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