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 <covername>.rel.
Use the RELATE command with the restore argument at the arc prompt to
make the relates active. Alternatively, in ArcTools, use the Relate
environment: open dialog in the Manage - Relates flyout menu under the
ArcTools menu to make the relates active.
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 <filename> | 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