source:
          Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
          Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
          United States (Sheet 2 - Alaska): U.S. Geological Survey Map, 1:500000.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Alaska
            Enumerated_Domain_Value_Definition: Province includes coal fields in Alaska.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Eastern
            Enumerated_Domain_Value_Definition: Province includes coal fields along U.S. eastern seaboard.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Gulf
            Enumerated_Domain_Value_Definition: Province includes coal fields along U.S. Gulf Coastal region.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Interior
            Enumerated_Domain_Value_Definition: Province includes coal fields in the central U.S.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Northern Great Plains
            Enumerated_Domain_Value_Definition:
              Province includes coal fields in the Northern Great Plains area
              between the Rocky Mountain and Interior coal provinces.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Pacific Coast
            Enumerated_Domain_Value_Definition: Province includes coal fields along U.S. western seaboard.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Rocky Mountain
            Enumerated_Domain_Value_Definition:
              Province includes coal fields in the Rocky Mountain region between
              Canadian and Mexican borders.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.
      Attribute:
        Attribute_Label: Name
        Attribute_Definition: The name of the coal field or region.
        Attribute_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: <blank>
            Enumerated_Domain_Value_Definition: The area has no coal field or region name in the sources.
            Enumerated_Domain_Value_Definition_Source: National Atlas of the United States
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Appalachian Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Alabama, Georgia, Kentucky, Maryland,
              Mississippi, New York, Ohio, Pennsylvania, Tennessee, Virginia, and
              West Virginia in the Appalachian Mountains.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Atlantic Coast Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of North Carolina, Virginia, and West Virginia.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Bering River Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Alaska near the Bering River.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Big Horn Basin Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Montana and Wyoming around the Big Horn Basin.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Black Hills Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of South Dakota and Wyoming around the Black
              Hills.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Black Mesa Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of northeastern Arizona near Black Mesa.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Blackfeet-Valier Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of northwestern Montana.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Broad Pass Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central Alaska near Broad Pass.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Bull Mountain Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central Montana around Bull Mountain.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Canon City Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central Colorado around Canon City.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Carthage Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central New Mexico around Carthage.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Centralia-Chehalis Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southwestern Washington around Centralia and
              Chehalis.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Cerrillos Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of north central New Mexico around Cerrillos.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Chicago Creek Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Alaska near Chicago Creek.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Chignik Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southwestern Alaska near Chignik.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Coaldale Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of western Nevada around Coaldale.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Coos Bay Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Oregon around Coos Bay.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Cretaceous Lignite Area
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central Kansas.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Datil Mountains Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of western New Mexico near the Datil Mountains.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Deer Creek Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southeastern Arizona.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Denver Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Colorado around Denver.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Eagle Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of eastern Alaska near the town of Eagle.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Eagle Pass Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Texas near the town of Eagle Pass.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Eagle Springs Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of western Texas.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Eastern Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Illinois, Indiana, Iowa, Kentucky, and
              Missouri.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Eden Ridge Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southwestern Oregon near Eden Ridge.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,

              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Electric Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Montana and Wyoming near the town of Electric.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Engle Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southwestern New Mexico near the town of Engle.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Fort Union Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Montana, North Dakota, South Dakota, and
              Wyoming around Fort Union.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Garfield County Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of east central Montana in Garfield County.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Glacier Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of northwestern Washington near the town of
              Glacier.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Goose Creek Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Idaho, Nevada, and Utah near the Goose Creek
              Mountains.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Goshen Hole Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Nebraska and Wyoming near Goshen Hole.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Great Falls Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central Montana near Great Falls.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Green River Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Colorado, Utah, and Wyoming.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Hams Fork Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Idaho, Utah, and Wyoming.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Hanna Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of south central Wyoming near the town of Hanna.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Henry Mountains Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southern Utah near the Henry Mountains.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Herendeen Bay Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southwestern Alaska near Herendeen Bay.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Horseshoe Bend Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Idaho near the town of Horseshoe Bend.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Ione Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central California near the town of Ione.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Jackson Hole Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Wyoming near Jackson Hole.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Jarvis Creek Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of eastern Alaska near Jarvis Creek.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Jornada del Muerto Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central New Mexico.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Kelso-Castle Rock Area
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southwestern Washington near the towns of
              Kelso and Castle Rock.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Kenai Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southern Alaska around Kenai.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Kobuk Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of northwestern Alaska near the town of Kobuk.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Lewistown Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central Montana near Lewistown.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Livingston-Trail Creek Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southwestern Montana near Livingston and Trail
              Creek.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Lombard Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southwestern Montana near Lombard.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Matanuska Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southern Alaska near Matanuska.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Mississippi Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Alabama, Arkansas, Florida, Georgia, Kentucky,
              Mississippi, Missouri, and Tennessee.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Missoula Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of western Montana near Missoula.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Monero Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of northern New Mexico near Monero.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Nenana Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central Alaska near Nenana.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: North Central Fields
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of north central Pennsylvania.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: North Park Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of northern Colorado near North Park.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: North-Central Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of north central Montana.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Northern Alaska Fields
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of northern Alaska.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Northern Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central Michigan.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Orofino Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Idaho near the town of Orofino.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Pagosa Springs Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of south central Colorado near Pagosa Springs.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Pennsylvania Anthracite Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of eastern Pennsylvania.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Pinedale Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of eastern Arizona near the town of Pinedale.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Powder River Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Montana and Wyoming around the Powder River.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Rampart Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central Alaska near the town of Rampart.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Raton Mesa Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Colorado and New Mexico near the town of Raton,
              New Mexico.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Rhode Island Meta-Anthracite Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Massachusetts and Rhode Island.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Rio Puerco Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of northwestern New Mexico.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Rock Creek Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southeastern Wyoming.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Roslyn Cleelum Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central Washington.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: San Carlos Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of western Texas.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: San Juan River Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Arizona, Colorado, New Mexico, and Utah around
              the San Juan River.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Santo Tomas Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southern Texas around the town of Santo Tomas.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Sierra Blanca Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of south central New Mexico.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Skagit County Area
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of western Washington in Skagit County.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: South Park Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central Colorado.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Southwestern Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central Texas.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Southwestern Utah Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southwestern Utah.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Stillwater Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southern Montana in Stillwater County.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Stone Canyon Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central California.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Summit Creek Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of western Washington.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Susitna Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southern Alaska near the town of Susitna.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Terlingua Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southwestern Texas near the town of Terlingua.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Tertiary Lake Beds Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of western Montana.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Texas Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Arkansas, Louisiana, and Texas.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Tijeras Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central New Mexico near the town of Tijeras.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Tongue Mesa Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southwestern Colorado.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Uinta Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Colorado and Utah.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Una del Gato Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central New Mexico.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Unga Island Field
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of southwestern Alaska near Unga Island.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Western Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of Arkansas, Iowa, Kansas, Missouri, Nebraska, and
              Oklahoma.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Whatcom County Area
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of western Washington in Whatcom County.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Wind River Region
            Enumerated_Domain_Value_Definition:
              The name given to the area, underlain by coal-bearing strata, which
              includes portions of central Wyoming.
            Enumerated_Domain_Value_Definition_Source:
              Trumbull, 1960, Coal Fields of the United States (Sheet 1): U.S.
              Geological Survey Map, 1:5000000.  Barnes, 1961, Coal Fields of the
              United States (Sheet 2 - Alaska): U.S. Geological Survey Map,
              1:500000.  Keystone Coal Industry Manual, 2000: Intertec Publishing
              Corporation, Chicago, Illinois, 793 p.
  Distribution_Information:
    Distributor:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Susan J. Tewalt
        Contact_Address:
          Address_Type: Mailing address
          Address: MS 956 National Center
          City: Reston
          State_or_Province: Virginia
          Postal_Code: 20192
          Country: USA
        Contact_Voice_Telephone: 703-648-6437
    Distribution_Liability:
      Although these data have been processed successfully on a computer system
      at the U.S. Geological Survey, no warranty expressed or implied is made by
      the U.S. Geological Survey regarding the utility of the data on any other
      system, nor shall the act of distribution constitute any such warranty.
      No responsibility is assumed by the U.S. Geological Survey in the use of
      these data.

      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: ESRI shapefile
        Digital_Transfer_Option:
          Online_Option:
            Computer_Contact_Information:
              Network_Address:
                Network_Resource_Name: <http://nationalatlas.gov/atlasftp.html?openChapters=chpgeol#chpgeol>
      Digital_Form:
        Digital_Transfer_Information:
          Format_Name: SDTS
        Digital_Transfer_Option:
          Online_Option:
            Computer_Contact_Information:
              Network_Address:
                Network_Resource_Name: <http://nationalatlas.gov/atlasftp.html?openChapters=chpgeol#chpgeol>

      Fees: There is no charge for the map layer.

  Metadata_Reference_Information:
    Metadata_Date: 20060620
    Metadata_Contact:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Peg Rawson
          Contact_Organization: National Atlas of the United States
        Contact_Address:
          Address_Type: Mailing address
          Address: 12201 Sunrise Valley Dr
          Address: MS 561
          City: Reston
          State_or_Province: VA
          Postal_Code: 20192
        Contact_Voice_Telephone: 703-648-4183
        Contact_Electronic_Mail_Address: atlasmail@usgs.gov
    Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
    Metadata_Standard_Version: FGDC-STD-001-1998
    Metadata_Security_Information:
      Metadata_Security_Classification_System: None
      Metadata_Security_Classification: Unclassified
      Metadata_Security_Handling_Description: None