Identification_Information:
  Citation:
    Citation_Information:
      Originator: Mitchell W. Reynolds
      Originator: Theodore R. Brandt
      Publication_Date: 2000
      Title: Generalized Bedrock Geologic Map of the Helena Area, West-Central Montana
      Edition: 1.0
      Geospatial_Data_Presentation_Form: map
      Series_Information:
        Series_Name: USGS Water-Resources Investigations Report
        Issue_Identification: WRI-00-4212
      Publication_Information:
        Publication_Place: Denver, CO
        Publisher: U.S. Geological Survey
      Online_Linkage: http://geology.cr.usgs.gov/pub/wri/wri-00-4212/
      Larger_Work_Citation:
        Citation_Information:
          Originator: Joanna N. Thamke
          Originator: Mitchell W. Reynolds
          Publication_Date: 2000
          Title: Hydrology of Helena Area Bedrock, West-Central Montana, 1993-98 with a section on Geologic Setting and a Generalized Bedrock Geologic Map
          Edition: 1.0
          Geospatial_Data_Presentation_Form: map
          Series_Information:
            Series_Name: USGS Water-Resources Investigations Report
            Issue_Identification: WRI-00-4212
  Description:
    Abstract:
      The Generalized Bedrock Geologic Map of the Helena Area, West-Central Montana (plate 1 in the report) provides an intermediate-scale overview of bedrock in the Helena area.  The geologic map has been compiled at a scale of 1:100,000 from the most widely available sources of geologic map information (see index to geologic mapping on pl. 1).  That information has been updated by M.W. Reynolds for this report with more recent geologic mapping and field revision of published maps.  All well locations and all bedrock units penetrated during drilling have been confirmed on geologic maps at the largest scale available.  Source geologic maps are all at scales larger than 1:100,000 scale.  Care has been taken to ensure accurate representation of the original geology at the compilation scale.  However, positional accuracy of some features might be somewhat diminished at the smaller scale of the base map when compared with the original data source.  Also, line thicknesses for contacts and faults necessarily assume a greater width, relative to the real geologic feature, at the scale of the generalized map than on any original map.  The map is not intended for large-scale, site-specific detailed planning.
      Bedrock units throughout the Helena area are generally covered by young surficial deposits such as alluvium, colluvium, glacial debris, or windblown sediment.  Thickness of such deposits varies from veneers through which the underlying bedrock is clearly discernible to major thicknesses that conceal all underlying bedrock and structure.  Boundaries of major accumulations of surficial deposits are attributed separately from bedrock contacts.  These boundaries should not be considered precise at the map scale or at larger scales.  Boundaries shown may be less accurate positionally than bedrock contacts and faults because (1) surficial deposits commonly thin to a knife edge; (2)different mappers will interpret the edge differently when drawing a boundary; or (3) the original geologic map maker was concerned principally with bedrock units and structure and thus overlooked, or did not originally map as consistently, some surficial deposits.  Veneers of surficial sediment, when saturated, can be local sources of recharge to underlying bedrock. Use of the generalized map to define their distribution does not substitute for site specific mapping of such deposits.
      Specific knowledge is needed to determine the water-bearing properties of the geologic units at and surrounding a site because the units, including the igneous and metamorphic rocks, have internal differences in stratigraphy, composition, mineralogy and grain size or crystallinity.  These differences, together with structural imprints such as faults, folds, and the spacing, orientation, degree of openness of fractures, and extent and type of mineral filling in fractures and faults, all affect the ability of rocks to store and transmit water
    Purpose: To display the bedrock geology of the Helena Valley, Montana area and to provide sufficient geologic information for land-use and land-management decisions.
    Supplemental_Information:
      Map political location:  Jefferson, Lewis and Clark, and Powell Counties, Montana  Compilation scale 1:100,000
      Geospatial data files included in this data set:
      helena:  geologic units, faults, and other line features
      helenard:  USGS DLG highways and roads
      helenarr:  USGS DLG railroads
      helenact:  USGS DLG county boundaries
      helenahy:  USGS DLG hydrography
      helenapl:  BLM PLSS boundaries
      heltrlin:  electric transmission lines
      helctdiv:  continental divide boundary
      wpgcmykg.shd: This shadeset file defines the rgb values of colors assigned to polygons in the geologically themed coverage (see SYMBOL item).
      alcwrg.lin: This lineset file defines geologic line types in the geologically themed coverage.
      geoscamp1.lin: This lineset file defines thrust fault geologic line types not found in alcwrg.lin in the geologically themed coverage.

  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 2000
    Currentness_Reference: Publication date
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -112.375
      East_Bounding_Coordinate: -111.786
      North_Bounding_Coordinate: 46.792
      South_Bounding_Coordinate: 46.375
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: American Geological Institute Glossary of Geology 
      Theme_Keyword: geology
    Place:
      Place_Keyword_Thesaurus: Board of Geologic Names 
      Place_Keyword: USA
      Place_Keyword: Montana
      Place_Keyword: Jefferson County
      Place_Keyword: Lewis and Clark County
      Place_Keyword: Powell County
      Place_Keyword: Helena
      Place_Keyword: Helena Valley
  Access_Constraints: None
  Use_Constraints: None.  Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data.  These data are not to be used at scales greater than 1:100,000.
  Point_of_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Mitchell W. Reynolds
        Contact_Organization: U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing
        Address: P.O. Box 25046, MS 980
        Address: Denver Federal Center
        City: Denver
        State_or_Province: CO
        Postal_Code: 80225-0046
        Country: USA
      Contact_Voice_Telephone: 303-236-8007
  Browse_Graphic:
    Browse_Graphic_File_Name: http://geology.cr.usgs.gov/pub/wri/wri-00-4212/ wri-00-4212_print.pdf 
    Browse_Graphic_File_Description: graphic representation of map layout
    Browse_Graphic_File_Type: PDF
  Data_Set_Credit: The assistance of Janelle Luppen, who digitized the map and performed initial quality checks on the GIS database is gratefully acknowledged.
  Native_Data_Set_Environment:
    Windows_NT, 5.0, Intel
    ARC/INFO version 8.1.2

Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report: Data were entered and checked by the geologist that made the field observations.  The attributes of this geospatial data set consist of text identifiers and numeric codes that indicate the identity of the geologic unit or type of geologic feature, and determine how each feature is colored or symbolized.  To check attribute accuracy, a color check plot was visually compared to the geologist's original compilation.  Discrepancies between the digital geospatial dataset and the original analog compilation were corrected as needed.  Machine-created listings of unique attribute values were used to identify spelling errors or other inconsistencies, and corrections were made as needed. .  Automated (ArcInfo) routines were also used to check the databases for polygon label errors, line or point attribution errors, sliver polygons, dangling arcs, intersection errors, and projection information.  This map has been thoroughly reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature.
  Logical_Consistency_Report: Map elements were visually checked for overshoots, undershoots, duplicate features, polygon closure, and other errors by the author and by the GIS technician(s) that created the digital database.  Check plots of the map were reviewed by at least two other geologists for consistency with basic geologic principles and general conformity to USGS map standards.
  Completeness_Report: Data are complete: no features that could be displayed at the compilation scale of 1:100,000 were eliminated or generalized. The smallest area represented is approximately 477 square meters.  All geospatial database elements are attributed.  Unit properties are described in the text explanation. Digital base map coverages, which are not fully attributed, are included for the convenience of users.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: Lines were scanned from the base map using a large format Anatech Eagle scanner.  The resultant scanned image was edited, geo-registered and vectorized in LT4X software and subsequently imported into ArcInfo GIS software.  The ArcInfo coverage was given projection information and attributed. Most digitized positions on the map are estimated to have at least 40 m horizontal accuracy.
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Becraft, G.E.
          Originator: Pinckney, D.M.
          Originator: Rosenblum, Sam
          Title: Geology and mineral deposits of the Jefferson City quadrangle, Jefferson and Lewis and Clark Counties, Montana
          Publication_Date: 1963
          Series_Information:
            Series_Name: U.S. Geological Survey Professional Paper
            Issue_Identification: 428
      Source_Scale_Denominator: 48000
      Type_of_Source_Media: paper
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 1963
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: Becraft and others (1963)
      Source_Contribution: geologic data source

    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Bregman, M.L.
          Title: Structural geology of the Sheep Creek and Rattlesnake Mountain quadrangles, Lewis and Clark County, Montana
          Publication_Date: 1981
          Series_Information:
            Series_Name: Montana Bureau of Mines and Geology Geologic Map
            Issue_Identification: 26
      Source_Scale_Denominator: 24000
      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: Bregman (1981)
      Source_Contribution: geologic data source

    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Knopf, Adolf
          Title: Geology of the northern part of the Boulder bathylith and adjacent area, Montana
          Publication_Date: 1963
          Series_Information:
            Series_Name: U.S. Geological Survey Miscellaneous Investigations Map
            Issue_Identification: I-381
      Source_Scale_Denominator: 48000
      Type_of_Source_Media: paper
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 1963
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: Knopf (1963)
      Source_Contribution: geologic data source
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Reynolds, M.W.
          Originator: Hays, W.H.
          Title: Geologic map of the Nelson quadrangle, Lewis and Clark County, Montana 
          Publication_Date: 2002
          Series_Information:
            Series_Name: U.S. Geological Survey Geologic Investigations Map
            Issue_Identification: I-2774
      Type_of_Source_Media: paper
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 2002
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: Reynolds and Hays (2002)
      Source_Contribution: geologic data source
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Robinson, G.D.
          Originator: McCallum, M.E.
          Originator: Hays, W.H.
          Title: Geologic map of the Upper Holter Lake quadrangle
          Publication_Date: 1969
          Series_Information:
            Series_Name: U.S. Geological Survey Geologic Quadrangle Map
            Issue_Identification: GQ-840
      Source_Scale_Denominator: 24000
      Type_of_Source_Media: paper
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 1969
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: Robinson and others (1969)
      Source_Contribution: geologic data source
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Ruppel, E.T.
          Title: Geology of the Basin quadrangle, Jefferson, Lewis and Clark, and Powell Counties, Montana
          Publication_Date: 1963
          Series_Information:
            Series_Name: U.S. Geological Survey Bulletin
            Issue_Identification: 1151
      Source_Scale_Denominator: 48000
      Type_of_Source_Media: paper
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 1963
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: Ruppel (1963)
      Source_Contribution: geologic data source
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Smedes, H.W.
          Title: Geology and igneous petrology of the northern Elkhorn Mountains, Jefferson and Broadwater Counties, Montana
          Publication_Date: 1966
          Series_Information:
            Series_Name: U.S. Geological Survey Professional Paper
            Issue_Identification: 510
      Source_Scale_Denominator: 48000
      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: Smedes (1966)
      Source_Contribution: geologic data source
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Schmidt, R.G.
          Originator: Loen, J.S.
          Originator: Wallace, C.A.
          Originator: Mehnert, H.H.
          Title: Geology of the Elliston region, Powell and Lewis and Clark Counties, Montana
          Publication_Date: 1994
          Series_Information:
            Series_Name: U.S. Geological Survey Bulletin
            Issue_Identification: 2045
      Source_Scale_Denominator: 62500
      Type_of_Source_Media: paper
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 1994
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: Schmidt and others (1994)
      Source_Contribution: geologic data source
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Wallace, C.A.
          Title: Generalized geologic map of the Butte 1 x 2  quadrangle, Montana
          Publication_Date: 1987
          Series_Information:
            Series_Name: U.S. Geological Survey Miscellaneous Field Studies Map
            Issue_Identification: MF-1925
      Source_Scale_Denominator: 250000
      Type_of_Source_Media: paper
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 1987
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: Wallace and comp. (1987)
      Source_Contribution: geologic data source
    Process_Step:
      Process_Description: scan mylar original artwork into tiff file
      Process_Date: 19990129
    Process_Step:
      Process_Description: Registration of tiff and vectorization in LT4X
      Process_Date: 19990210
    Process_Step:
      Process_Description: Import as Arc/Info coverage; project into UTM
      Process_Date: 19990303
    Process_Step:
      Process_Description: Transfer attributes from existing fault coverage to new coverage
      Process_Date: 19990322
    Process_Step:
      Process_Description: Download and append PLSS data
      Process_Date: 19990312
    Process_Step:
      Process_Description: Download, convert and append DLG data of hydrography, roads, railroads & misc. transportation
      Process_Date: 19990314
    Process_Step:
      Process_Description: Digitize new line work and insert as correction to original artwork
      Process_Date: 19990316
    Process_Step:
      Process_Description: Append boundary lines, build polygon coverage, and begin attribution of polygons
      Process_Date: 19990609
    Process_Step:
      Process_Description: Append rock unit descriptions and full descriptive text to polygon coverage
      Process_Date: 20010620
    Process_Step:
      Process_Description: Run data integrity checks and attribute arcs and label points as necessary
      Process_Date: 20010621
    Process_Step:
      Process_Description: Scan published map and generate browse graphic
      Process_Date: 20010625
    Process_Step:
      Process_Description: Metadata created using FGDCMETA.AML ver. 1.2 05/14/98 and MP version 2.7.28
      Process_Date: 20010625
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: 12
          Transverse_Mercator:
            Scale_Factor_at_Central_Meridian: 0.999600
            Longitude_of_Central_Meridian: -111.000000
            Latitude_of_Projection_Origin: 00000.00000
            False_Easting: 500000.000000
            False_Northing: 00000.000000
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: coordinate pair
        Coordinate_Representation:
          Abscissa_Resolution: 5
          Ordinate_Resolution: 5
        Planar_Distance_Units: Meters
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1927
      Ellipsoid_Name: Clarke 1866
      Semi-major_Axis: 6378206.4
      Denominator_of_Flattening_Ratio: 294.98
Entity_and_Attribute_Information:
  Overview_Description:
    Entity_and_Attribute_Overview:
      DATABASE STRUCTURE - ARC/INFO ====================================
      The database of the map consists of one coverage, including corresponding info files:
      This database structure is more fully described in USGS OFR 99-438.  This GIS database includes related look-up tables, which store detailed attribute information. Arc/Info relates for each coverage are saved in a file named <covername>.rel. Use the RELATE command with the restore argument at the arc prompt to make the relates active. Alternatively, in Arctools, use the Relate environment: open dialog in the Manage - Relates flyout menu under the Arctools menu to make the relates active.
      helena coverage: contains all contact lines and label points for each geologic polygon.  In the helena.pat INFO file UNIT item indicates the numeric code of the rock unit related to the detailed unit description found in the snedgeo.ru lookup table.  The LABEL item indicates the rock unit label (abbreviation) used to label the unit on the map. The DESC item contains the formal or informal unit name.  The SOURCE item contains the numeric code used to identify the data source for the rock unit.  The SYMBOL item contains the shadeset symbol number used by ArcInfo to plot a filled/shaded polygon. The symbol numbers for this item refer to the wpgcmykg.shd shadeset.  The PATTERN item contains the shadeset symbol number used by ArcInfo to plot a hatchured polygon.  The symbol numbers for this item refer to the helena4.shd shadeset.
      In the coverage's helena.aat INFO file the NAME item contains the name given to the structural feature. The SOURCE item contains the numeric code used to identify the data source for the structural feature. The SYMBOL item contains the lineset symbol number used by ArcInfo to plot a line. The symbol numbers in this coverage refer to the alcwrg.lin and geoscamp1.lin linesets.  All symbol numbers reference the alcwrg.lin lineset except those coded 113 and 116, which reference the geoscamp1.lin lineset.
      In the coverage's helena.ref INFO file the SOURCE item lists the numeric code used to identify the data source. The scale item lists the scale of the source map. (This value is the denominator of the proportional fraction that identifies the scale of the map that was digitized or scanned to produce the digital map.) The AUTHORS item lists the author(s) or compiler(s) of source map entered as last name, first name or initial, and middle initial. The YEAR item lists the source (map) publication date. The REFERENCE item lists the remainder of the reference in USGS reference format.
      In the coverage's helena.ru INFO file the UNIT item lists numeric code used to identify the rock unit. This item also occurs in helena.pat.  The LABEL item lists the rock unit label (abbreviation) used to label the unit on the map.  The DESC item lists the formal or informal unit name.  The DESC1, DESC2, and DESC3 items list the full descriptive text for each formal or informal unit.
      helctdiv coverage: contains the portion of the U.S. Continental Divide line which does not run coterminous with the Lewis and Clark/Powell County boundary line.  This line was digitized from a U.S. Geological Survey 1:100,000 scale topographic base map.
      In the coverage's helctdiv.aat INFO file the SOURCE item contains the numeric code used to identify the data source for the feature.
      helenact coverage: contains county boundary lines derived from U.S. Geological Survey 1:100,000 scale Digital Line Graph data.
      In the coverage's helenact.aat INFO file the SOURCE item contains the numeric code used to identify the data source for the feature.
      helenahy coverage: contains hydrographic lines derived from U.S. Geological Survey 1:100,000 scale Digital Line Graph data.
      In the coverage's helenahy.aat INFO file the SOURCE item contains the numeric code used to identify the data source for the feature.
      helenapl coverage: contains U.S. Public Land Survey lines derived from U.S. Bureau of Land Management 1:100,000 scale data.
      In the coverage's helenapl.aat INFO file the SOURCE item contains the numeric code used to identify the data source for the feature.
      helenard coverage: contains highway and road transportation lines derived from U.S. Geological Survey 1:100,000 scale Digital Line Graph data
      In the coverage's helenard.aat INFO file the SOURCE item contains the numeric code used to identify the data source for the feature..
      helenarr coverage: contains railroad tranportation lines derived from U.S. Geological Survey 1:100,000 scale Digital Line Graph data
      In the coverage's helenarr.aat INFO file the SOURCE item contains the numeric code used to identify the data source for the feature.

      The INFO structure of these files is listed below:
      >
      >HELENA.PAT:
      >
      >COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
      >    1  AREA                   8    18     F      5
      >    9  PERIMETER              8    18     F      5
      >   17  HELENA#                4     5     B      -
      >   21  HELENA-ID              4     5     B      -
      >   25  UNIT                   4     4     I      -
      >   29  SOURCE                 3     3     I      -
      >   32  LABEL                 10    10     C      -
      >   42  DESC                 100   100     C      -
      >  142  SYMBOL                 3     3     I      -
      >  145  PATTERN                3     3     I      -
      >
      >
      >HELENA.AAT:
      >
      >COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
      >    1  FNODE#                 4     5     B      -
      >    5  TNODE#                 4     5     B      -
      >    9  LPOLY#                 4     5     B      -
      >   13  RPOLY#                 4     5     B      -
      >   17  LENGTH                 8    18     F      5
      >   25  HELENA#                4     5     B      -
      >   29  HELENA-ID              4     5     B      -
      >   33  NAME                  80    80     C      -
      >  113  SYMBOL                 3     3     I      -
      >  116  SOURCE                 3     3     I      -
      >
      >
      >HELENA.REF
      >COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
      >    1  SOURCE                 4     4     I      -
      >    5  SCALE                  8     8     I      -
      >   13  AUTHORS              200   200     C      -
      >  213  YEAR                   4     4     I      -
      >  217  REFERENCE            250   250     C      -
      >
      >
      >HELENA.RU:
      >
      >COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
      >    1  UNIT                   4     4     I      -
      >    5  DESC                 100   100     C      -
      >  105  DESC1                160   160     C      -
      >  265  DESC2                160   160     C      -
      >  425  DESC3                160   160     C      -
      >
      >
      >HELCTDIV.AAT:
      >
      >COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
      >    1  FNODE#                 4     5     B      -
      >    5  TNODE#                 4     5     B      -
      >    9  LPOLY#                 4     5     B      -
      >   13  RPOLY#                 4     5     B      -
      >   17  LENGTH                 8    18     F      5
      >   25  HELCTDIV#              4     5     B      -
      >   29  HELCTDIV-ID            4     5     B      -
      >   33  SOURCE                 4     4     I      -
      >
      >
      >HELENACT.AAT:
      >
      >COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
      >    1  FNODE#                 4     5     B      -
      >    5  TNODE#                 4     5     B      -
      >    9  LPOLY#                 4     5     B      -
      >   13  RPOLY#                 4     5     B      -
      >   17  LENGTH                 8    18     F      5
      >   25  HELENACT#              4     5     B      -
      >   29  HELENACT-ID            4     5     B      -
      >   33  SOURCE                 4     4     I      -
      >
      >
      >HELENAHY.AAT:
      >
      >COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
      >    1  FNODE#                 4     5     B      -
      >    5  TNODE#                 4     5     B      -
      >    9  LPOLY#                 4     5     B      -
      >   13  RPOLY#                 4     5     B      -
      >   17  LENGTH                 8    18     F      5
      >   25  HELENAHY#              4     5     B      -
      >   29  HELENAHY-ID            4     5     B      -
      >   33  SOURCE                 4     4     I      -
      >
      >
      >HELENAPL.AAT:
      >
      >COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
      >    1  FNODE#                 4     5     B      -
      >    5  TNODE#                 4     5     B      -
      >    9  LPOLY#                 4     5     B      -
      >   13  RPOLY#                 4     5     B      -
      >   17  LENGTH                 8    18     F      5
      >   25  HELENAPL#              4     5     B      -
      >   29  HELENAPL-ID            4     5     B      -
      >   33  SOURCE                 4     4     I      -
      >
      >
      >HELENARD.AAT:
      >
      >COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
      >    1  FNODE#                 4     5     B      -
      >    5  TNODE#                 4     5     B      -
      >    9  LPOLY#                 4     5     B      -
      >   13  RPOLY#                 4     5     B      -
      >   17  LENGTH                 8    18     F      5
      >   25  HELENARD#              4     5     B      -
      >   29  HELENARD-ID            4     5     B      -
      >   33  SOURCE                 4     4     I      -
      >
      >
      >HELENARR.AAT:
      >
      >COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
      >    1  FNODE#                 4     5     B      -
      >    5  TNODE#                 4     5     B      -
      >    9  LPOLY#                 4     5     B      -
      >   13  RPOLY#                 4     5     B      -
      >   17  LENGTH                 8    18     F      5
      >   25  HELENARR#              4     5     B      -
      >   29  HELENARR-ID            4     5     B      -
      >   33  SOURCE                 4     4     I      -

      >Unique item values in helena.pat
      >UNIT    LABEL          DESC
      >1    No bedrock    No bedrock data
      >2    POMIs         Pliocene(?) and Miocene sedimentary rocks
      >3    OGv           Oligocene volcanic rocks
      >4    OGvt          Oligocene volcanic rocks (tuffaceous)
      >5    OGs           Oligocene sedimentary rocks
      >6    EOv           Eocene volcanic rocks
      >7    Kg            Cretaceous intrusive rocks, mainly granitic
      >8    Kev           Elkhorn Mountains Volcanics
      >9    Kck           Upper and Lower Cretaceous sedimentary rocks
      >10   Jme           Jurassic sedimentary rocks
      >11   PIPqa         Permian and Pennsylvanian sedimentary rocks
      >12   Mb            Big Snowy Group
      >13   Mml           Madison Group
      >14   Dtj           Three Forks Formation and Jefferson Formation, undivided
      >15   Cc            Upper and Middle Cambrian carbonate rocks
      >16   Ccl           Middle Cambrian clastic rocks
      >17   Zg            Intrusive rocks
      >18   Ybo           Bonner Quartzite
      >19   Yms           Mount Shields Formation
      >20   Yss           Shepard and Snowslip Formations, undivided
      >21   Yhe           Helena and Empire Formations, undivided
      >22   Ys            Spokane Formation
      >23   Yg            Greyson Formation
      >24   Open water    Significant water bodies
      >Unique item values in helena.aat
      >SYMBOL     NAME
      >1     Fault - Certain
      >3     Fault - Approximately located
      >5     Fault - Concealed
      >25    Map boundary
      >35    Contact - Between exposed bedrock and bedrock concealed by Quaternary deposits
      >49    Contact - Certain
      >51    Contact - Approximately located
      >113   Thrust fault - Certain
      >116   Thrust fault - Concealed
      >525   Water body
      >725   Contact - Scratch boundary
      >
    Entity_and_Attribute_Detail_Citation: http://wrgis.wr.usgs.gov/open-file/of99-438/
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing address
        Address: Central Publications Group
        Address: MS 902, Box 25046 DFC
        City: Lakewood
        State_or_Province: CO
        Postal_Code: 80225-0046
        Country: USA
      Contact_Voice_Telephone: 303-236-5486
  Distribution_Liability: Although these digital spatial data have been subjected to rigorous review and are substantially complete, they are released on the condition that neither the USGS nor the United States Government may be held liable for any damages resulting from their authorized or unauthorized use.
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: ARCE, SHP
        Format_Version_Number: created with ArcInfo v. 8.1.2
        File_Decompression_Technique:
          .tar.gz - UNIX gzip-compressed TAR file (ARCE and SHP files) - use GNU zip and TAR
          .zip - self-extracting Windows ZIP archive (ARCE and SHP files) - unzip the file to extract
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://geology.cr.usgs.gov/pub/wri/wri-00-4212/
    Fees: none
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing address
        Address: USGS Information Services
        Address: PO Box 25286
        Address: Denver Federal Center
        City: Denver
        State_or_Province: CO
        Postal_Code: 80225
        Country: USA
      Contact_Voice_Telephone: (888) ASK-USGS
  Resource_Description: WRI-00-4212
  Distribution_Liability: none
  Standard_Order_Process:
    Non-digital_Form: Available as a printed volume with 3 plates.
    Fees: For current prices of USGS information products, please see http://mapping.usgs.gov/esic/prices/
Metadata_Reference_Information:
  Metadata_Date: 20010625
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
        Contact_Person: Theodore R. Brandt
      Contact_Address:
        Address_Type: mailing
        Address: P.O. Box 25046, MS 980, Denver Federal Center
        City: Denver
        State_or_Province: CO
        Postal_Code: 80225-0046
        Country: USA
      Contact_Voice_Telephone: 303-236-1901
      Contact_Electronic_Mail_Address: tbrandt@usgs.gov
  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
  Metadata_Access_Constraints: none
  Metadata_Use_Constraints: none