Identification_Information:
  Citation:
    Citation_Information:
      Originator: Labay, Keith A.
      Originator: Wilson,  Frederic H.
      Originator: Bleick, Heather
      Originator: Shew, Nora  B.
      Publication_Date: 2008
      Title:
        Digital data for the geology of the southern Brooks
        Range, Alaska
      Edition: ver 1.0
      Geospatial_Data_Presentation_Form: digital data
      Series_Information:
        Series_Name: U.S. Geological Survey Open-File Report
        Issue_Identification: OFR 2008-XXXX
      Online_Linkage: http//pubs.usgs.gov/of/2008/XXXX
      Larger_Work_Citation:
        Citation_Information:
          Originator: Till, Alison B.
          Originator: Dumoulin, Julie, A.
          Originator: Harris, Anita G.
          Originator: Moore, Thomas E.
          Originator: Bleick, Heather
          Originator: Siwiec, Benjamin
          Publication_Date: 2008
          Title:
            Bedrock geologic map of the southern Brooks Range, Alaska,
            and accompanying conodont data
          Geospatial_Data_Presentation_Form: map
          Series_Information:
            Series_Name: U.S. Geological Survey Scientific Investigations Map
            Issue_Identification: SIM-XXXX
  Description:
    Abstract:
      The southern Brooks Range spans northern Alaska from west
      to east.  It has tree- and shrub-covered lowlands and
      tundra-covered and rocky uplands.  Much of the area has
      ridgelines reaching about 4000 feet, but the central part
      of the map area has ridgelines exceeding 6000 feet and
      peaks above 7000 feet.  The geology includes the Brooks
      Range orogen, a contractional mountain belt with a foreland
      basin on its north side.

      This map has been compiled from published maps and papers,
      and unpublished mapping by the authors.

      This data set is a portion of a statewide geology database,
      which is being compiled by the U.S. Geological Survey's
      National Surveys and Analysis (NSA) project, whose goal
      is to compile geologic, geochemical, geophysical, and
      other data.

    Purpose:
      This data set represents part of a systematic effort to
      release geologic map data for the United States in a
      uniform manner.  Geologic data in this series has been
      compiled from a wide variety of sources, published and
      unpublished, ranging from state and regional geologic maps
      to large-scale field mapping.
  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 2008
    Currentness_Reference: publication date
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -162.0
      East_Bounding_Coordinate: -146.0
      North_Bounding_Coordinate: 68.0
      South_Bounding_Coordinate: 66.75
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: geology
      Theme_Keyword: bedrock
      Theme_Keyword: orogen
      Theme_Keyword: schist belt
      Theme_Keyword: metamorphic
    Place:
      Place_Keyword_Thesaurus: Geographic names information system (GNIS)
      Place_Keyword: Alaska
      Place_Keyword: Brooks Range
      Place_Keyword: Baird Mountains
      Place_Keyword: Ambler River
      Place_Keyword: Survey Pass
      Place_Keyword: Wiseman
      Place_Keyword: Chandalar
      Place_Keyword: Christian
      Place_Keyword: Selawik
      Place_Keyword: Shungnak
      Place_Keyword: Bettles
      Place_Keyword: Beaver
  Access_Constraints: None
  Use_Constraints:
    None.  Acknowledgment of the U.S. Geological Survey would
    be appreciated in products derived from these data.
  Point_of_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
        Contact_Person: Alison B. Till
      Contact_Position: Geologist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 4200 University Drive
        City: Anchorage
        State_or_Province: Alaska
        Postal_Code: 99508
        Country: U.S.A.
      Contact_Voice_Telephone: 907-786-7444
      Contact_Electronic_Mail_Address: atill@usgs.gov
  Browse_Graphic:
    Browse_Graphic_File_Name: XXX
    Browse_Graphic_File_Description: XXX
    Browse_Graphic_File_Type: XXX
  Data_Set_Credit:
    This data set was prepared by Keith Labay (USGS), Nora
    Shew (USGS), David Pray (contractor), Nathan Pannkuk
    (contractor), Lana Cohen (contractor), Jeanie Yarnell
    (contractor)


  Native_Data_Set_Environment:
    Data set was created using ESRI ARC/Info version 7.2.1
    on a Unix platform.
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report:
      There were many types of source materials, of varying scale,
      used to compile this data set.  Sources include previously
      published maps and unpublished mapping.  The dates of the
      mapping range from the present to 1950's.  Vector features
      were digitized on a large digitizing tablet or on screen
      from a scanned image.  Vector and polygon attributes were
      assigned based on the original source. the digital data
      has been checked, and the geologic map has been technically
      reviewed and edited.
  Logical_Consistency_Report:
    Each geology coverage is a network coverage containing
    attributed arcs and polyons.  Each polygon has a coded
    attribute designating the mapped geologic unit.  Faults,
    stratigraphic contacts, and other linear features are
    represented as arcs.  When a fault is also a stratigraphic
    contact, only a single arc is present.  Dangling arcs may
    be present (faults, dike, etc.)
  Completeness_Report:
    The complete data set consists of 11 geology GIS
    converages.  There is also an associated relational
    database of geologic units.  Each coverage has the full or
    partial extent of a 1:250,000 scale quadrangle.  A
    graphic representation of the database (map) and a report
    including complete geologic unit descriptions is provided
    in .pdf format.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report:
        This data is presented for use at a nominal scale of
        1:500,000.
  Lineage:
    Process_Step:
      Process_Description:
        Line work for the geology compilation was hand digitized
        from material of various media and scale.  The arcs and
        polygons were attributed.  The spatial databases are
        provided in UTM projection and geographic coordinates.
        The native ARC/Info coverages have been exported to an
        interchange file format, and also converted to shape files.
        Please note that shape files do not preserve arc directions,
        which help determine fault movement.
      Process_Date: 2007
      Process_Contact:
        Contact_Information:
          Contact_Organization_Primary:
            Contact_Organization: U.S. Geological Survey
            Contact_Person: Frederic H. Wilson
          Contact_Position: Geologist
          Contact_Address:
            Address_Type: mailing and physical
            Address: 4200 University Drive
            City: Anchorage
            State_or_Province: Alaska
            Postal_Code: 99508-4667
            Country: U.S.A.
          Contact_Voice_Telephone: 907-786-7448
          Contact_Electronic_Mail_Address: fwilson@usgs.gov
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Vector
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Grid_Coordinate_System:
        Grid_Coordinate_System_Name: Universal Transverse Mercator
        Universal_Transverse_Mercator:
          UTM_Zone_Number: 4
          Transverse_Mercator:
            Scale_Factor_at_Central_Meridian: 0.9995
            Longitude_of_Central_Meridian: -159.0
            Latitude_of_Projection_Origin: 0.0
            False_Easting: 500000
            False_Northing: 0
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: coordinate pair
        Coordinate_Representation:
          Abscissa_Resolution: 0.000256
          Ordinate_Resolution: 0.000256
        Planar_Distance_Units: meters
    Planar:
      Grid_Coordinate_System:
        Grid_Coordinate_System_Name: Universal Transverse Mercator
        Universal_Transverse_Mercator:
          UTM_Zone_Number: 5
          Transverse_Mercator:
            Scale_Factor_at_Central_Meridian: 0.9995
            Longitude_of_Central_Meridian: -153.0
            Latitude_of_Projection_Origin: 0.0
            False_Easting: 500000
            False_Northing: 0
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: coordinate pair
        Coordinate_Representation:
          Abscissa_Resolution: 0.000256
          Ordinate_Resolution: 0.000256
        Planar_Distance_Units: meters
    Planar:
      Grid_Coordinate_System:
        Grid_Coordinate_System_Name: Universal Transverse Mercator
        Universal_Transverse_Mercator:
          UTM_Zone_Number: 6
          Transverse_Mercator:
            Scale_Factor_at_Central_Meridian: 0.9995
            Longitude_of_Central_Meridian: -147.0
            Latitude_of_Projection_Origin: 0.0
            False_Easting: 500000
            False_Northing: 0
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: coordinate pair
        Coordinate_Representation:
          Abscissa_Resolution: 0.000256
          Ordinate_Resolution: 0.000256
        Planar_Distance_Units: meters
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: polygons
      Entity_Type_Definition:
        Characteristics of the polygon features in the geology
        coverages are coded in the polygon attribute table.  The
        table <cov>.pat includes the following items:  CLASS,
        QCLASS, LITH2, SOURCE, NSACLASS, NSAMOD, LABEL, MIN_AGE,
        and MAX_AGE.  Item LITH2 is used to generate the southern
        Brooks range map of Till and others, in press.  NSACLASS
        is used for creating the generalized geologic map of
        Alaska.  Items CLASS and SOURCE together identify the
        original mapping of the geologic unit.
      Entity_Type_Definition_Source: this data set
    Attribute:
      Attribute_Label: LITH2
      Attribute_Definition:
        LITH2 is a positive integer value (4 5 B) item in the
        polygon attribute table.  Values range discontinuously
        from 0 to 52090.  LITH2 is a numeric code for the
        geologic unit (LABEL), as shown on the southern Brooks
        range map by Till and others, in press.  LITH2 to LABEL
        is a one-to-one relationship.

        NOTE:  Because of the limitations of common GIS fonts, the
        letters "C", "Mz", "Pz", "Tr", and "Z" are substituted for
        the standard symbols for "Cambrian", "Mesozoic",
        "Paleozoic", "Triassic", and "Proterozoic".
      Attribute_Definition_Source: this data set
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 100
          Enumerated_Domain_Value_Definition: Qs - Surficial sedimentary deposits, undivided (Quaternary)
        Enumerated_Domain:
          Enumerated_Domain_Value: 102
          Enumerated_Domain_Value_Definition: water
        Enumerated_Domain:
          Enumerated_Domain_Value: 2180
          Enumerated_Domain_Value_Definition: Kvg - Volcanic lithic sandstone and mudstone (Cretaceous)
        Enumerated_Domain:
          Enumerated_Domain_Value: 5145
          Enumerated_Domain_Value_Definition: KJm - Melange (Cretaceous to Jurassic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52000
          Enumerated_Domain_Value_Definition: Dsq - Quartz-mica schist (Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52001
          Enumerated_Domain_Value_Definition: DZsc - Calcareous schist (Devonian to Proterozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52002
          Enumerated_Domain_Value_Definition:
            PzZb - Metasedimentary rocks of Bluecloud Mountain
            (Paleozoic to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52003
          Enumerated_Domain_Value_Definition: Dg - Granitic orthogneiss (Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52004
          Enumerated_Domain_Value_Definition: Da - Ambler sequence (Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52006
          Enumerated_Domain_Value_Definition: Pzsg - Mafic schist (Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52007
          Enumerated_Domain_Value_Definition: Pzpg - Phyllite and graywacke (Paleozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52008
          Enumerated_Domain_Value_Definition: DZm - Metamorphic rocks (Devonian to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52009
          Enumerated_Domain_Value_Definition:
            JDab - Mafic metavolcanic and metaintrusive rocks, metachert,
            metalimestone, and amphibolite of the Angayucham terrane
            (Early Jurassic to Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52011
          Enumerated_Domain_Value_Definition: Zg - Granitic orthogneiss (Proterozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52012
          Enumerated_Domain_Value_Definition:
            PzZem - Metamorphic rocks of the Ernie Lake area (Paleozoic
            to Proterozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52013
          Enumerated_Domain_Value_Definition: Zam - Metamorphic rocks of Mt. Angayukaqsraq (Proterozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52015
          Enumerated_Domain_Value_Definition:
            OZc - Older carbonate rocks of the Nanielik antiform
            (Middle Ordovician to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52016
          Enumerated_Domain_Value_Definition:
            DOc - Younger carbonate rocks of the Nanielik antiform
            (Middle Devonian to Ordovician)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52017
          Enumerated_Domain_Value_Definition:
            Dmu - Metasedimentary and lesser metaigneous rocks (Middle
            and Late Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52018
          Enumerated_Domain_Value_Definition: Dhf - Hunt Fork Shale (Late Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52019
          Enumerated_Domain_Value_Definition: Dl - Metalimestone (Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52021
          Enumerated_Domain_Value_Definition:
            PzZqs - Quartz-rich metasedimentary rocks (Paleozoic to
            Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52022
          Enumerated_Domain_Value_Definition: Khs - Hammond River shear zone (Cretaceous?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52023
          Enumerated_Domain_Value_Definition: Pzm - Marble (Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52026
          Enumerated_Domain_Value_Definition: TrCs - Sedimentary rocks (Triassic to Carboniferous)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52027
          Enumerated_Domain_Value_Definition: Ml - Carbonate rocks (Mississippian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52028
          Enumerated_Domain_Value_Definition:
            MDk - Kanayut Conglomerate (Lower Mississippian? and Upper
            Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52030
          Enumerated_Domain_Value_Definition: Pzp - Phyllite (Paleozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52032
          Enumerated_Domain_Value_Definition: Pzj - Metasedimentary rocks of Jesse Mountain (Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52034
          Enumerated_Domain_Value_Definition: PzZbs - Biotite schist (Paleozoic to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52035
          Enumerated_Domain_Value_Definition: PzZsr - Ruby schist (Paleozoic to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52036
          Enumerated_Domain_Value_Definition: Km - Migmatite (Cretaceous)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52037
          Enumerated_Domain_Value_Definition: Kg - Granitic rocks (Cretaceous)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52038
          Enumerated_Domain_Value_Definition: Ks - Conglomerate, sandstone, and shale (Cretaceous)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52039
          Enumerated_Domain_Value_Definition: QTb - Basalt (Quaternary? or Tertiary?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52041
          Enumerated_Domain_Value_Definition:
            DZsc - Calcareous schist; metachert and conglomerate
            subunit (Devonian to Proterozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52042
          Enumerated_Domain_Value_Definition:
            Ozc - Older carbonate rocks of the Nanielik antiform;
            restricted to Ordovian strata only (Middle Ordovician to
            Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52043
          Enumerated_Domain_Value_Definition:
            Dmu - Metasedimentary and lesser metaigneous rocks;
            volcanic-rock bearing (Middle and Late Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52044
          Enumerated_Domain_Value_Definition: Dhf - Hunt Fork Shale (Late Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52045
          Enumerated_Domain_Value_Definition: DZgn - Schist and paragneiss (Devonian to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52046
          Enumerated_Domain_Value_Definition:
            PzZcm - Metasedimentary and metavolcanic rocks, undivided
            (Paleozoic and Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52047
          Enumerated_Domain_Value_Definition: PzZm - Mafic schist (Paleozoic? to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52048
          Enumerated_Domain_Value_Definition:
            DZsm - Schist and marble, undivided (Devonian to
            Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52049
          Enumerated_Domain_Value_Definition: Spl - Black phyllite and metalimestone (Silurian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52052
          Enumerated_Domain_Value_Definition:
            Dmu - Metasedimentary and lesser metaigneous rocks;
            iron-rich and calcareous components (Middle and Late
            Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52053
          Enumerated_Domain_Value_Definition: Pzw - Metasedimentary rocks (Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52055
          Enumerated_Domain_Value_Definition: Pzw - Metasedimentary rocks; northern belt (Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52056
          Enumerated_Domain_Value_Definition: Dn - Noatak Sandstone (Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52057
          Enumerated_Domain_Value_Definition: SCvs - Volcanic and sedimentary rocks (Silurian to Cambrian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52061
          Enumerated_Domain_Value_Definition:
            Mkl - Kayak Shale of Endicott Group and Lisburne Group
            (Mississippian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52062
          Enumerated_Domain_Value_Definition: Mu - Metasedimentary rocks, undivided (Mississippian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52063
          Enumerated_Domain_Value_Definition:
            DZsc - Calcareous schist; abundant albite
            porphyroblasts (Devonian to Proterozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52065
          Enumerated_Domain_Value_Definition: Pzbq - Black quartzite (Paleozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52066
          Enumerated_Domain_Value_Definition: Pzb - Black phyllite and siliceous phyllite (Paleozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52067
          Enumerated_Domain_Value_Definition: PzZg - Granitic rocks (Paleozoic to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52068
          Enumerated_Domain_Value_Definition: Zam - Metamorphic rocks of Mt. Angayukaqsraq (Proterozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52069
          Enumerated_Domain_Value_Definition: DOb - Baird Group (Devonian to Ordovician)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52070
          Enumerated_Domain_Value_Definition: MDer - Eli River sequence (Mississippian and Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52071
          Enumerated_Domain_Value_Definition: Mcp - Carbonaceous chert and siliceous phyllite (Mississippian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52073
          Enumerated_Domain_Value_Definition: MzPzs - Serpentintite (Mesozoic? to Paleozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52074
          Enumerated_Domain_Value_Definition: MDe - Endicott Group, undivided (Mississippian and Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52075
          Enumerated_Domain_Value_Definition:
            JDk - Rocks of the Kivivik Creek sequence (Jurassic to
            Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52076
          Enumerated_Domain_Value_Definition:
            MzDm - Igneous and sedimentary rocks of the Maiyumerak
            Mountains (Mesozoic? to Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52077
          Enumerated_Domain_Value_Definition: Mc - Quartz-rich conglomerate (Mississippian?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52081
          Enumerated_Domain_Value_Definition: Dps - Lithic sandstone and shale (Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52083
          Enumerated_Domain_Value_Definition: Dps - Lithic sandstone and shale; schistose (Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52084
          Enumerated_Domain_Value_Definition: DSc - Carbonate rocks of Cosmos Hills (Devonian and Silurian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52085
          Enumerated_Domain_Value_Definition: Pzbs - Black metasedimentary rocks (Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52086
          Enumerated_Domain_Value_Definition: Pzpc - Carbonate rocks of phyllite belt (Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52087
          Enumerated_Domain_Value_Definition: Pzsm - Marble of the Schist belt (Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52088
          Enumerated_Domain_Value_Definition:
            Mkkl - Kekiktuk Conglomerate(?), Kayak Shale of Endicott
            Group, and Lisburne Group (Mississippian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52089
          Enumerated_Domain_Value_Definition:
            MDk - Kanayut Conglomerate; area not differentiated from
            Noatak Sandstone (Lower Mississippian? and Upper
            Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 52090
          Enumerated_Domain_Value_Definition: JCs - Sedimentary rocks (Jurassic to Carboniferous)
    Attribute:
      Attribute_Label: NSACLASS
      Attribute_Definition:
        NSACLASS is a positive integer value (4 5 B) item in the
        polygon attribute table.  Values range discontinuously
        from 100 to 9325.  NSACLASS is a numeric code for the
        geologic unit for the statewide database.  This data set
        represents a generalized map, thus it is possible that a
        geologic unit consists of multiple NSACLASS values.  Each
        NSACLASS matches to a geologic unit label in LABEL and
        has minimum (MIN_AGE) and maximum (MAX_AGE) range, given
        in million of years (my).

        Supplemental attribute tables included with this data set
        contain additional descriptive information of each geologic
        unit.  A user may use items SOURCE and CLASS to retrieve
        information about the original units from which these
        generalized units were formed.

        NOTE:  Because of the limitations of common GIS fonts, the
        letters "C", "Mz", "Pz", "Tr", and "Z" are substituted
        for the standard symbols for "Cambrian", "Mesozoic",
        "Paleozoic","Triassic", and "Proterozoic".
      Attribute_Definition_Source: this data set
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 100
          Enumerated_Domain_Value_Definition:
            Qs - Surficial sedimentary deposits, undivided (Quaternary);
            QCLASS = 1000
        Enumerated_Domain:
          Enumerated_Domain_Value: 102
          Enumerated_Domain_Value_Definition: water; QCLASS = 102
        Enumerated_Domain:
          Enumerated_Domain_Value: 350
          Enumerated_Domain_Value_Definition: QTb - Basalt (Quaternary? or Tertiary?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 1990
          Enumerated_Domain_Value_Definition: Ks - Conglomerate, sandstone, and shale (Cretaceous)
        Enumerated_Domain:
          Enumerated_Domain_Value: 2030
          Enumerated_Domain_Value_Definition: Ks - Conglomerate, sandstone, and shale (Cretaceous)
        Enumerated_Domain:
          Enumerated_Domain_Value: 2180
          Enumerated_Domain_Value_Definition: Kvg - Volcanic lithic sandstone and mudstone (Cretaceous)
        Enumerated_Domain:
          Enumerated_Domain_Value: 2492
          Enumerated_Domain_Value_Definition: Kg - Granitic rocks (Cretaceous)
        Enumerated_Domain:
          Enumerated_Domain_Value: 2610
          Enumerated_Domain_Value_Definition: Km - Migmatite (Cretaceous)
        Enumerated_Domain:
          Enumerated_Domain_Value: 2650
          Enumerated_Domain_Value_Definition: Khs - Hammond River shear zone (Cretaceous?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 3498
          Enumerated_Domain_Value_Definition: MzPzs - Serpentinite (Mesozoic? to Paleozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 4951
          Enumerated_Domain_Value_Definition:
            MzDm - Igneous and sedimentary rocks of the Maiyumerak
            Mountains (Mesozoic? to Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 5001
          Enumerated_Domain_Value_Definition:
            JDk - Rocks of the Kivivik Creek sequence (Jurassic to
            Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 5003
          Enumerated_Domain_Value_Definition: JCs - Sedimentary rocks (Jurassic to Carboniferous)
        Enumerated_Domain:
          Enumerated_Domain_Value: 5004
          Enumerated_Domain_Value_Definition: TrCs - Sedimentary rocks (Triassic to Carboniferous)
        Enumerated_Domain:
          Enumerated_Domain_Value: 5133
          Enumerated_Domain_Value_Definition:
            JDab - Mafic metavolcanic and metaintrusive rocks,
            metachert, metalimestone, and amphibolite of the
            Angayucham terrane (Early Jurassic to Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 5140
          Enumerated_Domain_Value_Definition:
            JDab - Mafic metavolcanic and metaintrusive rocks,
            metachert, metalimestone, and amphibolite of the
            Angayucham terrane (Early Jurassic to Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 5145
          Enumerated_Domain_Value_Definition: KJm - Melange (Cretaceous to Jurassic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 5525
          Enumerated_Domain_Value_Definition:
            DSc - Carbonate rocks of Cosmos Hills (Devonian and
            Silurian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 5560
          Enumerated_Domain_Value_Definition: Pzp - Phyllite (Paleozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 5565
          Enumerated_Domain_Value_Definition: Pzpg - Phyllite and graywacke (Paleozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 5570
          Enumerated_Domain_Value_Definition: Pzpc - Carbonate rocks of phyllite belt (Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6200
          Enumerated_Domain_Value_Definition:
            Mcp - Carbonaceous chert and siliceous phyllite
            (Mississippian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6300
          Enumerated_Domain_Value_Definition: MDe - Endicott Group, undivided (Mississippian and Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6305
          Enumerated_Domain_Value_Definition:
            Mkkl - Kekiktuk Conglomerate(?), Kayak Shale of Endicott
            Group, and Lisburne Group (Mississippian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6320
          Enumerated_Domain_Value_Definition: Ml - Carbonate rocks (Mississippian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6328
          Enumerated_Domain_Value_Definition:
            Mkl - Kayak Shale of Endicott Group and Lisburne Group
            (Mississippian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6331
          Enumerated_Domain_Value_Definition: Pzbs - Black metasedimentary rocks (Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6360
          Enumerated_Domain_Value_Definition: Mc - Quartz-rich conglomerate (Mississippian?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6365
          Enumerated_Domain_Value_Definition: Mu - Metasedimentary rocks, undivided (Mississippian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6686
          Enumerated_Domain_Value_Definition: Spl - Black phyllite and metalimestone (Silurian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6720
          Enumerated_Domain_Value_Definition:
            SCvs - Volcanic and sedimentary rocks (Silurian to
            Cambrian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6850
          Enumerated_Domain_Value_Definition: Pzj - Metasedimentary rocks of Jesse Mountain (Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6900
          Enumerated_Domain_Value_Definition: Dn - Noatak Sandstone (Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6914
          Enumerated_Domain_Value_Definition:
            MDk - Kanayut Conglomerate (Lower Mississippian? and
            Upper Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6915
          Enumerated_Domain_Value_Definition:
            MDk - Kanayut Conglomerate (Lower Mississippian? and Upper
            Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6925
          Enumerated_Domain_Value_Definition: Dhf - Hunt Fork Shale (Late Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6927
          Enumerated_Domain_Value_Definition:
            Dmu - Metasedimentary and lesser metaigneous rocks (Middle
            and Late Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6951
          Enumerated_Domain_Value_Definition: Dl - Metalimestone (Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6972
          Enumerated_Domain_Value_Definition:
            Dmu - Metasedimentary and lesser metaigneous rocks (Middle
            and Late Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6973
          Enumerated_Domain_Value_Definition:
            Dmu - Metasedimentary and lesser metaigneous rocks (Middle
            and Late Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6980
          Enumerated_Domain_Value_Definition:
            DOc - Younger carbonate rocks of the Nanielik antiform
            (Middle Devonian to Ordovician)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6982
          Enumerated_Domain_Value_Definition: MDer - Eli River sequence (Mississippian and Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 6983
          Enumerated_Domain_Value_Definition: Pzm - Marble (Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 7000
          Enumerated_Domain_Value_Definition: Pzsg - Mafic schist (Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 7200
          Enumerated_Domain_Value_Definition: Dps - Lithic sandstone and shale (Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 7215
          Enumerated_Domain_Value_Definition: Pzsm - Marble of the Schist belt (Paleozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 7225
          Enumerated_Domain_Value_Definition: Dhf - Hunt Fork Shale (Late Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 7235
          Enumerated_Domain_Value_Definition: Pzb - Black phyllite and siliceous phyllite (Paleozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 7250
          Enumerated_Domain_Value_Definition: Dg - Granitic orthogneiss (Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 7260
          Enumerated_Domain_Value_Definition: Da - Ambler sequence (Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 7360
          Enumerated_Domain_Value_Definition:
            DZsm - Schist and marble, undivided (Devonian to
            Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 7361
          Enumerated_Domain_Value_Definition: DZgn - Schist and paragneiss (Devonian to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 7740
          Enumerated_Domain_Value_Definition:
            OZc - Older carbonate rocks of the Nanielik antiform
            (Middle Ordovician to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 7741
          Enumerated_Domain_Value_Definition:
            OZc - Older carbonate rocks of the Nanielik antiform
            (Middle Ordovician to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 8601
          Enumerated_Domain_Value_Definition: PzZbs - Biotite schist (Paleozoic to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 8602
          Enumerated_Domain_Value_Definition: Dsq - Quartz-mica schist (Devonian)
        Enumerated_Domain:
          Enumerated_Domain_Value: 8603
          Enumerated_Domain_Value_Definition:
            PzZqs - Quartz-rich metasedimentary rocks (Paleozoic to
            Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 8604
          Enumerated_Domain_Value_Definition:
            PzZb - Metasedimentary rocks of Bluecloud Mountain
            (Paleozoic to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 8605
          Enumerated_Domain_Value_Definition: DZsc - Calcareous schist (Devonian to Proterozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 8607
          Enumerated_Domain_Value_Definition: DZsc - Calcareous schist (Devonian to Proterozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 8608
          Enumerated_Domain_Value_Definition: DZsc - Calcareous schist (Devonian to Proterozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 8611
          Enumerated_Domain_Value_Definition:
            PzZem - Metamorphic rocks of the Ernie Lake area (Paleozoic
            to Proterozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 8655
          Enumerated_Domain_Value_Definition:
            PzZcm - Metasedimentary and metavolcanic rocks, undivided
            (Paleozoic and Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 8661
          Enumerated_Domain_Value_Definition: PzZm - Mafic schist (Paleozoic? to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 8852
          Enumerated_Domain_Value_Definition: DZm - Metamorphic rocks (Devonian to Proterozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 9045
          Enumerated_Domain_Value_Definition: PzZg - Phyllite and graywacke (Paleozoic?)
        Enumerated_Domain:
          Enumerated_Domain_Value: 9060
          Enumerated_Domain_Value_Definition: Zg - Granitic orthogneiss (Proterozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 9300
          Enumerated_Domain_Value_Definition: Zam - Metamorphic rocks of Mt. Angayukaqsraq (Proterozoic)
        Enumerated_Domain:
          Enumerated_Domain_Value: 9325
          Enumerated_Domain_Value_Definition: PzZsr - Ruby schist (Paleozoic to Proterozoic?)
    Attribute:
      Attribute_Label: NSAMOD
      Attribute_Definition:
        NSAMOD is a character (8 10 C) item in the polygon attribute
        table.  It contains modifiers of the geologic unit.
      Attribute_Definition_Source: this data set
      Attribute_Domain_Values:
        Unrepresentable_Domain: HFS - contact metamorphism, hornfels
    Attribute:
      Attribute_Label: SOURCE
      Attribute_Definition:
        SOURCE is a character (6 8 C) item found in both the arc
        and polygon attribute tables.  The values are abbreviated
        codes representing the original source reference for the
        polygon or arc feature.  The format for SOURCE is
        XX###, wher XX is a two letter code for the 1:250,000
        scale quadrangle and ### is a three digit number (with
        leading zeros).  All source codes with '001' are
        unspecified sources for water and ice features, often paper
        topographic maps, and DRG or DLG files.
      Attribute_Definition_Source: this data set
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: AR003
          Enumerated_Domain_Value_Definition:
            Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew,
            Nora, in prep., Reconnaissance geologic map and digital
            data for the Yukon-Koyukuk basin, Alaska:  U.S. Geological
            Survey Scientific Investigations Series Map SIM-2909,
            scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: AR004
          Enumerated_Domain_Value_Definition:
            Till. A.B., Dumoulin, J.A., Harris, A.G., Moore, T.E.,
            Bleick, Heather, and Siwiec, Benjamin, in press, Bedrock
            geologic map of the southern Brooks Range, Alaska, and
            accompanying conodont data:  U.S. Geological Survey
            Scientific Investigations Map SIM-XXXX, scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: BM004
          Enumerated_Domain_Value_Definition:
            Till, A.B., Dumoulin, J.A., Harris, A.G., Moore, T.E.,
            Bleick, Heather, and Siwiec, Benjamin, in press, Bedrock
            geologic map of the southern Brooks Range, Alaska, and
            accompanying conodont data:  U.S. Geological Survey
            Scientific Investigations Map SIM-XXXX, scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: BT002
          Enumerated_Domain_Value_Definition:
            Patton, W.W., Jr., and Miller, T.P., 1973, Bedrock
            geologic map of Bettles and southern part of Wiseman
            quadrangles, Alaska:  U.S. Geological Survey Miscellaneous
            Field Studies Map MF-492, scale 1:250,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: BT003
          Enumerated_Domain_Value_Definition:
            Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew,
            Nora, in prep., Reconnaissance geologic map and digital
            data for the Yukon-Koyukuk basin, Alaska:  U.S. Geological
            Survey Scientific Investigations Series Map SIM-2909,
            scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: BT005
          Enumerated_Domain_Value_Definition:
            Till, A.B., Dumoulin, J.A., Harris, A.G., Moore, T.E.,
            Bleick, Heather, and Siwiec, Benjamin, in press, Bedrock
            geologic map of the southern Brooks Range, Alaska, and
            accompanying conodont data:  U.S. Geological Survey
            Scientific Investigations Map SIM-XXXX, scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: BV004
          Enumerated_Domain_Value_Definition: Wilson/Hults edits 8/22/2007
        Enumerated_Domain:
          Enumerated_Domain_Value: BV006
          Enumerated_Domain_Value_Definition:
            Till, A.B., Dumoulin, J.A., Harris, A.G., Moore, T.E.,
            Bleick, Heather, and Siwiec, Benjamin, in press, Bedrock
            geologic map of the southern Brooks Range, Alaska, and
            accompanying conodont data:  U.S. Geological Survey
            Scientific Investigations Map SIM-XXXX, scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: CH004
          Enumerated_Domain_Value_Definition:
            Till, A.B., Dumoulin, J.A., Harris, A.G., Moore, T.E.,
            Bleick, Heather, and Siwiec, Benjamin, in press, Bedrock
            geologic map of the southern Brooks Range, Alaska, and
            accompanying conodont data:  U.S. Geological Survey
            Scientific Investigations Map SIM-XXXX, scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: CS002
          Enumerated_Domain_Value_Definition:
            Brosge, W.P., and Reiser, H.N., 2000, Geology of the
            Christian quadrangle, Alaska:  U.S. Geological Survey
            Open-File Report 00-192, scale 1:250,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: CS003
          Enumerated_Domain_Value_Definition:
            Till, A.B., Dumoulin, J.A., Phillips, J.D., Stanley, R.G.,
            and Crews, Jesse, in prep., Generalized bedrock geologic
            map, Yukon flats region, east-central Alaska:  U.S.
            Geological Survey Scientific Investigations Map SIM-XXXX,
            pamphlet, 1 plate, scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: CS004
          Enumerated_Domain_Value_Definition:
            Till, A.B., Dumoulin, J.A., Harris, A.G., Moore, T.E.,
            Bleick, Heather, and Siwiec, Benjamin, in press, Bedrock
            geologic map of the southern Brooks Range, Alaska, and
            accompanying conodont data:  U.S. Geological Survey
            Scientific Investigations Map SIM-XXXX, scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: HU002
          Enumerated_Domain_Value_Definition:
            Patton, W.W., Jr., and Miller, T.P., 1966, Regional
            geologic map of the Hughes quadrangle, Alaska:  U.S.
            Geological Survey Miscellaneous Geologic Investigations
            Series Map I-459, scale 1:250,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: HU003
          Enumerated_Domain_Value_Definition:
            Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and  Shew,
            Nora, in prep., Reconnaissance geologic map and digital
            data for the Yukon-Koyukuk basin, Alaska:  U.S. Geological
            Survey Scientific Investigations Series Map  SIM-2909,
            scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: HU004
          Enumerated_Domain_Value_Definition:
            Till, A.B., Dumoulin, J.A., Harris, A.G., Moore, T.E.,
            Bleick, Heather, and Siwiec, Benjamin, in press, Bedrock
            geologic map of the southern Brooks Range, Alaska, and
            accompanying conodont data:  U.S. Geological Survey
            Scientific Investigations Map SIM-XXXX, scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: SE003
          Enumerated_Domain_Value_Definition:
            Karl, S.M., Dumoulin, J.A., Ellersieck, Inyo, Harris,
            A.G., and Schmidt, J.M., 1989, Preliminary geologic map
            of the Baird Mountains and part of the Selawik quadrangles,
            Alaska:  U.S. Geological Survey Open-File Report 89-551,
            65p., 1 sheet, scale 1:250,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: SE005
          Enumerated_Domain_Value_Definition:
            Till, A.G., Dumoulin, J.A., Harris, A.G., Moore, T.E.,
            Bleick, Heather, and Siwiec, Benjamin, in press, Bedrock
            geologic map of the southern Brooks Range, Alaska, and
            accompanying conodont data:  U.S. Geological Survey
            Scientific Investigations Map SIM-XXXX, scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: SH002
          Enumerated_Domain_Value_Definition:
            Patton, W.W., Jr., Miller,  T.P., and Tailleur, I.L., 1968,
            Regional geologic map of the Shungnak and southern part of
            the Ambler River quadrangles, Alaska:  U.S. Geological
            Survey Miscellaneous Geologic Investigations Map I-554,
            scale 1:250,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: SH004
          Enumerated_Domain_Value_Definition:
            Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew,
            Nora, in prep., Reconnaissance geologic map and digital
            data for the Yukon-Koyukuk basin, Alaska:  U.S. Geological
            Survey Scientific Investigations Series Map SIM-2909,
            scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: SH005
          Enumerated_Domain_Value_Definition:
            Till, A.B., Dumoulin, J.A., Harris, A.G., Moore, T.E.,
            Bleick, Heather, and Siwiec, Benjamin, in press, Bedrock
            geologic map of the southern Brooks Range, Alaska, and
            accompanying conodont data:  U.S. Geological Survey
            Scientific Investigations Map SIM-XXXX, scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: SP003
          Enumerated_Domain_Value_Definition:
            Patton, W.W., Jr., Wilson, F.H., Labay, K.A., and Shew,
            Nora, in prep., Reconniassance geologic map and digital
            data for the Yukon-Koyukuk basin, Alaska:  U.S. Geological
            Survey Scientific Investigations Map SIM-2909, scale
            1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: SP004
          Enumerated_Domain_Value_Definition:
            Till, A.B., Dumoulin, J.A., Harris, A.G., Moore, T.E.,
            Bleick, Heather, and Siwiec, Benjamin, in press, Bedrock
            geologic map of the southern Brooks Range, Alaska, and
            accompanying conodont data:  U.S. Geological Survey
            Scientific Investigations Map SIM-XXXX, scale 1:500,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: WI007
          Enumerated_Domain_Value_Definition:
            Till, A.B., Dumoulin, J.A., Harris, A.G., Moore, T.E.,
            Bleick, Heather, and Siwiec, Benjamin, in press, Bedrock
            geologic map of the southern Brooks Range, Alaska, and
            accompanying conodont data:  U.S. Geological Survey
            Scientific Investigations Map SIM-XXXX, scale 1:500,000.
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: arcs
      Entity_Type_Definition:
        Characteristics of the arc features in the geology
        coverages are coded in the arc attribute table.  Table
        <cov>.aat includes the following items:  ARC-CODE,
        ARC-PARA1, and SOURCE.  For explanation of SOURCE, see
        attribute definitions for polygons.
      Entity_Type_Definition_Source: this data set
    Attribute:
      Attribute_Label: ARC-CODE
      Attribute_Definition:
        ARC-CODE is a positive integer value (3 3 I) item in the
        arc attribute table.  Values range discontinuously from
        1 to 99.  Values match one-for-one with geologic features,
        such as stratigraphic boundary, fault, etc.   Some ARC-CODE
        features have additional modifiers in item ARC-PARA1.
      Attribute_Definition_Source: this data set
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 1
          Enumerated_Domain_Value_Definition: Stratigraphic or intrusive contact, location certain
        Enumerated_Domain:
          Enumerated_Domain_Value: 2
          Enumerated_Domain_Value_Definition: Stratigraphic or intrusive contact, location approximate
        Enumerated_Domain:
          Enumerated_Domain_Value: 3
          Enumerated_Domain_Value_Definition:
            Stratigraphic or intrusive contact, location inferred,
            queried
        Enumerated_Domain:
          Enumerated_Domain_Value: 4
          Enumerated_Domain_Value_Definition:
            Normal fault, location certain; if ARC-PARA1 = 1, then
            upthrown side is on right from origin
        Enumerated_Domain:
          Enumerated_Domain_Value: 5
          Enumerated_Domain_Value_Definition:
            Normal fault, location approximate, if ARC-PARA1 = 1, then
            upthrown side is on right from origin
        Enumerated_Domain:
          Enumerated_Domain_Value: 7
          Enumerated_Domain_Value_Definition: Shoreline or riverbank
        Enumerated_Domain:
          Enumerated_Domain_Value: 9
          Enumerated_Domain_Value_Definition: Boundary or altered zone or hornfels
        Enumerated_Domain:
          Enumerated_Domain_Value: 10
          Enumerated_Domain_Value_Definition: Thrust fault, location certain; teeth on right from origin
        Enumerated_Domain:
          Enumerated_Domain_Value: 11
          Enumerated_Domain_Value_Definition:
            Thrust fault, location approximate; teeth on right from
            origin
        Enumerated_Domain:
          Enumerated_Domain_Value: 30
          Enumerated_Domain_Value_Definition: Fault, sense of displacement unknown, location certain
        Enumerated_Domain:
          Enumerated_Domain_Value: 31
          Enumerated_Domain_Value_Definition: Fault, sense of displacement unknown, location approximate
        Enumerated_Domain:
          Enumerated_Domain_Value: 32
          Enumerated_Domain_Value_Definition:
            Fault, sense of displacement unknown, location inferred or
            queried
        Enumerated_Domain:
          Enumerated_Domain_Value: 52
          Enumerated_Domain_Value_Definition:
            Normal fault, concealed; if ARC-PARA1 = 1, then upthrown
            side is on right from origin
        Enumerated_Domain:
          Enumerated_Domain_Value: 53
          Enumerated_Domain_Value_Definition: Thrust fault, concealed; teeth on right from origin
        Enumerated_Domain:
          Enumerated_Domain_Value: 57
          Enumerated_Domain_Value_Definition: Concealed right lateral fault
        Enumerated_Domain:
          Enumerated_Domain_Value: 60
          Enumerated_Domain_Value_Definition: Concealed fault, sense of displacement unknown
        Enumerated_Domain:
          Enumerated_Domain_Value: 87
          Enumerated_Domain_Value_Definition: Right lateral fault, location certain
        Enumerated_Domain:
          Enumerated_Domain_Value: 88
          Enumerated_Domain_Value_Definition: Right lateral fault, location approximate
        Enumerated_Domain:
          Enumerated_Domain_Value: 99
          Enumerated_Domain_Value_Definition: Bounding line of coverage
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing address
        Address:
          MS 902
          Box 25286
          Denver Federal Center
        City: Lakewood
        State_or_Province: CO
        Postal_Code: 80225
        Country: USA
      Contact_Voice_Telephone: 1-888-ASK-USGS
  Resource_Description: Open-File Report 2008-XXXX
  Distribution_Liability:
    This world-wide web publication was prepared by an agency
    of the United States Government.  Neither the United States
    Government nor any agency thereof, nor any of their
    employees, makes any warranty, expressed or implied, or
    assumes any legal liability or responsibility for the
    accuracy, product, or process disclosed in this report, or
    represents that its use would not infringe privately
    owned rights.  Reference therein to any specific commercial
    product, process, or service by trade name, trademark,
    manufacturer, or otherwise does not necessarily constitute
    or imply its endorsement, recommendation, or favoring by
    the United States Government or any agency thereof.

    Although all data and software published on this web-site
    have been used by the USGS, no warranty expressed or
    implied, is made by the USGS as to the accuracy of the
    data and related materials and (or) the functioning
    of the software.  The act of distribution shall not
    constitute any such warranty, and no responsibility is
    assumed by the USGS in the use of this data, software,
    or related materials.
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: ARCE
        File_Decompression_Technique: zip files
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://pubs/usgs.gov/of/2008/XXXX
    Fees: There is no cost for the download of these digital files
Metadata_Reference_Information:
  Metadata_Date: 20080303
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
        Contact_Person: Nora B. Shew
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 4200 University Drive
        City: Anchorage
        State_or_Province: AK
        Postal_Code: 99508
        Country: USA
      Contact_Voice_Telephone: 907-786-7445
      Contact_Electronic_Mail_Address: nshew@usgs.gov
  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998