Identification_Information: Citation: Citation_Information: Originator: Mitchell W. Reynolds Originator: Theodore R. Brandt Publication_Date: 2005 Title: Geologic Map of the Canyon Ferry Dam 30' x 60' Quadrangle, West- Central Montana Edition: version 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Scientific Investigation Map Issue_Identification: Scientific Investigations Map 2860 Publication_Information: Publication_Place: Denver, Colorado, U.S.A. Publisher: United States Geological Survey Online_Linkage: http://pubs.usgs.gov/sim/2005/2860/ Description: Abstract: The geologic map of the Canyon Ferry Dam 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) at the junction of the Montana disturbed belt, the Lewis and Clark tectonic zone, the Boulder batholith and related intrusive bodies, the continental autochthon, and overprinted basin and range structures. An extensive sequence of rocks, ranging in age from Early Proterozoic through Cretaceous is strongly deformed by folding, thrust faulting, and intrusion of igneous bodies. These rocks and areas of the stable continental rocks are broken by high-angle faults of early and middle Eocene age, and overlain by Oligocene, Miocene, and Pliocene sedimentary rocks preserved in structural basins mainly of post-Middle Miocene age. Andesitic basalt flows of Oligocene age rest on high surfaces eroded across older rocks. Later erosion has dissected the entire area of the quadrangle, producing late Tertiary and Quaternary deposits of alluvium, colluvium, and local landslide deposits. Alpine glaciers in the high southern crest of the Big Belt Mountains produced glacial till and outwash deposits, and the advance of glacial lake Great Falls into the northwest corner of the map area left deposits of fine lacustrine silt and sand with minor tuff in the valley of the Missouri River. The main rivers that drain the area, the Missouri River in the western part of the quadrangle and the Smith River in the eastern part, are deeply incised by young erosion through the northern Big Belt Mountains and west end of the Little Belt Mountains, respectively. Rocks and sediments in the Canyon Ferry Dam quadrangle are assigned to 129 map units on the basis of rock or sediment type and age. Paleoproterozoic units are metamorphic crystalline rocks, including mainly granite gneiss and three other locally restricted units of metasedimentary, metavolcanic, or sodic metaintrusive origin. These rocks are part of the continental autochthon exposed in the northeast quarter of the quadrangle. A thick succession of strata of Mesoproterozoic age in six formations of the Belt Supergroup are the lowest strata of that Supergroup known in the eastern part of the Belt depositional basin. Diorite sills of Neoproterozoic age intrude rocks of the Belt Supergroup. Paleozoic rocks units are of sedimentary origin and are assigned to 29 units ranging in age from Middle Cambrian through Lower Permian. Ordovician and Silurian strata are absent. Middle Cambrian, Upper Mississippian, and most Pennsylvanian strata are predominantly of terrigenous clastic origin; Upper Cambrian, Devonian, Lower Mississippian, and lower Upper Mississippian strata are primarily marine carbonate rocks. Mesozoic rocks include 45 units of sedimentary and igneous origin. Jurassic and Lower Cretaceous strata are mainly of terrigenous clastic origin, both marine and nonmarine. Upper Cretaceous rocks of sedimentary and volcanic origin are mainly associated with three Cretaceous volcanic centers--the Elkhorn Mountains Volcanics in the southwestern corner of the quadrangle, the Two Medicine Volcanics in the northwest corner, and the distinct Adel Mountain Volcanics at the northwest central edge of the quadrangle. Twenty two units of Cretaceous igneous rocks are associated with the three volcanic sequences listed above, the Boulder Batholith in the southwest corner, and the Boulder Baldy pluton near the south-central edge of the quadrangle in the Big Belt Mountains. Tertiary rocks include igneous rocks of Eocene age, andesitic basalt of Oligocene age, and successions of Pliocene to Oligocene rocks of sedimentary, volcaniclastic, and volcanic origin preserved in fault- bounded valleys in the southwestern and eastern parts of the quadrangle. Eocene intrusive rocks form laccoliths intruded along the west-trending Tenderfoot Creek fault zone in the northeastern part of the quadrangle. Eocene dikes and sills are associated with the west-northwest-trending structural junction between the continental autochthon and the thick succession of Belt Supergroup rocks. Pliocene, Miocene, and Oligocene strata, mapped as nine units, consist generally of interbedded sand, gravel, and tuffaceous sedimentary rock and tuff. In general, Oligocene strata contain abundant tuff, local ash-flow tuff beds, vitric crystal tuff, and vitric lithic tuff interbedded with conglomerate, tuffaceous siltstone, and tuffaceous claystone. Miocene strata are mainly conglomerate, with smaller amounts of tuffaceous sediment, and Pliocene strata include conglomerate, sandstone, and siltstone, which generally contain clasts derived from local bedrock and from reworked Tertiary tuffaceous strata. Quaternary and Quaternary-Tertiary sediments, separated in 24 units, originated in four main settings. Thin accumulations of gravel, sandy silt, and sand mantle surfaces of low relief deposited across older rocks; the deposits originated as pediment gravel or windblown silt and sand along the fronts of the mountain ranges. Alluvium deposited by streams is present along most principal drainages. Glacial sediment in the quadrangle consists of till, sand and gravel of outwash origin, and lacustrine silt and very fine sand. Deposits that originated by mass wasting, including debris flow and landslide debris and colluvium, occur widely across the quadrangle on steep hillsides and slopes underlain by older units that contain mudstone and (or) volcanic tuff. Four distinct structural settings are present in the quadrangle. In the northeast quarter, Paleozoic rocks intruded by Eocene laccoliths rest unconformably on Paleoproterozoic crystalline rocks. This area constitutes the stable continental autochthon that plunges at a low angle west under structures of the Montana disturbed belt. Highly folded and thrust faulted sedimentary and volcanic rocks of Paleozoic and Mesozoic age constitute the Montana disturbed belt that occupies the northwest one-third of the quadrangle. The tight folds, broken by thrust faults and crossed locally at high angles by strike-slip faults, are detached from and override the continental autochthon along a low- angle fault, termed the Black Canyon detachment fault, which follows evaporite beds in the Upper Mississippian Kibbey Formation. Across the central and southeastern part of the quadrangle, thrust faults and high- angle reverse faults displace Mesoproterozoic rocks of the Belt Supergroup and the overlying sequence of Paleozoic rocks east and northeast, partly over the southwest edge of the disturbed belt, and partly against the southern structural boundary of the continental autochthon. The Moors Mountain thrust fault, lowest principal thrust fault in this structural area, breaks from a faulted anticline in the northwestern part of the area and increases in structural separation southeast across the quadrangle. As the separation on the Moors Mountain thrust fault increases southeast, displacement on the structurally higher Eldorado thrust fault decreases from the northwest corner of the area south-southeast into the Helena Valley fault zone. The structural boundary of the thrust-faulted Mesoproterozoic strata results from recurrent faulting between those strata and the crystalline-cored continental autochthon, as well as from late Mesozoic left-lateral faulting along the Lewis and Clark tectonic zone, which crosses the quadrangle east-southeast from the west-center edge. The southwestern margin of the quadrangle is characterized by structures related to development of the Elkhorn Mountains volcanic complex and to intrusion of the smaller Boulder batholith plutons exposed to the east in the Spokane Hills and the Big Belt Mountains. Geologic structures of Cenozoic age displace older structures. Eocene extension, marked by dacite sills and dikes, followed the older recurrent structural boundary between the continental autochthon and the eroded margin of Belt Supergroup rocks. Post-middle Miocene basin and range faulting produced the down-dropped valleys of the Smith River in the southeast, the northern extension of the Townsend Valley in the south, and the Helena Valley in the western part of the quadrangle. The faulting is interpreted as middle to late Cenozoic pull-apart of the crust resulting from right-lateral movement on the south side of the Lewis and Clark tectonic zone relative to the north side. Continued crustal movement on major faults, including the Helena Valley fault zone, the Bald Butte fault zone, the Big Belt Mountains frontal fault zone, and the Camas Creek fault, produces numerous modern earthquakes of small magnitude and rare earthquakes of intermediate magnitude. Purpose: The geologic map of the Canyon Ferry Dam quadrangle, west-central 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 map provides an interpretation of the complex geology and terrain at the junction between the Montana disturbed belt and the more stable continental crust, and defines fully for the first time the character of the southern terminus of the disturbed belt. 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: cfdgeo: polygon coverage of geologic units and faults cfdfold: line coverage of geologic fold axes, sinks in carbonate rocks, and Oligocene volcanic features cfdxs: line coverage of geologic cross-section lines geol_sfo.lin: lineset file that defines geologic line types in the geologically themed coverages wpgcmykg.shd: shadeset file that defines the cmyk values of colors assigned to polygons in the geologically themed coverages Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2005 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: none currently planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -112.0000000 East_Bounding_Coordinate: -111.0000000 North_Bounding_Coordinate: 47.00000000 South_Bounding_Coordinate: 46.50000000 Keywords: Theme: Theme_Keyword_Thesaurus: American Geological Institute Glossary of Geology Theme_Keyword: Geologic map Theme_Keyword: Adel Mountain volcanic complex Theme_Keyword: Allochthon, Montana disturbed belt Theme_Keyword: Autochthon, central Montana 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 frontal fault zone Theme_Keyword: Bilk Mountain pluton Theme_Keyword: Black Canyon decollement fault Theme_Keyword: Boulder Baldy pluton Theme_Keyword: Boulder batholith Theme_Keyword: Camas Creek fault Theme_Keyword: Cenozoic faulting Theme_Keyword: Central Montana uplift Theme_Keyword: Coal, south end of Montana disturbed belt Theme_Keyword: Cordillera fold and thrust belt Theme_Keyword: Devils Footstool laccolith Theme_Keyword: Dry Range fault zone Theme_Keyword: Earthquakes Theme_Keyword: Eldorado thrust fault Theme_Keyword: Elkhorn Mountains volcanic complex Theme_Keyword: Evaporite detachment zone Theme_Keyword: Evaporite-cored detachment folds Theme_Keyword: Glacial lake Great Falls Theme_Keyword: Helena Valley fault zone Theme_Keyword: Hogback Mountain thrust fault Theme_Keyword: Intermountain seismic belt Theme_Keyword: Laccoliths Theme_Keyword: Late Cretaceous volcanism and plutonism Theme_Keyword: Late Proterozoic tectonism Theme_Keyword: Lewis and Clark line Theme_Keyword: Lewis and Clark tectonic zone Theme_Keyword: Mesozoic unconformities Theme_Keyword: Metallic mineral occurrences, west-central Montana Theme_Keyword: Montana disturbed belt Theme_Keyword: Moors Mountain thrust fault Theme_Keyword: Pennsylvanian unconformities Theme_Keyword: Petroleum potential, south end of Montana disturbed belt Theme_Keyword: Pre-Flathead unconformity Theme_Keyword: Quaternary faulting Theme_Keyword: Recurrent faulting Theme_Keyword: Soup Creek fault Theme_Keyword: Spokane Bench fault Theme_Keyword: Spokane Hills fault zone Theme_Keyword: Tenderfoot Creek fault zone Theme_Keyword: Tertiary basins Theme_Keyword: Volcano Valley fault Theme_Keyword: Woods Mountain laccolith 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: Adel Mountains Place_Keyword: American Bar Missouri River Place_Keyword: Beartooth Mountain Big Belt Mountains Place_Keyword: Beartooth State Game Range Place_Keyword: Beaver Creek Big Belt Mountains Place_Keyword: Bilk Mountain Big Belt Mountains Place_Keyword: Big Belt Mountains Place_Keyword: Birch Creek Big Belt Mountains Place_Keyword: Boulder Baldy Big Belt Mountains Place_Keyword: Broadwater County Place_Keyword: Canyon Ferry Dam Missouri River Place_Keyword: Canyon Ferry Lake Missouri River Place_Keyword: Cascade County Place_Keyword: Confederate Gulch Big Belt Mountains Place_Keyword: Dry Range Place_Keyword: East Helena Place_Keyword: Eldorado Bar Missouri River Place_Keyword: Elkhorn Mountains Place_Keyword: Gates of the Mountains Wilderness Area Place_Keyword: Gates of the Rocky Mountains Big Belt Mountains Place_Keyword: Hauser Dam Missouri River Place_Keyword: Hauser Lake Big Belt Mountains Place_Keyword: Helena Place_Keyword: Helena National Forest Place_Keyword: Helena Valley Regulating Reservoir Place_Keyword: Hilger Valley Big Belt Mountains Place_Keyword: Hogback Mountain Big Belt Mountains Place_Keyword: Holter Lake Big Belt Mountains Place_Keyword: Jefferson County Place_Keyword: Lake Helena Place_Keyword: Lewis and Clark County Place_Keyword: Lingshire Big Belt Mountains Place_Keyword: Little Belt Mountains Place_Keyword: Meagher County Place_Keyword: Metropolitan Bar Big Belt Mountains Place_Keyword: Ming Bar Missouri River Place_Keyword: Missouri River Big Belt Mountains Place_Keyword: Newlan Creek Place_Keyword: Prickly Pear Creek Place_Keyword: Rock Creek Big Belt Mountains Place_Keyword: Sheep Creek Little Belt Mountains Place_Keyword: Smith River Place_Keyword: Smith River Valley Place_Keyword: Spokane Bar Place_Keyword: Spokane Hills Place_Keyword: Tenderfoot Creek Little Belt Mountains Place_Keyword: Trout Creek Big Belt Mountains Place_Keyword: Upper Holder Lake Missouri River Place_Keyword: White Gulch Big Belt Mountains Place_Keyword: York Big Belt Mountains Access_Constraints: None Use_Constraints: None. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. Although software enables the 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/sim/2005/2860/2860_sheet1_print.pdf Browse_Graphic_File_Description: graphic representation of map layout Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/sim/2005/2860/2860_sheet2_print.pdf Browse_Graphic_File_Description: graphic representation of map layout Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/sim/2005/2860/2860_sheet2_screen.pdf Browse_Graphic_File_Description: graphic representation of map layout Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/sim/2005/2860/2860_sheet3_print.pdf Browse_Graphic_File_Description: graphic representation of map layout Browse_Graphic_File_Type: PDF Data_Set_Credit: Hannah Moyer, Techni Graphic Systems, Inc., and Kenzie Turner, U.S. Geological Survey, assisted in the digitization of the GIS Database Native_Data_Set_Environment: Windows_XP, Intel ARC/INFO version 8.3 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 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 complete. 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 about 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: Billingsley, P.R. Originator: Locke, Augustus Title: Structure of ore deposits in the continental framework Publication_Date: 1939 Series_Information: Series_Name: American Institute of Mining and Metallurgical Engineers Issue_Identification: none Other_Citation_Details: 51 p. Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1939 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Billingsley and Locke (1939) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Birkholz, D.O. Title: Geology of the Camas Creek area, Meagher County, Montana Publication_Date: 1967 Series_Information: Series_Name: Montana College of Mineral Science and Technology Issue_Identification: unpublished M.S. thesis Other_Citation_Details: 68 p. Source_Scale_Denominator: 31680 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: Birkholz (1967) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Davis, W.E. Originator: Kinoshita, W.T. Originator: Smedes, H.W. Title: Bouguer gravity, aeromagnetic, and generalized geologic map of East Helena and Canyon Ferry quadrangles and part of the Diamond City quadrangle, Lewis and Clark, Broadwater, and Jefferson Counties, Montana Publication_Date: 1963 Series_Information: Series_Name: U.S. Geological Survey Geophysical Investigations Map Issue_Identification: GP-444 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: Davis and others (1963) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: duBray, E.A. Title: Geologic map showing distribution of Cretaceous intrusive rocks in the central Big Belt Mountains, Broadwater and Meagher Counties, Montana Publication_Date: 1995 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Field Studies Map Issue_Identification: MF-2291 Source_Scale_Denominator: 50000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: duBray (1995) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: duBray, E.A. Originator: Snee, L.W. Title: Composition, age, and petrogenesis of Late Cretaceous intrusive rocks in the central Big Belt Mountains, Broadwater and Meagher Counties, Montana Publication_Date: 2002 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 1657 Other_Citation_Details: 30 p. 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: duBray and Snee (2002) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Folk, R.L. Title: Spectral subdivision of limestone types, in Ham, W.E., ed., Classification of carbonate rocks--A symposium Publication_Date: 1962 Series_Information: Series_Name: American Association of Petroleum Geologists Memoir Issue_Identification: 1 Other_Citation_Details: p. 62-84 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1962 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Folk (1962) Source_Contribution: geologic data source 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.; Plate 1 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 Source_Information: Source_Citation: Citation_Information: Originator: Gualtieri, J.L. Title: Preliminary unedited geologic map of the Confederate Gulch area, Broadwater and Meagher Counties, Montana Publication_Date: 1975 Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 75-211 Source_Scale_Denominator: 48000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1975 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Gualtieri (1975) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Harrison, J.E. Originator: Reynolds, M.W. Title: Western U.S. continental margin: A stable platform dominated by vertical tectonics in the late Precambrian Publication_Date: 1976 Series_Information: Series_Name: Geological Society of America Abstracts with Programs Issue_Identification: v. 8, no. 6 Other_Citation_Details: p. 905 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1976 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Harrison and Reynolds (1976) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Hobbs, S.W. Originator: Griggs, A.B. Originator: Wallace, R.E. Originator: Campbell, A.B. Title: Geology of the Coeur d'Alene District, Shoshone County, Idaho Publication_Date: 1965 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 478 Other_Citation_Details: 139 p. 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: Hobbs and others (1965) 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: McCallum, M.E. Title: written communication, Geologic map of the Candle Mountain quadrangle, Montana Publication_Date: 1984 Series_Information: Series_Name: Unpublished material Issue_Identification: Unpublished material Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1984 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: McCallum (1984) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Mertie, J.B. Originator: Fischer, R.P. Originator: Hobbs, S.W. Title: Geology of the Canyon Ferry quadrangle, Montana Publication_Date: 1951 Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 972 Other_Citation_Details: 97 p.; Plate 1 Source_Scale_Denominator: 48000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1951 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Mertie and others (1951) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Pardee, J.T. Originator: Schrader, F.C. Title: Metalliferous deposits of the greater Helena mining region, Montana Publication_Date: 1933 Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 842 Other_Citation_Details: 318 p. Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1933 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Pardee and Schrader (1933) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Reynolds, M.W. Title: Geologic map of the Hogback Mountain quadrangle, Lewis and Clark County, Montana Publication_Date: 2003 Series_Information: Series_Name: U.S. Geological Survey Geologic Investigations Series Issue_Identification: I-2773 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2003 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Reynolds (2003) 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: 2003 Series_Information: Series_Name: U.S. Geological Survey Geologic Investigations Series Issue_Identification: I-2774 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2003 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Reynolds and Hays (2003) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Reynolds, M.W. Originator: U.S. Geological Survey Title: unpublished detailed geologic mapping Publication_Date: Unpublished material Series_Information: Series_Name: Unpublished material Issue_Identification: Unpublished material Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: Unknown Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Reynolds and U.S. Geological Survey (unpublished) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Reynolds, M.W. Title: Character and significance of deformation at the east end of the Lewis and Clark line, Montana Publication_Date: 1977 Series_Information: Series_Name: Geological Society of America Abstracts with Programs Issue_Identification: v. 9, no. 6 Other_Citation_Details: p. 758-759 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1977 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Reynolds (1977) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Reynolds, M.W. Title: Character and extent of basin-range faulting, western Montana and east-central Idaho, in Newman, G.W., and Goode, H.D., eds., RMAG and UGA 1979 Basin and Range Symposium Publication_Date: 1979 Series_Information: Series_Name: Rocky Mountain Association of Geologists Issue_Identification: none Other_Citation_Details: p. 185-193 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1979 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Reynolds (1979) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Reynolds, M.W. Originator: Close, T.J. Title: Gates of the Mountains Wilderness and additions, Montana, in Marsh, S.P., Kropschot, S.J., and Dickinson, R.G., eds., Wilderness Mineral Potential Publication_Date: 1984 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 1300, volume 2 Other_Citation_Details: p. 705-708 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1984 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Reynolds and Close (1984) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Reynolds, M.W. Originator: Kleinkopf, M.D. Title: The Lewis and Clark line, Montana-Idaho: A major intraplate tectonic boundary Publication_Date: 1977 Series_Information: Series_Name: Geological Society of America Abstracts with Programs Issue_Identification: v.9, no. 7 Other_Citation_Details: p. 1140-1141 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1977 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Reynolds and Kleinkopf (1977) Source_Contribution: geologic data source Source_Information: Source_Citation: Citation_Information: Originator: Robinson, G.D. Originator: McCallum, M.E. Title: Preliminary geologic map of the Beartooth Mountain quadrangle, Lewis and Clark County, Montana Publication_Date: 1991 Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 91-0113 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1991 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Robinson and McCallum (1991) 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, Lewis and Clark County, Montana 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: Schmidt, R.G. Title: U.S. Geological Survey, written communication Publication_Date: 1982 Series_Information: Series_Name: Unpublished material Issue_Identification: Unpublished material Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1982 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Schmidt (1982) 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 Other_Citation_Details: 116 p.; Plate 1 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: Tysdal, R.G. Title: Revision of Cretaceous Slim Sam Formation, Elkhorn Mountains area, Montana Publication_Date: 2000 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 1601-B Other_Citation_Details: 14 p. Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information Single_Date/Time: Calendar_Date: 2000 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Tysdal (2000) 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: 1999 Process_Step: Process_Description: The geologic database was compiled using ArcInfo. Initial digitization of map features was performed by Techni Graphic Systems, Inc. using USGS-provided 1:100,000-scale mylar compilation materials. Process_Date: 2003 Process_Step: Process_Description: Subsequent to this original compilation, we extensively edited and corrected the database by digitizing into ArcInfo from georegisterd scans compiled on mylar at 1:50,000 scale. An average RMS error of 0.003 inches or better was achieved in digitizing these features. Process_Date: 2003 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: 2004 Process_Step: Process_Description: Metadata for the Geologic map of the Canyon Ferry Dam 30' x 60' quadrangle, West-Central Montana mapping project was created by Theodore Brandt, U.S. Geological Survey. Process_Date: 2004 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: 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 Grid_Coordinate_System_Name: Universal Transverse Mercator 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. cfdgeo 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 cfdgeo.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. In the cfdgeo.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 cfdgeo.con file. Linecodes greater than 100 are used for structures that are described in the cfdgeo.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 cfdgeo.ref file. Related look-up table files are cfdgeo.con, cfdgeo.str, and cfdgeo.ref. In the cfdgeo.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 cfdgeo.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: >CFDGEO.PAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 CFDGEO# 4 5 B - > 21 CFDGEO-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 - >CFDGEO.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 CFDGEO# 4 5 B - > 29 CFDGEO-ID 4 5 B - > 33 LINECODE 3 3 I - > 36 NAME 80 80 C - > 116 SOURCE 4 4 I - > 120 SYMBOL 4 4 I - > CFDGEO.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 - >CFDGEO.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 - > CFDGEO.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 - cfdfold coverage: Contains lines of geologic fold axes ,sinks in carbonate rocks, and Oligocene volcanic features In the cfdfold.aat INFO file, the LINECODE item provides a numeric code used to identify the type of linear feature. Linecodes less than 100 are used for contacts and boundaries that are described in the cfdfold.con file. Linecodes greater than 100 are used for structures that are described in the cfdgeo.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 cfdfold.ref file. Related look-up table files are cfdfold.con, cfdfold.str, and cfdfold.ref. In the cfdfold.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 cfdfold.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. >CFDFOLD.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 CFDFOLD# 4 5 B - > 29 CFDFOLD-ID 4 5 B - > 33 LINECODE 3 3 I - > 36 NAME 80 80 C - > 116 SOURCE 4 4 I - > 120 SYMBOL 4 4 I - > >CFDFOLD.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 - > >CFDFOLD.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 - cfdxs coverage: Contains geologic cross-section lines In the cfdxs.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 cfdxs.con 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 cfdxs.ref file. Related look-up table files are cfdxs.con and cfdxs.ref. In the cfdxs.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. >CFDXS.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 CFDXS# 4 5 B - > 29 CFDXS-ID 4 5 B - > 33 LINECODE 3 3 I - > 36 NAME 80 80 C - > 116 SOURCE 4 4 I - > 120 SYMBOL 3 3 I - > >CFDXS.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 - > >CFDXS.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 - cfdpts coverage: Contains points recording site-specific observations and measurements, such as strike and dip of bedding In the cfdpts.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 cfdpts.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 CFDPTS# 4 5 B - > 21 CFDPTS-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 - > >CFDPTS.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 - cfdwell coverage: Contains points recording site-specific measurements at well locations In the cfdwell.pat INFO file, the PTTYPE item labels the points as oil and gas test holes - showing operator and hole and 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 surface 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 cfdwell.ref file. >CFDWELL.PAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 CFDWELL# 4 5 B - > 21 CFDWELL-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 - >CFDWELL.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 - cfdhlsd grid: Contains hillshade values derived from USGS National Elevation Dataset (NED) 30 meter resolution elevation data for the Canyon Ferry Dam, Montana, 1:100,000 quadrangle area. The grid's projection is the same UTM nad27 datum projection used for the geologic database coverages. The illumination angle for the hillshade's shaded relief grid was generated at an azimuth of 315 degrees and horizon angle of 45 degrees In the integer grid's cfdhlsd.vat INFO file, the VALUE item lists integer values that describe the illumination level of a cell or group of cells forming a zone. The COUNT item lists the number of cells in a zone. In the grid's cfdhlsd.sta INFO file, the MIN item contains the minimum value, the MAX item contains the maximum value, the MEAN item contains the average value, and the STDV item contains the standard deviation. >CFDHLSD.VAT > >COLUMN ITEM NAMEWIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 VALUE 4 10 B - > 5 COUNT 4 10 B - >CFDHLSD.STA > >COLUMN ITEM NAMEWIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 MIN 8 15 F 3 > 9 MAX 8 15 F 3 > 17 MEAN 8 15 F 3 > 25 STDV 8 15 F 3 >Coding of LABEL and DESC attributes in the cfdgeo coverage: >LABEL | DESC >Cf | Flathead Sandstone (Middle Cambrian) >Ch | Hasmark Formation (Upper and Middle Cambrian) >Cm | Meagher Limestone (Middle Cambrian) >Cp | Park Shale (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) >DCm | Maywood Formation (Upper and Middle Devonian) and local Upper Cambrian beds >DCu | Upper and Middle Devonian and Upper and Middle Cambrian rocks, undivided >Dj | Jefferson Formation (Upper Devonian) >Du | Upper and Middle Devonian rocks, undivided >Eobd | Biotite dacite (Eocene) >Eobhd | Biotite hornblende dacite (Eocene) >Eobhqm | Biotite hornblende quartz monzonite (Eocene) >Eobqd | Biotite quartz diorite (Eocene) >Eobqm | Biotite quartz monzonite (Eocene) >Eoql | Quartz latite (Eocene) >Eor | Rhyolite (Eocene) >Je | Ellis Group, undivided (Upper and Middle Jurassic) >KJm | Morrison Formation (Lower Cretaceous and Upper Jurassic) >KJme | Morrison Formation (Lower Cretaceous and Upper Jurassic) and Ellis Group (Upper and Middle Jurassic), undivided >Kad | Adel Mountain Volcanics, dacite (Late Cretaceous) >Kal | Adel Mountain Volcanics, latite (Late Cretaceous >Kaql | Adel Mountain Volcanics, quartz latite (Late Cretaceous) >Kau | Adel Mountain Volcanics, undivided (Upper Cretaceous) >Kb | Blackleaf Formation, undivided (Upper and Lower Cretaceous) >Kbd | Biotite diorite (Late Cretaceous) >Kbf | Blackleaf Formation, Flood Member (Lower Cretaceous) >Kbg | Biotite granite (Late Cretaceous) >Kbqm | Butte Quartz Monzonite (Late Cretaceous) >Kbt | Blackleaf Formation, Taft Hill Member (Lower Cretaceous) >Kbv | Blackleaf Formation, Vaughn Member (Upper and Lower Cretaceous) >Kc | Colorado Group, undivided (Upper and Lower Cretaceous) >Kck | Colorado Group (Upper and Lower Cretaceous) and Kootenai Formation (Lower Cretaceous), undivided >Kd | Diorite (Late Cretaceous) >Kda | Dacite (Late Cretaceous) >Ket | Eagle Sandstone and Telegraph Creek Formation, undivided (Upper Cretaceous) >Keva | Elkhorn Mountains Volcanics, ash-flow tuff member (Upper Cretaceous) >Kevl | Elkhorn Mountains Volcanics, lower member (Upper Cretaceous) >Kevm | Elkhorn Mountains Volcanics, middle member (Upper Cretaceous) >Kgd | Biotite granodiorite (Late Cretaceous) >Khd | Hornblende diorite (Late Cretaceous) >Ki | Basaltic and andesitic sills, dikes, and irregular-shaped bodies related to the Elkhorn Mountains Volcanics (Late Cretaceous) >Kk | Kootenai Formation (Lower Cretaceous) >Kla | Latite (Late Cretaceous) >Kmd | Monzodiorite (Late Cretaceous) >Kmk | Marias River Formation, Kevin Member (Upper Cretaceous) >Kml | Marias River Formation, lower part, undivided (Upper Cretaceous) >Kmo | Monzonite (Late Cretaceous) >Kmu | Marias River Formation, undivided (Upper Cretaceous) >Kog | Olivine gabbro (Late Cretaceous) >Kp | Pyroxenite (Late Cretaceous?) >Kqd | Quartz diorite (Late Cretaceous) >Kqm | Quartz monzonite (Late Cretaceous) >Kr | Rhyodacite flows or shallow intrusive bodies (Late Cretaceous) >Ks | Slim Sam Formation (Upper Cretaceous) >Kt | Trachybasalt and syenogabbro (Late Cretaceous) >Ktc | Telegraph Creek Formation (Upper Cretaceous) >Ktf | Two Medicine Formation, volcanic member (Upper Cretaceous) >Ktm | Two Medicine Formation, undivided (Upper Cretaceous) >Kvi | Intrusive igneous rocks, undivided (Late Cretaceous) >Kvt | Virgelle Sandstone and Telegraph Creek Formation, undivided (Upper Cretaceous) >MDt | Three Forks Formation (Lower Mississippian and Upper Devonian) >MIOGf | Fort Logan Formation (Miocene and Oligocene) >MIOGs | Sedimentary rocks, undivided (Miocene and Oligocene) >Mh | Heath Formation (Upper Mississippian) >Mho | Heath and Otter Formations, undivided (Upper Mississippian) >Mk | Kibbey Formation (Upper Mississippian) >Ml | Lodgepole Limestone (Lower Mississippian) >Mm | Mission Canyon Limestone (Upper and Lower Mississippian) >Mmu | Madison Group, undivided (Upper and Lower Mississippian) >Mo | Otter Formation (Upper Mississippian) >Mt | Tyler Formation, undivided (Upper Mississippian) >Mts | Tyler Formation, sandstone and conglomeratic sandstone in lower part (Upper Mississippian) >Mtu | Tyler Formation, upper part (Upper Mississippian) >OGb | Basalt (Oligocene) >OGbp | Basalt in plug or volcanic neck (Oligocene) >OGr | Rhyolite flows and shallow intrusive bodies (Oligocene) >OGs | Sedimentary rocks, undivided (Oligocene) >OGts | Tuff and tuffaceous sedimentary rocks (Oligocene) >PMab | Amsden Formation (Pennsylvanian) and Big Snowy Group (Upper Mississippian), undivided >PPpq | Phosphoria (Permian) and Quadrant (Pennsylvanian) Formations, undivided >Pa | Amsden Formation (Pennsylvanian) >Pal | Amsden Formation, limestone succession at top (Pennsylvanian) >Par | Amsden Formation, red-bed succession at base (Pennsylvanian) >PoMIs | Sedimentary rocks, undivided (Pliocene and Miocene) >Pq | Quadrant Formation (Pennsylvanian) >QTa | Older alluvium (Pleistocene or Pliocene) >QTbg | Older boulder gravel (Pleistocene or Pliocene) >QTg | Older gravel (Pleistocene and Pliocene) >QTl | Older landslide deposit (Pleistocene or Pliocene) >QTp | Older pediment gravel, undivided (Pleistocene and Pliocene) >QTp1 | Older pediment gravel, lower level overlying rocks of Miocene and Oligocene age (Pleistocene and Pliocene) >QTp2 | Older pediment gravel, upper level overlying rocks of Miocene age (Pleistocene and Pliocene) >QTt | Older terrace gravel (Pleistocene or Pliocene) >Qa | Alluvium (Holocene) >Qac | Alluvium and colluvium, undivided (Holocene) >Qbg | Boulder gravel (Holocene or Pleistocene) >Qc | Colluvium (Holocene) >Qd | Debris flow deposit (Holocene and Pleistocene) >Qdt | Dredge tailings (Holocene) >Qgl | Glacial lake Great Falls deposit (Pleistocene) >Qgo | Glacial outwash deposit (Pleistocene) >Qgt | Glacial till (Pleistocene) >Ql | Landslide deposit (Holocene and Pleistocene) >Qlb | Landslide deposit of basalt fragments (Holocene and Pleistocene) >Qoa | Old alluvium (Holocene or Pleistocene) >Qog | Old gravel (Holocene or Pleistocene) >Qp | Pediment gravel (Holocene? and Pleistocene) >Qpw | Pediment gravel with windblown silt and sand (Holocene? and Pleistocene) >Qt | Terrace gravel (Holocene and Pleistocene) >TKd | Garnet peridotite in diatreme (Tertiary or Upper Cretaceous) >Tl | Landslide deposit (Miocene or Oligocene) >Tr | Sedimentary rock rubble (Pliocene?) >Ts | Sedimentary rocks (Miocene, Oligocene, and Eocene(?)) >Tsb | Sedimentary breccia with pumice- and basalt-fragment tuff bed (Miocene or Oligocene) >Water | Open water >Xbg | Biotite gneiss (Paleoproterozoic) >Xgg | Granite gneiss (Paleoproterozoic) >Xhd | Hornblende diorite (Paleoproterozoic) >Xsy | Syenite (Paleoproterozoic) >Ye | Empire Formation (Mesoproterozoic) >Yg | Greyson Formation (Mesoproterozoic) >Ygh | Greyson Formation, lower plate of Moors Mountain thrust fault and upper plate of Hogback Mountain thrust fault (Mesoproterozoic) >Yh | Helena Formation (Mesoproterozoic) >Yn | Newland Formation (Mesoproterozoic) >Ynei | Neihart Quartzite (Mesoproterozoic) >Ys | Spokane Formation (Mesoproterozoic) >Zd | Diorite (Neoproterozoic) >Coding of LINECODE and NAME attributes in the cfdgeo coverage: >LINECODE | NAME >1 | Contact - Certain >2 | Contact - Approximately located >3 | Contact - Concealed >41 | Shoreline >44 | Collapse structure or sinkhole >81 | Map boundary >101 | Fault - Certain >102 | Fault - Approximately located >103 | Fault - Concealed >111 | Normal fault - Certain >112 | Normal fault - Approximately located >113 | Normal fault - Concealed >131 | Strike-slip fault - Certain >161 | Reverse fault - Certain >163 | Reverse fault - Concealed >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 >512 | Eocene or Late Cretaceous dike or sill >517 | Overturned thrust fault - Certain >536 | Normal fault - Inferred >537 | Fault - Inferred >551 | Fault - Located by gravity survey >556 | Low-angle fault of gravity origin - Certain >Coding of LINECODE and NAME attributes in the cfdfold coverage: >LINECODE | NAME >81 | Map boundary >401 | Anticline - Certain >402 | Anticline - Approximately located >403 | Anticline - Concealed >413 | Syncline - Certain >414 | Syncline - Approximately located >415 | 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 >512 | Oligocene basalt dike >512 | Neoproterozoic dike or sill >538 | Inverted anticline - Certain >542 | Inverted syncline - Certain >545 | Inverted syncline - Concealed >546 | Oligocene basalt plug >547 | Oligocene volcanic vent breccia >Coding of LINECODE and NAME attributes in the cfdxs coverage: >LINECODE | NAME >98 | Cross-section line 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. cfd100r.tif: A geo-registered raster file of the USGS Canyon Ferry Dam, Montana 1:100,000 scale base map. 2860p1_v1.0.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 6.0). 2860p2_v1.0.pdf: A print-optimized file for viewing and printing a graphics version of plate 2 of the map and accessory elements using Adobe Acrobat viewing software (version 6.0). 2860p3_v1.0.pdf: A print-optimized file for viewing and printing a graphics version of plate 3 of the map and accessory elements using Adobe Acrobat viewing software (version 6.0). (Adobe Acrobat 6.0 viewing software is free and can be downloaded at the following URL: http://www.adobe.com/products/acrobat/readstep2.html 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: 1-888-ASK-USGS Contact_Electronic_Mail_Address: webmaster@geology.cr.usgs.gov Resource_Description: Scientific Investigations Map 2860 Distribution_Liability: Although this digital spatial database has been subjected to rigorous review and is substantially complete, it is released on the condition that neither the USGS nor the United States Government nor any agency thereof, nor any employees thereof, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Standard_Order_Process: Non-digital_Form: Available as three printed sheets plus one pamphlet. Order from USGS at the address listed above or see http://rmmcweb.cr.usgs.gov/public/mod/order.html for more ordering information. Fees: for current charges please see http://rmmcweb.cr.usgs.gov/public/mod/order.html 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: Scientific Investigations Map 2860 Distribution_Liability: none Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE,SHP Format_Version_Number: 8.3 Format_Version_Date: 2003 File_Decompression_Technique: GZIP TAR archive, In UNIX use the command "gunzip -c | tar xvf -" 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/sim/2005/2860/ Fees: none Metadata_Reference_Information: Metadata_Date: 2005 Metadata_Review_Date: 2005 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