Identification_Information: Citation: Citation_Information: Originator: Mitchell W. Reynolds Originator: Theodore R. Brandt Publication_Date: 2006 Title: Preliminary Geologic Map of the Townsend 30' x 60' Quadrangle, Montana Edition: version 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Map Issue_Identification: OF 2006-1138 Publication_Information: Publication_Place: Denver, Colorado, U.S.A. Publisher: United States Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2006/1138/ Description: Abstract: The geologic map of the Townsend quadrangle, scale 1:100,000, was made as part of the Montana Investigations Project to provide new information on the stratigraphy, structure, and geologic history of this geologically complex area in west-central Montana. The quadrangle encompasses about 4,200 square km (1,640 square mi). Purpose: The geologic map of the Townsend quadrangle, Montana, provides a summary of new and selected existing geologic information for public use and use by Federal, State, and local governmental agencies for land-use planning, including assessment of natural resources and natural hazards and recreational potential, and for land-use management The geologic map is an element in the cooperative program between the State of Montana and the U.S. Geological Survey to produce 1:100,000-scale geologic map coverage for the entire State. Supplemental_Information: Coverages included in this geospatial database: towngeo: polygon coverage of geologic units and faults townfold: line coverage of geologic fold axes towndike: line coverage of dikes and sills townpts: strike and dip measurements and other point features townwell: point coverage of drill hole data Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2006 Currentness_Reference: publication date Status: Progress: Planned Maintenance_and_Update_Frequency: formal USGS SIM publication planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -112.0000000 East_Bounding_Coordinate: -111.0000000 North_Bounding_Coordinate: 46.50000000 South_Bounding_Coordinate: 46.00000000 Keywords: Theme: Theme_Keyword_Thesaurus: American Geological Institute Glossary of Geology Theme_Keyword: Geologic map Theme_Keyword: Bald Butte fault zone Theme_Keyword: Basin and range extension Theme_Keyword: Basin and range faults Theme_Keyword: Basin and Range province Theme_Keyword: Belt Supergroup Theme_Keyword: Big Belt Mountains anticlinorium Theme_Keyword: Big Belt Mountains frontal fault zone Theme_Keyword: Boulder batholith Theme_Keyword: Boulder River Valley frontal faults Theme_Keyword: Cenozoic basin deposits Theme_Keyword: Cenozoic faulting Theme_Keyword: Cordillera fold and thrust belt Theme_Keyword: Crow Creek fault zone Theme_Keyword: Devils Fence anticline Theme_Keyword: Early Cambrian – Neoproterozoic unconformity Theme_Keyword: Earthquakes Theme_Keyword: Elkhorn Mountains caldera Theme_Keyword: Elkhorn Mountains mining district Theme_Keyword: Elkhorn Mountains volcanic complex Theme_Keyword: Francis syncline Theme_Keyword: Hassel mining district Theme_Keyword: Intermountain seismic belt Theme_Keyword: Late Cretaceous volcanism and plutonism Theme_Keyword: Limestone deposits Theme_Keyword: Limestone Hills anticline Theme_Keyword: Lombard thrust fault Theme_Keyword: Maudlow basin Theme_Keyword: Maudlow fault Theme_Keyword: Mesozoic unconformities Theme_Keyword: Metallic mineral occurrences, west - central Montana Theme_Keyword: Morgan fault Theme_Keyword: Mount Edith pluton Theme_Keyword: Norcen - Balcron Kimpton Ranch 11 - 1 dry hole Theme_Keyword: Paleozoic unconformities Theme_Keyword: Pleistocene glacial deposits Theme_Keyword: Radersburg mining district Theme_Keyword: Slim Sam Stock Place: Place_Keyword_Thesaurus: U.S. Board of Geographic Names (BGN) Geographic Names Information System (GNIS) Place_Keyword: USA Place_Keyword: United States of America Place_Keyword: Montana Place_Keyword: Alhambra Place_Keyword: Battle Mountain Place_Keyword: Beaver Creek Place_Keyword: Bedford Place_Keyword: Big Belt Mountains Place_Keyword: Big Birch Creek Place_Keyword: Boulder River Place_Keyword: Boulder Valley Place_Keyword: Bridger Range Place_Keyword: Broadwater County Place_Keyword: Bull Mountain Place_Keyword: Canyon Ferry Lake Place_Keyword: Canyon Ferry Reservoir Place_Keyword: Canyon Ferry State Game Management Area Place_Keyword: Clancy Place_Keyword: Clarkston Place_Keyword: Clarkston Valley Place_Keyword: Crow Creek Place_Keyword: Deep Creek Place_Keyword: Deerlodge National Forest Place_Keyword: Dry Creek Place_Keyword: Duck Creek Pass Place_Keyword: Elkhorn Place_Keyword: Elkhorn Creek Place_Keyword: Elkhorn Mountains Place_Keyword: Elkhorn Peak Place_Keyword: Francis Place_Keyword: Gallatin County Place_Keyword: Gallatin National Forest Place_Keyword: Grassy Mountain Place_Keyword: Greyson Creek Place_Keyword: Gurnett Creek Place_Keyword: Helena National Forest Place_Keyword: Horseshoe Hills Place_Keyword: Indian Creek Place_Keyword: Jefferson County Place_Keyword: Limestone Hills Place_Keyword: Little Birch Creek Place_Keyword: Lombard Place_Keyword: Maudlow Place_Keyword: Maudlow Basin Place_Keyword: McClellan Creek Place_Keyword: Meagher County Place_Keyword: Missouri River, upper Place_Keyword: Mount Edith Place_Keyword: Parker Place_Keyword: Prickly Pear Creek Place_Keyword: Radersburg Place_Keyword: Ray Creek Place_Keyword: Sixmile Creek Place_Keyword: Sixteenmile Creek Place_Keyword: Skidway Place_Keyword: Sulphur Bar Creek Place_Keyword: Table Mountain Place_Keyword: Tizer Creek Place_Keyword: Toston Place_Keyword: Townsend Place_Keyword: Townsend Valley Place_Keyword: Wall Mountain Place_Keyword: Winston Access_Constraints: None Use_Constraints: None. Users of this geospatial database and geologic information derived there from should acknowledge the U.S. Geological Survey as the source of the data. Although software enables a user to display images at various scales, map data in this report should not 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 Address: MS 980, Box 25046 DFC City: Denver State_or_Province: CO Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: 303-236-8007 Contact_Facsimile_Telephone: 303-236-0214 Contact_Electronic_Mail_Address: mwreynol@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2006/1138/pdf/OFR-2006-1138_map.pdf Browse_Graphic_File_Description: graphic representation of map layout Browse_Graphic_File_Type: PDF Data_Set_Credit: Theodore Brandt, U.S. Geological Survey, served as primary author of the GIS database. Kenzie Turner, U.S. Geological Survey, assisted in the compilation of the map. Native_Data_Set_Environment: Windows_XP, Intel ARC/INFO version 9.1 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Data were entered and checked by the geologist that made the field observations and compilation. 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 the attribute accuracy, a color check plot was visually compared to the geologist's original compilation. Discrepancies between the digital geospatial data set 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. 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 authors and by the GIS technician(s) who created the digital database. 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. Check plots of the map were reviewed by another geologist and cartographer for consistency with basic geologic principles and general conformity to USGS mapping standards. Completeness_Report: Data are preliminary. No features that could be accurately represented at a scale of 1:100,000 were eliminated or generalized. The smallest area represented is approximately 95 square meters. All geospatial database elements are attributed. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Most digitized positions on the map that depict distinct contacts between rock formations in the field are estimated to be within 50 m of the actual contact on the land in most instances. Boundaries (lines) between Quaternary units (for example, terrace gravels) that correspond closely to distinct edges of landforms (for example, river terraces) are of comparable accuracy. Boundaries (lines) between some Quaternary units, such as eolian deposits and broad alluvial aprons, are approximately located within an indefinite gradational zone between them. Horizontal positional accuracy is tested by visual comparison of hard copy test plots to source maps or comparing locations of data on a computer monitor to other data layers in the same geographic area. The database contains no elevation data. Accuracy of these digital data indirectly depends on accuracy of the base maps on which the original source geologic maps were compiled. These base maps were made by the U.S. Geological Survey, which routinely checks them for compliance with the National Map Accuracy Standards. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Freeman, V. L. Originator: Ruppel, E. T. Originator: Klepper, M. R. Title: Geology of part of the Townsend Valley, Broadwater and Jefferson Counties, Montana Publication_Date: 1958 Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 1042-N Other_Citation_Details: p. 481-556 Source_Scale_Denominator: 48000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1958 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Freeman and others (1958) Source_Contribution: geologic data source modified using geologic mapping of Reynolds (unpublished mapping, 2005) Source_Information: Source_Citation: Citation_Information: Originator: Greenwood, W. R. Originator: Ludington, Steve Originator: Miller, W. R. Originator: Hanna, W. F. Title: Mineral Resources of the Elkhorn Wilderness Study area, Broadwater and Jefferson Counties, Montana Publication_Date: 1990 Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 1805 Other_Citation_Details: 37 p. Source_Scale_Denominator: 48000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1990 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Greenwood and others (1990) Source_Contribution: geologic data source modified using geologic mapping of Reynolds (unpublished mapping, 2005) Source_Information: Source_Citation: Citation_Information: Originator: Klepper, M. R. Originator: Ruppel, E. T. Originator: Freeman, V. L. Originator: Weeks, R. A. Title: Geology and mineral deposits, east flank of the Elkhorn Mountains, Broadwater County, Montana Publication_Date: 1971 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 665 Other_Citation_Details: 66 p. Source_Scale_Denominator: 48000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1971 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Klepper and others (1971) Source_Contribution: geologic data source modified using geologic mapping of Reynolds (unpublished mapping, 2005) Source_Information: Source_Citation: Citation_Information: Originator: Klepper, M. R. Originator: Weeks, R. A. Originator: Ruppel, E. T. Title: Geology of the southern Elkhorn Mountains, Jefferson and Broadwater Counties, Montana Publication_Date: 1957 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 292 Other_Citation_Details: 82 p. Source_Scale_Denominator: 48000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1957 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Klepper and others (1957) Source_Contribution: geologic data source modified using geologic mapping of Reynolds (unpublished mapping, 2005) Source_Information: Source_Citation: Citation_Information: Originator: Nelson, W. H. Title: Geology of the Duck Creek Pass quadrangle, Montana Publication_Date: 1963 Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 1121-J Other_Citation_Details: p. J1-J56 Source_Scale_Denominator: 62500 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: Nelson (1963) Source_Contribution: geologic data source modified using geologic mapping of Reynolds (unpublished mapping, 2005) Source_Information: Source_Citation: Citation_Information: Originator: Reynolds, M. W. Title: unpublished detailed geologic mapping of Mt. Edith, Alkali Lake, Sulphur Bar Creek, Butte Mountain, and parts of Clancy 7.5’ quadrangles, Montana Publication_Date: unpublished material Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2005 Source_Currentness_Reference: mapping completion date Source_Citation_Abbreviation: Reynolds (unpublished mapping, 2005) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Reynolds, M W. Title: reconnaissance and local detailed geologic mapping within the Townsend 30' x 60' quadrangle, Montana Publication_Date: unpublished material Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2005 Source_Currentness_Reference: mapping completion date Source_Citation_Abbreviation: Reynolds (unpublished mapping, 2005) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Robinson, G. D. Title: Geologic map of the Toston quadrangle, southwestern Montana Publication_Date: 1967 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Geologic Investigations Map Issue_Identification: I-486 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1967 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Robinson (1967) Source_Contribution: geologic data source modified using geologic mapping of Reynolds (unpublished mapping, 2005) Source_Information: Source_Citation: Citation_Information: Originator: Skipp, B. A. Originator: Peterson, A. D. Title: Geologic map of the Maudlow quadrangle, southwestern Montana Publication_Date: 1965 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Geologic Investigations Map Issue_Identification: I-452 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1965 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Skipp and Peterson (1965) Source_Contribution: geologic data source modified using geologic mapping of Reynolds (unpublished mapping, 2005) Source_Information: Source_Citation: Citation_Information: Originator: Weeks, R. A. Title: Geologic map of the Bull Mountain area, Jefferson County, Montana Publication_Date: 1974 Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 74-354 Source_Scale_Denominator: 48,000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1974 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Weeks (1974) Source_Contribution: geologic data source Process_Step: Process_Description: The geology for the published paper map was compiled by Mitchell Reynolds, U.S. Geological Survey. Process_Date: 2004 Process_Step: Process_Description: The geologic database was compiled using ArcInfo. Initial digitization of map features was performed by U.S. Geological staff using authors 1:50,000-scale mylar compilation materials. Process_Date: 2004 Process_Step: Process_Description: Checkplots of the coverages were printed and checked against source materials for accuracy and completeness. The database information was checked visually, as well as by using various routines in ArcInfo, for accuracy and consistency. Process_Date: 2006 Process_Step: Process_Description: Metadata for the Geologic map of the Townsend 30' x 60' quadrangle, Montana mapping project were created by Theodore Brandt, U.S. Geological Survey. Process_Date: 2006 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 5 Ordinate_Resolution: 5 Planar_Distance_Units: METERS Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 12 Transverse_Mercator: Scale_Factor_at_Central_Meridian: .9999 Longitude_of_Central_Meridian: -111.0000 Latitude_of_Projection_Origin: 0.00 False_Easting: 500000.0000 False_Northing: 0.0000 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: The data are supplied in ArcInfo export format and ArcView shapefile format. DATABASE STRUCTURE - ArcInfo ==================================== This GIS database includes related look-up tables, which store detailed attribute information. This database structure is more fully described in USGS OFR 99-438. The GIS database structure used in the database includes symbol and pattern items in coverage point, polygon (PAT), and arc (AAT) attribute tables for user convenience. ArcInfo relates for each coverage are saved in a file named .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. towngeo coverage: Contains all contact lines and label points for each geologic polygon. In the .pat INFO file the SOURCE item provides a numeric code used to identify the data source for the rock unit. Complete references for the sources listed are listed in the towngeo.ref file. The LABEL item indicates the rock unit label (abbreviation) used to label unit on map. The MLABEL item indicates the rock unit label from GeoAge version 1.2 font, using geologic age letter symbols associated with the age of the lithologic units (for example: Triassic, Pennsylvanian, Cambrian). The DESC item defines formal or informal unit name. The SYMBOL item contains the shadeset symbol number used by ArcInfo to plot a filled/shaded polygon. The symbol numbers in this item refer to the wpgcmykg.shd shadeset included with the dataset. The PATTERN item contains the pattern number used in the published version of the map. Patterns that correspond with the pattern numbers are displayed in USGS OFR 99-430. There is no ArcInfo shadeset that corresponds to these patterns. These patterns are not shown in the browse graphic of the map, but will shown in the planned SIM report. In the towngeo.aat INFO file, the LINECODE item provides a numeric code used to identify type of linear feature. Linecodes less than 100 are used for contacts and boundaries that are described in the towngeo.con file. Linecodes greater than 100 are used for structures that are described in the towngeo.str file. The NAME item lists the name given to the structural feature. The SOURCE item lists the numeric code used to identify the data source for the linear feature. The SYMBOL item lists the line symbol number used by ArcInfo to plot the line (symbol numbers refer to the geol_sfo.lin lineset). Complete references for the sources are listed in the towngeo.ref file. Related look-up table files are towngeo.con, towngeo.str, and towngeo.ref. In the towngeo.con INFO file, the LINECODE item indicates the numeric code (a value less than 100) used to identify type of contact or boundary. The SYMBOL item lists the line symbol number used by ArcInfo to plot the line (symbol numbers refer to the geol_sfo.lin lineset included with the dataset). The TYPE item lists the major type of line (for example, contact, State boundaries, lines of latitude and longitude used for neatlines). The MODIFIER item lists the line type modifier (that is, approximate, concealed, or gradational). No entry implies 'known.' The CERTAINTY item lists the degree of certainty of contact or boundary (that is, inferred or uncertain). No entry implies 'certain.' The DESC item lists the written description or explanation of the contact or boundary. In the towngeo.str INFO file, the LINECODE item indicates the numeric code (a value greater than 100) used to identify type of structure. The SYMBOL item lists the line symbol number used by ArcInfo to plot the line (symbol numbers refer to the geol_sfo.lin lineset included with the dataset). The TYPE item lists the major type of line (for example, fault or fold-axis). The HORIZONTAL item refers to the type of horizontal fault movement (for example, left-lateral or right-lateral). No entry implies 'unknown' or no strike-slip movement. The VERTICAL item refers to the type of vertical fault movement (for example, normal). No entry implies 'unknown' or no dip-slip movement. The FOLD item refers to the type of fold (for example, anticline or syncline). The PLUNGE item refers to the type of plunge on fold (that is, horizontal, plunging, plunging in, or plunging out). The ACCURACY item refers to the line type modifier indicating degree of accuracy (that is, approximately located, concealed, gradational). No entry implies 'certain.' The CERTAINTY item lists the degree of certainty of structure (that is, inferred, uncertain). No entry implies 'certain.' The DESC item lists the written description or explanation of the structure. The INFO structure of these files is listed below: >TOWNGEO.PAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 TOWNGEO# 4 5 B - > 21 TOWNGEO-ID 4 5 B - > 25 SOURCE 4 4 I - > 29 LABEL 10 10 C - > 39 MLABEL 10 10 C - > 49 DESC 140 140 C - > 189 SYMBOL 3 3 I - > 192 PATTERN 4 4 I - >TOWNGEO.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 TOWNGEO# 4 5 B - > 29 TOWNGEO-ID 4 5 B - > 33 LINECODE 3 3 I - > 36 NAME 100 100 C - > 136 SOURCE 4 4 I - > 140 SYMBOL 3 3 I - >TOWNGEO.CON: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 LINECODE 3 3 I - > 4 SYMBOL 3 3 I - > 7 TYPE 10 10 C - > 17 MODIFIER 20 20 C - > 37 CERTAINTY 15 15 C - > 52 DESC 100 100 C - >TOWNGEO.STR: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 LINECODE 3 3 I - > 4 SYMBOL 3 3 I - > 7 TYPE 10 10 C - > 17 HORIZONTAL 20 20 C - > 37 VERTICAL 20 20 C - > 57 FOLD 15 15 C - > 72 PLUNGE 15 15 C - > 87 ACCURACY 15 15 C - > 102 CERTAINTY 15 15 C - > 117 DESC 100 100 C - > TOWNGEO.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 - towndike coverage: Contains lines of dikes and sills In the towndike.aat INFO file, the LINECODE item provides a numeric code used to identify the type of linear feature. Linecodes are used for structures that are described in the towngeo.str file. The NAME item lists the name given to the structural feature. The SOURCE item lists the numeric code used to identify the data source for the linear feature. The SYMBOL item lists the line symbol number used by ArcInfo to plot the line (symbol numbers refer to the geol_sfo.lin lineset). Complete references for the sources are listed in the towndike.ref file. Related look-up table files are towndike.str, and towndike.ref. In the towndike.str INFO file, the LINECODE item indicates the numeric code (a value greater than 100) used to identify type of structure. The SYMBOL item lists the line symbol number used by ArcInfo to plot the line (symbol numbers refer to the geol_sfo.lin lineset included with the dataset). The TYPE item lists the major type of line (for example, fault or fold-axis). The HORIZONTAL item refers to the type of horizontal fault movement (for example, left-lateral or right- lateral). No entry implies 'unknown' or no strike-slip movement. The VERTICAL item refers to the type of vertical fault movement (for example, normal). No entry implies 'unknown' or no dip-slip movement. The FOLD item refers to the type of fold (for example, anticline or syncline). The PLUNGE item refers to the type of plunge on fold (that is, horizontal, plunging, plunging in, or plunging out). The ACCURACY item refers to the line type modifier indicating degree of accuracy (that is, approximately located, concealed, gradational). No entry implies 'certain.' The CERTAINTY item lists the degree of certainty of structure (that is, inferred, uncertain). No entry implies 'certain.' The DESC item lists the written description or explanation of the structure. >TOWNDIKE.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 TOWNDIKE# 4 5 B - > 29 TOWNDIKE-ID 4 5 B - > 33 LINECODE 3 3 I - > 36 NAME 80 80 C - > 116 SOURCE 4 4 I - > 120 SYMBOL 4 4 I - > >TOWNDIKE.STR: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 LINECODE 3 3 I - > 4 SYMBOL 3 3 I - > 7 TYPE 10 10 C - > 17 HORIZONTAL 20 20 C - > 37 VERTICAL 20 20 C - > >TOWNDIKE.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 - townfold coverage: Contains lines of geologic fold axes In the townfold.aat INFO file, the LINECODE item provides a numeric code used to identify the type of linear feature. Linecodes are used for structures that are described in the towngeo.str file. The NAME item lists the name given to the structural feature. The SOURCE item lists the numeric code used to identify the data source for the linear feature. The SYMBOL item lists the line symbol number used by ArcInfo to plot the line (symbol numbers refer to the geol_sfo.lin lineset). Complete references for the sources are listed in the townfold.ref file. Related look-up table files are townfold.str, and townfold.ref. In the townfold.str INFO file, the LINECODE item indicates the numeric code (a value greater than 100) used to identify type of structure. The SYMBOL item lists the line symbol number used by ArcInfo to plot the line (symbol numbers refer to the geol_sfo.lin lineset included with the dataset). The TYPE item lists the major type of line (for example, fault or fold-axis). The HORIZONTAL item refers to the type of horizontal fault movement (for example, left-lateral or right-lateral). No entry implies 'unknown' or no strike-slip movement. The VERTICAL item refers to the type of vertical fault movement (for example, normal). No entry implies 'unknown' or no dip-slip movement. The FOLD item refers to the type of fold (for example, anticline or syncline). The PLUNGE item refers to the type of plunge on fold (that is, horizontal, plunging, plunging in, or plunging out). The ACCURACY item refers to the line type modifier indicating degree of accuracy. (that is, approximately located, concealed, gradational). No entry implies 'certain.' The CERTAINTY item lists the degree of certainty of structure (that is, inferred, uncertain). No entry implies 'certain.' The DESC item lists the written description or explanation of the structure. >TOWNFOLD.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 TOWNFOLD# 4 5 B - > 29 TOWNFOLD-ID 4 5 B - > 33 LINECODE 3 3 I - > 36 NAME 80 80 C - > 116 SOURCE 4 4 I - > 120 SYMBOL 4 4 I - > >TOWNFOLD.STR: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 LINECODE 3 3 I - > 4 SYMBOL 3 3 I - > 7 TYPE 10 10 C - > 17 HORIZONTAL 20 20 C - > 37 VERTICAL 20 20 C - > >TOWNFOLD.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 - townpts coverage: Contains points recording site-specific observations and measurements, such as strike and dip of bedding In the townpts.pat INFO file, the PTTYPE item lists the type of point symbol (for example, strike and of inclined bedding). The SYMBOL item lists the marker symbol used by ArcInfo to identify the type of structural map symbol(symbol numbers refer to the geoscamp2.mrk markerset). The STRIKE item contains the strike of bedding as well as trend of fold axis, where applicable. Strike is an azimuthal angle. Measured in degrees from 0 to 360 in a clockwise direction from North, the STRIKE value also specifies the dip direction, where the dip direction is 90 degrees clockwise relative to the STRIKE. The DIP item contains the dip of bedding as well as plunge angles, where applicable. This value is an angle measured (in degrees from 0 to 90) down from the horizontal; thus a horizontal dip is 0 degrees and a vertical dip is 90 degrees. In the townpts.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. >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 TOWNPTS# 4 5 B - > 21 TOWNPTS-ID 4 5 B - > 25 PTTYPE 100 100 C - > 125 SYMBOL 3 3 I - > 128 STRIKE 3 3 I - > 131 DIP 3 3 I - > 134 SOURCE 4 4 I - > >TOWNPTS.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 - townwell coverage: Contains points recording site-specific measurements at well locations In the townwell.pat INFO file, the PTTYPE item labels the points as oil and gas test holes - showing operator and hole number. The SYMBOL item lists the point symbol number used by ArcInfo to plot the point (symbol numbers refer to the geoscamp2.mrk markerset). The WELLNAME item lists the recorded name of the well. The ELFT item lists the ground elevation in feet of the well. The TDFT item lists the total depth in feet of the well. Complete references for the sources are listed in the townwell.ref file. >TOWNWELL.PAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 TOWNWELL# 4 5 B - > 21 TOWNWELL-ID 4 5 B - > 25 PTTYPE 80 80 C - > 105 SYMBOL 4 4 I - > 109 WELLNAME 80 80 C - > 189 ELFT 5 5 I - > 194 TDFT 5 5 I - > 199 SOURCE 4 4 I - >TOWNWELL.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 - >Coding of LABEL and DESC attributes in the towngeo coverage: >LABEL | DESC >Cf | Flathead Sandstone (Middle Cambrian) >Cm | Meagher Limestone (Middle Cambrian) >Cp | Park Formation (Upper and Middle Cambrian) >Cpi | Pilgrim Formation (Upper Cambrian) >Cpp | Pilgrim Formation (Upper Cambrian)and Park Shale (Upper and Middle Cambrian), undivided >Cw | Wolsey Formation (Middle Cambrian) >Cwf | Wolsey Formation and Flathead Sandstone, undivided (Middle Cambrian) >DCm | Maywood Formation, locally includes some Cambrian rocks (Upper and Middle Devonian and Upper Cambrian) >Dj | Jefferson Formation (Upper Devonian) >Du | Upper and Middle Devonian rocks, undivided >EOql | Quartz latite (Eocene) >Je | Ellis Group, undivided (Jurassic) >Jm | Morrison Formation (Jurassic) >Jme | Morrison Formation and Ellis Group, undivided (Jurassic) >Kad | Andesite and diorite intrusive rocks (Late Cretaceous) >Kal | Alaskite and related felsic rocks (Late Cretaceous) >Kb | Basalt (Late Cretaceous) >Kbqm | Butte Quartz Monzonite (Late Cretaceous) >Kbqmf | Alaskite and related felsic rocks with Butte Quartz Monzonite (Late Cretaceous) >Kbqmm | Butte Quartz Monzonite, medium grained (Late Cretaceous) >Kc | Colorado Group, sedimentary rocks, undivided (Upper and Lower Cretaceous) >Kcl | Colorado Group, lower member (Lower Cretaceous) >Kcm | Colorado Group, middle part (Lower Cretaceous) >Kcu | Colorado Group, upper part (Upper and Lower Cretaceous) >Kd | Diorite porphyry (Late Cretaceous) >Ke | Eagle Sandstone (upper Cretaceous) >Kev | Elkhorn Mountains Volcanics, undivided (Upper Cretaceous) >Keva | Elkhorn Mountains Volcanics, ashflow tuff, present in Kevm (Upper Cretaceous) >Kevl | Elkhorn Mountains Volcanics, lower member (Upper Cretaceous) >Kevm | Elkhorn Mountains Volcanics, middle member (Upper Cretaceous) >Kevu | Elkhorn Mountains Volcanics, upper member (Upper Cretaceous) >Kg | Granite (Late Cretaceous) >Kgd | Granodiorite (Late Cretaceous) >Ki | Andesitic intrusive rocks related to Elkhorn Mountains Volcanics (Late Cretaceous) >Kk | Kootenai Formation (Lower Cretaceous) >Kl | Lamprophyre (Late Cretaceous) >Km | Monzonite (Late Cretaceous) >Kma | Maudlow Formation, unit a (Upper Cretaceous) >Kmb | Maudlow Formation, unit b (Upper Cretaceous) >Kmc | Maudlow Formation, unit c (Upper Cretaceous) >Kmd | Maudlow Formation, unit d (Upper Cretaceous) >Kme | Maudlow Formation, unit e (Upper Cretaceous) >Kmf | Maudlow Formation, unit f (Upper Cretaceous) >Kmg | Maudlow Formation, unit g (Upper Cretaceous) >Kmh | Maudlow Formation, unit h (Upper Cretaceous) >Kmo | Mafic igneous rocks, undivided (Late Cretaceous) >Kqd | Quartz diorite (Late Cretaceous) >Kqm | Quartz monzonite (Late Cretaceous) >Ks | Slim Sam Formation (Upper Cretaceous) >Ksd | Syenodiorite (Late Cretaceous) >Ktc | Telegraph Creek Formation (Upper Cretaceous) >Kwqm | Quartz monzonite of the Wilson Peak pluton (Late Cretaceous) >MDt | Three Forks Formation (Lower Mississippian and Upper Devonian) >MIOGf | Fort Logan Formation (Miocene and Oligocene) >MIOGs | Sedimentary rocks, undivided (Miocene and Oligocene) >MIOGs1 | Sedimentary rocks, orange-red conglomerate and sandstone tongue (Miocene and Oligocene) >MIOGs2 | Sedimentary rocks, sandstone and conglomerate tongue (Miocene and Oligocene) >MIOGsc | Sedimentary rocks, undivided (Miocene and Oligocene), covered with discontinuous veneer of gravel, sand, and loess >MIOGts | Vitric tuff and tuffaceous sedimentary rock (Miocene and Oligocene) >Mb | Big Snowy Group, undivided (Upper Mississippian) >Ml | Lodgepole Limestone (Lower Mississippian) >Mm | Mission Canyon Limestone (Upper and Lower Mississippian) >Mmu | Madison Group, undivided (Upper and Lower Mississippian) >OGb | Basalt (Oligocene) >OGr | Rhyolite, shallow intrusive bodies and flows (Oligocene) >OGs1 | Climbing Arrow Formation, lower part (Oligocene) >OGs2 | Climbing Arrow Formation, upper part (Oligocene) >OGs3 | Dunbar Creek Formation (Oligocene) >PMab | Amsden Formation (Pennsylvanian) and Big Snowy Group (Upper Mississippian), undivided >POMIs | Sedimentary rocks, undivided (Pliocene and Miocene) >PPpq | Phosphoria Group (Permian) and Quadrant Formation (Pennsylvanian), undivided >Pa | Amsden Formation (Pennsylvanian) >Pp | Phosphoria Group (Permian) >Pq | Quadrant Formation (Pennsylvanian) >QTa | Older alluvium (Pleistocene and Pliocene(?)) >QTb | Basalt (Pleistocene(?) or Pliocene(?)) >QTg | Older gravel (Pleistocene or Pliocene) >QTp | Older pediment gravel, undivided (Pleistocene or Pliocene) >QTp1 | Older pediment gravel, lower level where two levels of gravel are adjacent (Pleistocene or Pliocene) >QTp2 | Older pediment gravel, upper level overlying rocks of Miocene or older age (Pleistocene and Pliocene) >Qa | Alluvium (Holocene) >Qac | Alluvium and colluvium, undivided (Holocene) >Qag | Alluvium and glacial till, undivided (Holocene and Pleistocene) >Qbg | Boulder gravel (Holocene and Pleistocene) >Qc | Colluvium (Holocene) >Qgt | Older glacial till, undivided (Holocene and Pleistocene) >Qgtc | Older glacial till and associated colluvium (Pleistocene) >Qgto | Glacial till, older till where more than one age of till is recognized (Pleistocene) >Qgty | Glacial till, younger till where more than one age of till is recognized (Pleistocene) >Ql | Landslide deposit (Holocene and Pleistocene) >Qoa | Old alluvium (Holocene and Pleistocene) >Qog | Old gravel (Holocene and Pleistocene) >Qp | Pediment gravel (Pleistocene) >Qpw | Pediment gravel with veneer of windblown sand and silt (Pleistocene) >Qt | Terrace gravel (Holocene and Pleistocene) >Tl | Lamprophyre (Tertiary(?)) >Water | Open water >Ye | Empire Formation (Mesoproterozoic) >Yg | Greyson Formation, undivided (Mesoproterozoic) >Ygl | Greyson Formation, lower member (Mesoproterozoic) >Ygm | Greyson Formation, middle member (Mesoproterozoic) >Ygu | Greyson Formation, upper member (Mesoproterozoic) >Yl | Lahood Formation (Mesoproterozoic) >Yn | Newland Formation, undivided (Mesoproterozoic) >Ynl | Newland Formation, lower part (Mesoproterozoic) >Ynu | Newland Formation, limestone-bearing upper part (Mesoproterozoic) >Ys | Spokane Formation (Mesoproterozoic) >Zd | Diorite (Neoproterozoic) >af | Artificial fill >dt | Dredge or placer tailings >Coding of LINECODE and NAME attributes in the towngeo coverage: >LINECODE | NAME >1 | Contact - Certain >2 | Contact - Approximately located >3 | Contact - Concealed >5 | Contact - Scratch boundary >41 | Shoreline >81 | Map boundary >101 | Fault - Certain >102 | Fault - Approximately located >103 | Fault - Concealed >105 | Fault - Approximately located, queried >111 | Normal fault - Certain >112 | Normal fault - Approximately located >113 | Normal fault - Concealed >141 | Strike-slip fault, left-lateral offset - Certain >151 | Strike-slip fault, right-lateral offset - Certain >161 | Reverse fault - Certain >162 | Reverse fault - Approximately located >163 | Reverse fault - Concealed >167 | Reverse fault - Inferred >171 | Thrust fault - Certain >172 | Thrust fault - Approximately located >173 | Thrust fault - Concealed >177 | Thrust fault - Inferred >181 | Detachment fault - Certain >183 | Detachment fault - Concealed >211 | Strike-slip fault, left-lateral offset - Certain (vertical motion) >212 | Strike-slip fault, left-lateral offset - Approximately located (vertical motion) >213 | Strike-slip fault, left-lateral offset - Concealed (vertical motion) >221 | Strike-slip fault, right-lateral offset - Certain (vertical motion) >222 | Strike-slip fault, right-lateral offset - Approximately located >251 | Strike-slip fault, right-lateral offset - Certain (normal motion) >252 | Strike-slip fault, right-lateral offset - Approximately located (normal motion) >253 | Strike-slip fault, right-lateral offset - Concealed (normal motion) >536 | Normal fault - Inferred >537 | Fault - Inferred >551 | Fault – Inferred from gravity survey >560 | Fault – Inferred from aeromagnetic survey >Coding of LINECODE and NAME attributes in the townfold coverage: >LINECODE | NAME >401 | Anticline - Certain >402 | Anticline - Approximately located >403 | Anticline - Concealed >404 | Plunging anticline - Certain >405 | Plunging anticline - Approximately located >406 | Plunging anticline - Concealed >413 | Syncline - Certain >414 | Syncline - Approximately located >415 | Syncline - Concealed >416 | Plunging syncline - Certain >417 | Plunging syncline - Approximately located >418 | Plunging syncline - Concealed >437 | Overturned anticline - Certain >438 | Overturned anticline - Approximately located >439 | Overturned anticline - Concealed >440 | Overturned syncline - Certain >441 | Overturned syncline - Approximately located >442 | Overturned syncline - Concealed >533 | Anticline - Inferred, queried >534 | Syncline - Inferred, queried >539 | Inverted anticline - Approximately located >541 | Inverted anticline - Concealed >542 | Inverted syncline - Certain >543 | Inverted syncline - Approximately located >545 | Inverted syncline - Concealed >550 | Syncline - Inferred >Coding of LINECODE and NAME attributes in the towndike coverage: >LINECODE | NAME >512 | Dike or sill Auxiliary files: geol_sfo.lin: This lineset file defines geologic line types in the geologically themed coverages. wpgcmykg.shd: This shadeset file defines the cmyk values of colors assigned to polygons in the geologically themed coverages. town100r.tif: A geo-registered raster file of the USGS Townsend, Montana 1:100,000 scale base map. OFR-2006-1138_map.pdf: A print-optimized file for viewing and printing a graphics version of plate 1 of the map and accessory elements using Adobe Acrobat viewing software (version 7.0). 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 Address: Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 303-236-5486 Contact_Electronic_Mail_Address: webmaster@geology.cr.usgs.gov Resource_Description: Open-File Report 1138 Distribution_Liability: none Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE,SHP Format_Version_Number: 9.1 Format_Version_Date: 2005 File_Decompression_Technique: GZIP TAR archive, In UNIX use the command "gunzip -c | tar xvf .tar" In Windows, use WinZip (http://www.winzip.com/) or other programs to extract the file. Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2006/1138/ Fees: none Metadata_Reference_Information: Metadata_Date: 2006 Metadata_Review_Date: 2006 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Theodore Brandt Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Address: MS 980, Box 25046 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 303-236-1901 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998