Identification_Information: Citation: Citation_Information: Originator: Karl S. Kellogg Originator: Ralph R. Shroba Originator: Bruce Bryant Originator: Wayne R. Premo Publication_Date: 2008 Title: Geologic map of the Denver West 30' x 60' quadrangle, north-central Colorado Edition: version 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Scientific Investigations Map Issue_Identification: SIM 3000 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/sim/2008/3000 Description: Abstract: The Denver West quadrangle extends east-west across the entire axis of the Front Range, one of numerous uplifts in the Rocky Mountain region in which Precambrian rocks are exposed. The history of the basement rocks in the Denver West quadrangle is as old as 1,790 Ma. Along the east side of the range, a sequence of sedimentary rocks as old as Pennsylvanian, but dominated by Cretaceous-age rocks, overlies these ancient basement rocks and was upturned and locally faulted during Laramide (Late Cretaceous to early Tertiary) uplift of the range. The increasingly coarser grained sediments up section in rocks of latest Cretaceous to early Tertiary age record in remarkable detail this Laramide period of mountain building. On the west side of the range, a major Laramide fault (Williams Range thrust) places Precambrian rocks over Cretaceous sedimentary rocks. The geologic history of the quadrangle, therefore, can be divided into four major periods: (1) Proterozoic history, (2) Pennsylvanian to pre-Laramide, Late Cretaceous history, (3) Late Cretaceous to early Tertiary Laramide mountain building, and (4) post-Laramide history. In particular, the Quaternary history of the Denver West quadrangle is described in detail, based largely on extensive new mapping. Purpose: Land-use planners of many kinds (including National Forest managers, developers, city and rural planners, and highway builders) need accurate geologic data with which to make informed decisions. The Denver West quadrangle is designed to meet this requirement. The map is also part of the National Geologic Database, intended as digital framework for the entire country. From a scientific standpoint, the map clarifies many structural and lithologic relationships in the complex Proterozoic basement of the Colorado Front Range and portrays structural and stratigraphic features on both the east and west side of the range. Supplemental_Information: Compilation scale: 1:100,000 DATASETS INCLUDED IN THIS GEOSPATIAL DATABASE: denverw_geo polygon: geologic unit polygons denverw_geo arc: faults, dikes, and contacts denverw_folds arc: fold axes denverw_pnt point: geologic point features - bedding and foliation Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: none planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -106.000 East_Bounding_Coordinate: -105.000 North_Bounding_Coordinate: 40.000 South_Bounding_Coordinate: 39.500 Keywords: Theme: Theme_Keyword_Thesaurus: AGI Glossary of Geology Theme_Keyword: Denver West Theme_Keyword: Front Range Theme_Keyword: Geologic map Theme_Keyword: Geologic history Theme_Keyword: Proterozoic rocks Theme_Keyword: Paleozoic rocks Theme_Keyword: Mesozoic rocks Theme_Keyword: Cenozoic rocks Theme_Keyword: Quaternary deposits Theme_Keyword: Artificial fill deposit Theme_Keyword: Piney Creek Alluvium Theme_Keyword: Broadway Alluvium Theme_Keyword: Louviers Alluvium Theme_Keyword: Slocum Alluvium Theme_Keyword: Verdos Alluvium Theme_Keyword: Rocky Flats Alluvium Theme_Keyword: Till of Pinedale age Theme_Keyword: Till of Bull Lake age Theme_Keyword: Troublesome Formation Theme_Keyword: Middle Park Formation Theme_Keyword: Windy Gap Volcanic Member Theme_Keyword: Montezuma stock Theme_Keyword: Green Mountain Conglomerate Theme_Keyword: Denver Formation Theme_Keyword: Laramie Formation Theme_Keyword: Fox Hills Formation Theme_Keyword: Pierre Shale Theme_Keyword: Hygiene Sandstone Member Theme_Keyword: Niobrara Formation Theme_Keyword: Benton Group Theme_Keyword: Dakota Group Theme_Keyword: Morrison Formation Theme_Keyword: Ralston Creek Formation Theme_Keyword: Lykins Formation Theme_Keyword: Lyons Formation Theme_Keyword: Fountain Formation Theme_Keyword: Kimberllite Theme_Keyword: Pikes Peak Granite Theme_Keyword: Silver Plume Granite Theme_Keyword: Granite of Rosalie Peak Theme_Keyword: Granodiorite of Mount Evans batholith Theme_Keyword: Boulder Creek Granodiorite Theme_Keyword: Twin Spruce Monzogranite Place: Place_Keyword_Thesaurus: U.S. Board on Geographic Names (BGN) Place_Keyword: Denver Place_Keyword: Front Range Place_Keyword: Boulder Place_Keyword: Central City Place_Keyword: Georgetown Place_Keyword: Idaho Springs Place_Keyword: Nederland Place_Keyword: Morrison Place_Keyword: Conifer Place_Keyword: Empire Place_Keyword: Clear Creek Place_Keyword: South Platte River Access_Constraints: None Use_Constraints: none - Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Karl S. Kellogg Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: Mailing and physical address Address: MS 980, Box 25046 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: (303) 236-1305 - office Contact_Facsimile_Telephone: (303) 236-0214 (fax) Contact_Electronic_Mail_Address: email: kkellogg@usgs.gov Data_Set_Credit: Thanks to James Cole and Jeremy Workman who ably reviewed the map and text. Initial digital compilation by Karl Kellogg. Paco Van Sistine and Scott Snyders edited the digital version and created a correct GIS data set. Native_Data_Set_Environment: Windows_NT, 5.1, Intel ARC/INFO version 9.1 Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/sim/2008/3000/3000_map.pdf Browse_Graphic_File_Description: Graphical representation of the map. Browse_Graphic_File_Type: PDF Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Data were entered by GIS technician and authors 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. Logical_Consistency_Report: Map elements were visually checked for overshoots, undershoots, duplicate features, polygon closure, and other errors by the author and by the GIS technician(s) that created the digital database. 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 at least two other geologists 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 the compilation scale of 1:100,000 were eliminated or generalized. All geospatial database elements are attributed. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Lines were primarily mapped from previous map publications as well as ground investigation and photo interpretation of 1:24,000-scale black and white aerial photographs. These lines were digitized from the topographic field sheets and from annotated aerial photographs. Most digitized positions on the map are estimated to have about 20 m horizontal accuracy. Additional point observations were added using positions determined by a Garmin GPSmap 60CSx GPS unit with horizontal accuracy of about 5 meters. There is no elevation data in the database Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Bookstrom, A.A. Title: The Georgetown-Silver Plume district, in Holden, G.S., ed., Geological Society of America Field Trip Guidebook 1988 Publication_Date: 1988 Series_Information: Series_Name: Colorado School of Mines Professional Contributions Issue_Identification: no. 12, p. 85-91 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1988 Source_Currentness_Reference: 1988 Source_Citation_Abbreviation: Bookstrom (1988) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Braddock, W.A. Title: Geology of the Empire quadrangle, Grand, Gilpin, and Clear Creek Counties, Colorado Publication_Date: 1969 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 616, 56 p. 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: Braddock (1969) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Braddock, W.A. Originator: Cole, J.C. Title: Geologic map of Rocky Mountain National Park and vicinity, Colorado Publication_Date: 1990 Series_Information: Series_Name: U.S. Geological Survey Map Issue_Identification: I-1973 Source_Scale_Denominator: 50000 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: Braddock and Cole (1990) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Braddock, W.A. Originator: Cole., J.C. Title: Geologic map of the Estes Park 30’ x 60’ quadrangle, Colorado Publication_Date: Unpublished material Series_Information: Series_Name: U.S. Geological Survey Scientific Investigations Map Issue_Identification: unknown Source_Scale_Denominator: 100000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Braddock and Cole. (in press) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Braddock, W.A. Originator: Peterman, Z.E. Title: The age of the Iron Dike-a distinctive Middle Proterozoic intrusion in the northern Front Range of Colorado Publication_Date: 1989 Series_Information: Series_Name: The Mountain Geologist Issue_Identification: v. 26, p. 97-99 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1989 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Braddock and Peterman (1989) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Bryant, Bruce Title: Reconnaissance geologic map of the Conifer quadrangle, Jefferson County, Colorado Publication_Date: 1974 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Field Studies Map Issue_Identification: MF-597 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1974 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Bryant (1974) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Bryant, Bruce Originator: Hedge, C.E. Title: Granite of Rosalie Peak, a phase of the 1700-million-year-old Mount Evans pluton, Front Range, Colorado Publication_Date: 1978 Series_Information: Series_Name: Journal of Research of the U.S. Geological Survey Issue_Identification: v. 9, p. 447-451 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1978 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Bryant and Hedge (1978) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Bryant, Bruce Originator: McGrew, L.W. Originator: Wobus, R.A. Title: Geologic map of the Denver 1º x 2º quadrangle, north-central Colorado Publication_Date: 1981 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Investigations Series Issue_Identification: I-1163 Source_Scale_Denominator: 250000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1981 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Bryant and others (1981) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Bryant, Bruce Originator: Miller, R.D. Originator: Scott, G.R. Title: Geologic map of the Indian Hills quadrangle, Jefferson County, Colorado Publication_Date: 1973 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-1073 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1973 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Bryant and others (1973) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Cobban, W.A. Title: Diversity and distribution of Cretaceous ammonites, western United States, in Caldwell, W.G.E., and Kauffman, E.G., eds., Evolution of the western interior basin Publication_Date: 1993 Series_Information: Series_Name: Geological Society of Canada Issue_Identification: Special Paper 39, p. 435-451 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1993 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Cobban (1993) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Crosby, E.J. Title: Landslides in the Front Range Urban Corridor, Colorado Publication_Date: 1978 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Field Studies Map Issue_Identification: MF-1042 Source_Scale_Denominator: 100000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1978 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Crosby (1978) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Drewes, Harald Title: Table Mountain shoshonite porphyry lava flows and their vents, Golden, Colorado Publication_Date: 2004 Series_Information: Series_Name: Colorado Scientific Society Newsletter Issue_Identification: (October 2004 issue), p. 2. Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2004 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Drewes (2004) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Eppinger, R.G. Originator: Theobald, P.K. Originator: Carlson, R.R. Title: Preliminary geologic map of the western and southern parts of the Byers Peak, the northwestern part of the Loveland Pass, and the eastern part of the Ute Peak 7.5-minute quadrangles, Clear Creek and Grand Counties, Colorado Publication_Date: 1984 Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 84-274 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: Eppinger and others (1984) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Gable, D.J. Title: Geologic map of the Nederland quadrangle, Boulder and Gilpin Counties, Colorado Publication_Date: 1969 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-833 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: Gable (1969) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Gable, D.J. Title: Geologic map of the Tungsten quadrangle, Boulder, Gilpin, and Jefferson Counties, Colorado Publication_Date: 1972 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-978 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1972 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Gable (1972) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Gable, D.J Title: Geologic map of the Proterozoic rocks of the central Front Range, Colorado Publication_Date: 2000 Series_Information: Series_Name: U.S. Geological Survey Geologic Investigations Series Issue_Identification: I-2605 Source_Scale_Denominator: 100000 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: Gable (2000) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Gable, D.J. Originator: Madole, R.F. Title: Geologic map of the Ward quadrangle, Boulder County, Colorado Publication_Date: 1976 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-1227 Source_Scale_Denominator: 24000 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: Gable and Madole (1976) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Graubard, C.M. Originator: Mattison, J.M. Title: Syntectonic emplacement of the ~1440 Ma Mt. Evans pluton and history of motion along the Idaho Springs-Ralston Shear Zone, central Front Range, Colorado Publication_Date: 1990 Series_Information: Series_Name: Geological Society of America Abstracts with Programs Issue_Identification: v. 22, no. 6, p. 12 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: Graubard and Mattison (1990) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Hansen, W.R. Originator: Crosby, E.J. Title: Environmental geology of the Front Range Urban Corridor and vicinity, Colorado Publication_Date: 1982 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 1230, p. 1-67 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: Hansen and Crosby (1982) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Izett, G.A. Originator: Cobban, W.A. Originator: Gill, J.R. Title: The Pierre Shale near Kremmling, Colorado and its correlation to the east and the west Publication_Date: 1971 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 684-A, p. A1-A19 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1971 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Izett and others (1971) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Kellogg, K.S. Originator: Bartos, P.J. Originator: Williams, C.L. Title: Geologic map of the Frisco quadrangle, Summit County, Colorado Publication_Date: 2002 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Field Studies Map Issue_Identification: MF-2340 Source_Scale_Denominator: 24000 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: Kellogg and others (2002) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Kellogg, K.S. Originator: Bryant, Bruce Originator: Reed, J.C. Reed, Jr. Title: The Colorado Front Range–Anatomy of a Laramide uplift, in Nelson, E.P., and Erslev, E.A., eds., Field trips in the southern Rocky Mountains, USA Publication_Date: 2004 Series_Information: Series_Name: Geological Society of America Issue_Identification: Field Guide 5, p. 89-108 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2004 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Kellogg and others (2004) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Lindvall, R.M. Title: Geologic map of the Fort Logan quadrangle, Denver, Jefferson, and Arapahoe Counties, Colorado Publication_Date: 1978 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-1427 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1978 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Lindvall (1978) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Lindvall, R.M. Title: Geologic map of the Arvada quadrangle, Adams, Denver, and Jefferson Counties, Colorado Publication_Date: 1979 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-1453 Source_Scale_Denominator: 24000 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: Lindvall (1979) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Lindvall, R.M. Title: Geologic map of the Commerce City quadrangle, Adams and Denver Counties, Colorado Publication_Date: 1980 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-1541 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1980 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Lindvall (1980) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Lovering, T.S. Title: Geology and ore deposits of the Montezuma quadrangle, Colorado Publication_Date: 1935 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 178, 119 p. Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1935 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Lovering (1935) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Machette, M.N. Title: The Quaternary geology of the Lafayette Quadrangle, Colorado Publication_Date: 1975 Series_Information: Series_Name: M.S. thesis Issue_Identification: unpublished Publication_Information: Publication_Place: Boulder, Co. Publisher: University of Colorado, Boulder 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: Machette (1975) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Machette, M.N. Title: Geologic map of the Lafayette Quadrangle, Adams, Boulder, and Jefferson Counties, Colorado Publication_Date: 1977 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-1392 Source_Scale_Denominator: 24000 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: Machette (1977) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Malde, H.E. Title: Surficial geology of the Louisville Quadrangle, Colorado Publication_Date: 1955 Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 996-E, p. 217-259 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1955 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Malde (1955) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Moore, D.W. Originator: Straub, A.W. Originator: Berry, M.E. Originator: Baker, M.L. Originator: Brandt, T.R. Title: Generalized surficial geologic map of the Denver 1° x 2° quadrangle, Colorado Publication_Date: 2001 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Field Studies Map Issue_Identification: MF-2347, version 1.0 Source_Scale_Denominator: 250000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2001 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Moore and others (2001) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Scott, G.R. Title: Subdivision of the Quaternary alluvium east of the Front Range near Denver, Colorado Publication_Date: 1960 Series_Information: Series_Name: Geological Society of America Bulletin Issue_Identification: v. 71, p. 1541-1544 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1960 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Scott (1960) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Scott, G.R. Title: Geology of the Littleton quadrangle, Jefferson, Douglas, and Arapahoe Counties, Colorado Publication_Date: 1962 Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 1121-L, p. L1-L53 Source_Scale_Denominator: 24000 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: Scott (1962) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Scott, G.R. Title: Bedrock geology of the Kassler quadrangle, Colorado Publication_Date: 1963 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 421-B, pp. 71-125 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: Scott (1963) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Scott, G.R. Title: Quaternary geology and geomorphic history of the Kassler quadrangle, Colorado Publication_Date: 1963 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 421-A, p. 1-70 Source_Scale_Denominator: 24000 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: Scott (1963) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Scott, G.R. Title: Geologic map of the Morrison quadrangle, Jefferson County, Colorado Publication_Date: 1972 Series_Information: Series_Name: U.S. Geological Survey Quadrangle Map Issue_Identification: I-790-A Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1972 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Scott (1972) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Scott, G. R. Originator: Cobban, W.A. Title: Geologic and biostratigraphic map of the Pierre Shale between Jarre Creek and Loveland, Colorado Publication_Date: 1965 Series_Information: Series_Name: U. S. Geological Survey Miscellaneous Investigations Map Issue_Identification: I-439, 4 p. Source_Scale_Denominator: 48000 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: Scott and Cobban (1965) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Sheridan, D.M. Originator: Marsh, S.P. Title: Geologic map of the Squaw Pass quadrangle, Clear Creek, Jefferson, and Gilpin Counties, Colorado Publication_Date: 1976 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-1337 Source_Scale_Denominator: 24000 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: Sheridan and Marsh (1976) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Sheridan, D.M. Originator: Maxwell. C.H. Originator: Albee, A.L. Title: Geology and uranium deposits of the Ralston Buttes district, Jefferson County, Colorado Publication_Date: 1967 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 520, 121 p. Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1967 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Sheridan and others (1967) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Sheridan, D.M. Originator: Reed, J.C., Jr. Originator: Bryant, Bruce Title: Geologic map of the Evergreen quadrangle, Jefferson County, Colorado Publication_Date: 1972 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Investigations Map Issue_Identification: I-786-A Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1972 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Sheridan and others (1972) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Shroba, R.R. Title: Geologic map and physical properties for the Englewood quadrangle, Adams, Arapahoe, and Denver Counties, Colorado Publication_Date: 1980 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-1524 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1980 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Shroba (1980) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Shroba, R.R. Title: Physical properties and performance characteristics of surficial deposits and rock units in the Greater Denver area, in Hansen, W.R., and Crosby, E.J., Environmental geology of the Front Range Urban Corridor and vicinity, Colorado Publication_Date: 1982 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 1230, p. 67-86 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: Shroba (1982) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Shroba, R.R. Originator: Carrara, P.E. Title: Surficial geologic map of the Rocky Flats Environmental Technology Site and vicinity, Jefferson and Boulder Counties, Colorado Publication_Date: 1996 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Investigations Series Map Issue_Identification: I-2526 Source_Scale_Denominator: 12000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1996 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Shroba and Carrara (1996) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Sims, P.K. Title: Geologic map of the Central City quadrangle, Colorado Publication_Date: 1964 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-267 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1964 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Sims (1964) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Sims, P.K. Title: Ore deposits of the Central City-Idaho Springs area, in Holden, G.S., ed., Geological Society of America Field Trip Guidebook 1988 Publication_Date: 1988 Series_Information: Series_Name: Colorado School of Mines Professional Contributions Issue_Identification: no. 12, p. 81-83 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1988 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Sims (1988) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Sims, P.K. Originator: Drake, A.A., Jr. Originator: Tooker, E.W. Title: Economic geology of the Central City district, Gilpin County, Colorado Publication_Date: 1963 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 359, 231 p. 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: Sims and others (1963) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Sims, P.K. Originator: Gable, D.J. Title: Petrology and structure of Precambrian rocks, Central City quadrangle, Colorado Publication_Date: 1967 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 554-E, 56 p. 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: Sims and Gable (1967) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Soule, J.M. Title: Active surficial-geologic processes and related geologic hazards in Georgetown, Clear Creek County, Colorado Publication_Date: 1999 Series_Information: Series_Name: Colorado Geological Survey Open-File Report Issue_Identification: 99-13, 6 p. Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Soule (1999) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Spencer, F.D. Title: Bedrock geology of the Louisville quadrangle, Colorado Publication_Date: 1961 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-152 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1961 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Spencer (1961) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Spurr, J.E. Originator: Garrey, G.H. Originator: Ball, S.H. Title: Economic geology of the Georgetown quadrangle, Colorado Publication_Date: 1908 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 63, 422 p. Source_Scale_Denominator: 62500 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1908 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Spurr and others (1908) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Taylor, R.B Title: Geologic map of the Bottle Pass quadrangle, Grand County, Colorado Publication_Date: 1975 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-1224 Source_Scale_Denominator: 24000 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: Taylor (1975) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Taylor, R.B. Title: Geologic map of the Black Hawk quadrangle, Gilpin, Jefferson, and Clear Creek Counties, Colorado Publication_Date: 1976 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Issue_Identification: Map 1247 Source_Scale_Denominator: 24000 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: Taylor (1976) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Theobald, P.K. Title: Preliminary geologic map of the Berthoud Pass quadrangle, Clear Creek and Grand Counties, Colorado Publication_Date: 1965 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Geologic Investigations Map Issue_Identification: I-443 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1965 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Theobald (1965) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Trimble, D.E. Originator: Machette, M.N. Title: Geologic map of the greater Denver area, Front Range urban corridor, Colorado Publication_Date: 1979 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Investigations Series Map Issue_Identification: I-856-H Source_Scale_Denominator: 100000 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: Trimble and Machette (1979) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Ulrich, G.E. Title: Petrology and structure of the Porcupine Mountain area, Summit County, Colorado Publication_Date: 1963 Series_Information: Series_Name: Ph.D. dissertation Issue_Identification: unpublished Publication_Information: Publication_Place: Boulder, Co. Publisher: University of Colorado, Boulder 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: Ulrich (1963) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Van Horn, Richard Title: Surficial and bedrock geologic map of the Golden quadrangle, Jefferson County, Colorado Publication_Date: 1972 Series_Information: Series_Name: U.S. Geological Survey Map Issue_Identification: I-761-A Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1972 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Van Horn (1972) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Van Horn, Richard Title: Geology of the Golden quadrangle, Colorado Publication_Date: 1976 Series_Information: Series_Name: U.S. Geological survey Professional Paper Issue_Identification: 872, 116 p. 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: Van Horn (1976) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Wahlstrom, E.E. Originator: Hornback, V.Q. Title: Geology of the Harold D. Roberts Tunnel, Colorado–West portal to station 468+49 Publication_Date: 1962 Series_Information: Series_Name: Geological society of America Bulletin Issue_Identification: v. 73, p. 1477-1462 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: Wahlstrom and Hornback (1962) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Wallace, S.R. Originator: MacKenzie, W.B. Originator: Blair, R.G. Originator: Muncaster, N.K. Title: Geology of the Urad and Henderson molybdenum deposits, Clear Creek County, Colorado Publication_Date: 1978 Series_Information: Series_Name: Economic Geology Issue_Identification: v. 73, no. 3, p. 325-368 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1978 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Wallace and others (1978) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Wells, J.D. Title: Geology of the Eldorado Springs quadrangle, Boulder and Jefferson Counties, Colorado Publication_Date: 1967 Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 1221-D, p. D1-D85 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1967 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Wells (1967) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Widmann, B.L. Originator: Kirkham, R.M. Originator: Beach, S.T. Title: Geologic map of the Idaho Springs quadrangle, Clear Creek County, Colorado Publication_Date: 2000 Series_Information: Series_Name: Colorado Geological Survey Open-File Report Issue_Identification: 00-2 Source_Scale_Denominator: 24000 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: Widmann and others (2000) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Widmann, B.L. Originator: Miersemann, Ulrike Title: Geologic map of the Georgetown quadrangle, Clear Creek County, Colorado Publication_Date: 2001 Series_Information: Series_Name: Colorado Geological Survey Open-File Report Issue_Identification: 01-5 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2001 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Widmann and Miersemann (2001) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Widmann, B.L. Originator: Morgan, M.L. Originator: Bartos, P.J. Originator: Shaver, K.C. Originator: Gutierrez, Francisco Originator: Lockman, Andrew Title: Geologic map of the Keystone quadrangle, Summit County, Colorado Publication_Date: 2003 Series_Information: Series_Name: Colorado Geological Survey Open-File Report Issue_Identification: 02-3 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: Widmann and others (2003) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Young, E.J. Title: Geologic map of the East Portal quadrangle, Boulder, Gilpin, and Grand Counties, Colorado Publication_Date: 1991 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Investigations Series Map Issue_Identification: I-2212 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: Young (1991) Source_Contribution: geologic features Process_Step: Process_Description: The map data were digitized in MAPublisher and ARC/INFO and polygon topology built. Process_Date: 2005 Process_Step: Process_Description: Text map unit descriptors were added to the .AAT and .PAT database files for each coverage. Process_Date: 2006 Process_Step: Process_Description: Draft check plots of the geologic map and explanation were created and submitted for peer review. Geologists reviewed the plots for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Revisions were made to the geospatial database as needed. Process_Date: 2006 Process_Step: Process_Description: First draft of metadata created by Scott Snyders using FGDCMETA.AML ver. 1.32 01/11/99 Process_Date: 2006 Process_Step: Process_Description: The database files, metadata, and check plots were edited by the USGS Central Publications Group, and revisions made to the geospatial database as needed. Process_Date: 2007 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Transverse Mercator Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -105.0 Latitude_of_Projection_Origin: 0 False_Easting: 500000.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.0001 Ordinate_Resolution: 0.0001 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: DATASETS - DENVERW_GEO, DENVERW_PNT, DENVERW_FOLDS Description of items: LABEL - Short geologic unit name DESCRIPTION - Short geologic unit explanation COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME INDEXED? 1 AREA 8 18 F 5 - 9 PERIMETER 8 18 F 5 - 17 DENVERW_GEO# 4 5 B - - 21 DENVERW_GEO-ID 4 5 B - - 25 LABEL 6 6 C - - 31 DESC 150 150 C - - LABEL DESCRIPTION Breccia zone CZk Kimberlite (Cambrian or Late Proterozoic) Jm Morrison Formation (Upper Jurassic) Jmr Morrison Formation (Upper Jurassic) and Ralston Creek Formation (Upper and Middle Jurassic), undivided Ka Arapahoe Formation (Upper Cretaceous) Kb Benton Group (Upper and Lower Cretaceous) Kd Dakota Group (Lower Cretaceous) Kf Fox Hills Sandstone (Upper Cretaceous) Kl Laramie Formation (Upper Cretaceous) Klf Laramie Formation (Upper Cretaceous) and Fox Hills Sandstone (Upper Cretaceous), undivided Kmw Windy Gap Volcanic Member (Upper Cretaceous) of the Middle Park Formation Kn Niobrara Formation (Upper Cretaceous) Kp Pierre Shale (Upper Cretaceous) Kpf Hornfels of the Pierre Shale (Upper Cretaceous) Kph Hygiene Sandstone Member of the Pierre Shale (Upper Cretaceous) NPEt Troublesome Formation (Miocene and Oligocene) Ng High-level gravel deposits (Miocene?) PEKd Denver Formation (Paleocene and Upper Cretaceous) PEKda Denver Formation (Paleocene and Upper Cretaceous) and Arapahoe Formation (Upper Cretaceous), undivided PEKdg Diorite, gabbro, and lamprophyre (Tertiary and Cretaceous?) PEKix Intrusive breccia (Eocene to Late Cretaceous?) PEKmu Upper member (Paleocene and Upper Cretaceous?) of the Middle Park Formation PEKpa Porphyries of the alkalic group (Paleocene and Late Cretaceous?) PEKpc Older felsic to intermediate porphyries of alkali-calcic group (Paleocene to Late Cretaceous?) Pebi Potassic basalt (shoshonite) intrusive of Ralston Buttes (Paleocene) Pedb Potassic basalt (shoshonite) lava flows (Paleocene) of the Denver Formation Peg Green Mountain Conglomerate (Paleocene) Pema Aplite of Montezuma stock and vicinity (Eocene) Pemm Monzogranite porphyry of Montezuma stock and vicinity (Eocene) Pepc Younger felsic to intermediate porphyries of alkali-calcic group (Eocene) Perp Rhyolite porphyry (Oligocene and Eocene) Pet Rhyolite tuff (Oligocene) PPf Fountain Formation (Lower Permian and Pennsylvanian) Pl Lyons Sandstone (Lower Permian) Qndi Diamicton (middle? Pleistocene to Pliocene?) QNdr Debris-flow deposits and Rocky Flats Alluvium, undivided (early Pleistocene and late Pliocene?) QNpr Pre-Rocky Flats alluvium or debris-flow deposits (early Pleistocene or late Pliocene) QNr Rocky Flats Alluvium (early Pleistocene and late Pliocene?) Qa Post-Piney Creek alluvium and Piney Creek Alluvium, undivided (Holocene) Qac Alluvium and colluvium, undivided (Holocene to middle? Pleistocene) Qb Broadway Alluvium (late Pleistocene) Qc Colluvium (Holocene to middle? Pleistocene) Qdf Debris-flow deposits (Holocene to middle? Pleistocene) Qds Debris-flow deposits and Slocum Alluvium, undivided (middle Pleistocene) Qdv Debris-flow deposits and Verdos Alluvium, undivided (middle Pleistocene) Qes Eolian sand (Holocene and late Pleistocene) Qf Fan deposits (Holocene and late Pleistocene) Qg1 Young stream-terrace alluvium (late Pleistocene) Qg2 Intermediate stream-terrace alluvium (late and middle Pleistocene) Qg3 Old stream-terrace alluvium (middle and early? Pleistocene) Qg4 Oldest stream-terrace alluvium (middle or early Pleistocene) Qlo Loess (late and middle? Pleistocene) Qls Landslide deposits (Holocene to middle? Pleistocene) Qlv Louviers Alluvium (late and middle Pleistocene) Qmg Mass-movement and glacial deposits, undivided (Holocene and latest Pleistocene) Qp1 Lower pediment deposits (late Pleistocene) Qp2 Higher pediment deposits (late and middle Pleistocene) Qrg Rock-glacier deposits (Holocene and latest Pleistocene) Qs Slocum Alluvium (middle Pleistocene) Qt Talus deposits (Holocene to middle? Pleistocene) Qtb Till of Bull Lake age (late and middle Pleistocene) Qti Till of Pinedale age and till of Bull Lake age, undivided (late and middle Pleistocene) Qtp Till of Pinedale age (late Pleistocene) Qv Verdos Alluvium (middle Pleistocene) Qva Valley-floor alluvium (Holocene and late Pleistocene) TRPl Lykins Formation (Triassic? and Permian) Xaq Amphibolite and quartzite (Early Proterozoic) Xb Biotite gneiss (Early Proterozoic) Xbc Cordierite-biotite gneiss (Early Proterozoic) Xbg Biotite gneiss and schist with garnet (Early Proterozoic) Xbhc Biotite gneiss, hornblende gneiss, and calc-silicate gneiss (Early Proterozoic) Xbp Porphyroblastic quartz-biotite-muscovite schist of White Ranch (Early Proterozoic) Xc Calc-silicate gneiss (Early Proterozoic) Xf Quartz-feldspar gneiss (Early Proterozoic) Xfh Quartz-feldspar gneiss and hornblende gneiss (Early Proterozoic) Xgb Gabbro (Early Proterozoic) Xgc Mixed calc-silicate and biotite gneiss (Early Proterozoic) XgdB Boulder Creek Granodiorite (Early Proterozoic) Xgg Granitic gneiss (Early Proterozoic) Xgh Mafic granodiorite, quartz diorite, hornblende diorite, and hornblendite (Early Proterozoic) Xgr Monzogranite of Elephant Butte (Early Proterozoic) Xh Hornblende-plagioclase gneiss and amphibolite (Early Proterozoic) Xhc Hornblende gneiss and calc-silicate gneiss (Early Proterozoic) Xhq Amphibolite, marble, and quartzite (Early Proterozoic) Xlg Mixed layered gneiss (Early Proterozoic) Xq Quartzite (Early Proterozoic?) Xqs Muscovite-quartz schist (Early Proterozoic?) Xsr Rutile-sillimanite-quartz gneiss (Early Proterozoic) Yxcr Cataclastically and ductilely sheared rocks of the Idaho Springs- Ralston shear zone (Middle and Early Proterozoic) YxgT Twin Spruce Monzogranite (Middle? and Early Proterozoic) Yxgd Granodiorite and monzogranite of unknown age (Middle or Early Proterozoic) Yxp Pegmatite and aplite (Middle and Early Proterozoic) Yd Younger diorite and hornblendite (Middle Proterozoic?) Yg Peraluminous monzogranite (Middle Proterozoic) YgP Pikes Peak Granite (Middle Proterozoic) YgPp Fine-grained porphyritic phase of the Pikes Peak Granite (Middle Proterozoic) YgR Granite of Rosalie Peak (Middle Proterozoic) YgSP Silver Plume Granite (Middle Proterozoic) Ygb Younger gabbro (Middle Proterozoic) Ygd Granodiorite and monzogranite (Middle Proterozoic) YgdM Granodiorite of Mount Evans batholith (Middle Proterozoic) Af Artificial fill deposits (latest Holocene) W water body Desription of items: DESCRIPTION - Short explanation of feature using digital cartographic standard COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME INDEXED? 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 DENVERW_GEO# 4 5 B - - 29 DENVERW_GEO-ID 4 5 B - - 33 DESCRIPTION 100 100 C - - DESCRIPTION Border Contact--Certain Contact--Concealed Fault, type unspecified--Certain Fault, type unspecified--Concealed PEKdg dike--Diorite, gabbro, and lamprophyre (Tertiary and Cretaceous?) PEKi dike--Intrusive rock, undifferentiated (Oligocene to Late Cretaceous) PEKpa dike--Porphyries of the alkalic group (Paleocene and Late Cretaceous?) PEKpc dike--Older felsic to intermediate porphyries of alkali-calcic group (Paleocene to Late Cretaceous?) PEdb--Potassic basalt (shoshonite) lava flows (Paleocene) of the Denver Formation PEpc dike--Younger felsic to intermediate porphyries of alkali-calcic group (Eocene) PErp dike--Rhyolite porphyry (Oligocene and Eocene) Shoreline Thrust or reverse fault--Certain Thrust or reverse fault--Concealed Xsr dike--Rutile-sillimanite-quartz gneiss (early Proterozoic) Ygi dike--Gabbro dike ("Iron dike") (Middle Proterozoic) Ypd dike--Pyroxene diorite (Middle? Proterozoic) : DESCRIPTION - Short explanation of feature using digital cartographic standard COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME INDEXED? 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 DENVERW_FOLDS# 4 5 B - - 29 DENVERW_FOLDS-ID 4 5 B - - 33 DESCRIPTION 100 100 C - - DESCRIPTION Anticline in Phanerozoic rocks-certain Anticline in Proterozoic rocks-certain Anticline in Proterozoic rocks-concealed Overturned anticline in Phanerozoic rocks-certain Overturned anticline in Proterozoic rocks-certain Overturned syncline in Phanerozoic rocks-certain Overturned syncline in Proterozoic rocks-certain Syncline in Phanerozoic rocks-certain Syncline in Phanerozoic rocks-concealed Syncline in Proterozoic rocks-certain Syncline in Proterozoic rocks-concealed Description of items: AZIMUTH - Compass direction of fault plane trend, in degrees (0 - 359) DIP - Angle of fault plane inclination, in degrees from horizontal (0 – 90) DESCRIPTION - Short explanation of feature using digital cartographic standard COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME INDEXED? 1 AREA 8 18 F 5 - 9 PERIMETER 8 18 F 5 - 17 DENVERW_PNT# 4 5 B - - 21 DENVERW_PNT-ID 4 5 B - - 25 AZIMUTH 2 5 B - - 27 DIP 2 5 B - - 29 DESCRIPTION 100 100 C - - DESCRIPTION inclined foliation - showing strike and dip inclined bedding - showing strike and dip overturned bedding - showing strike and dip vertical bedding - showing strike vertical or near-vertical foliation - showing strike Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Enterprise Publishing Network Address: U.S. Geological Survey Address: MS 902, Box 25046 DFC City: Denver State_or_Province: CO Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: 303-236-5486 Resource_Description: U.S. Geological Survey Scientific Investigations Map 3000 Distribution_Liability: This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages reslting from its authorized or unauthorized use. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE, SHP Format_Version_Number: 8.1 File_Decompression_Technique: GZIP compressed TAR file (Unix), ZIP archive (Windows) Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/sim/2008/3000 Fees: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: USGS Information Services City: Denver State_or_Province: CO Postal_Code: 80225 Country: United States Contact_Voice_Telephone: 1-888-ASK-USGS Resource_Description: U.S. Geological Survey Scientific Investigations Map 3000 Distribution_Liability: none Standard_Order_Process: Non-digital_Form: Available as one printed sheet 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 Metadata_Reference_Information: Metadata_Date: 2008 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Scott R. Snyders Contact_Position: Physical Science Technician Contact_Address: Address_Type: mailing and physical address Address: Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-7648 Contact_Electronic_Mail_Address: ssnyders@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata ("CSDGM version 2") Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none Metadata_Use_Constraints: none