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Carbon Dioxide in Mississippian Rocks of the Paradox Basin and Adjacent Areas, Colorado, Utah, New Mexico, and Arizona

Description: From abstract: This report is about six gas samples that were obtained from the Mississippian Leadville Limestone in the McElmo field, Colorado, and the Lisbon field, Utah. These samples were recorded to contain a high reading of carbon dioxide and the report investigates these results.
Date: 1995
Creator: Cappa, James A. & Rice, Dudley D.

Complete Bouguer and Isostatic Residual Gravity Maps of the Anadarko Basin, Wichita Mountains, and Surrounding Areas, Oklahoma, Kansas, Texas, and Colorado

Description: From abstract: This report contains the complete Bouger and isostatic residual gravity maps of the Anadarko basin, Wichita Mountains, and surrounding areas on parts of Oklahoma, Kansas, Texas and Colorado that were compiled using gravity data from 11,023 stations.
Date: 1992
Creator: Robbins, Stephen L. & Keller, G. Randy, Jr.

Criteria for Outlining Areas Favorable for Uranium Deposits in Parts of Colorado and Utah

Description: Abstract: Most of the uranium deposits in the Uravan and Gateway mining districts are in the persistent upper sandstone stratum of the Salt Wash member of the Morrison formation. Areas in which this stratum is predominantly lenticular have been differentiated from areas in which the stratum is predominantly nonlenticular. The most favorable ground for uranium deposits is in areas of lenticular sandstone where the stratum is underlain by continuous altered greenish-gray mudstone. Ore is localized in scour-and-fill sandstone beds within favorable areas of lenticular sandstone. Regional control of the movement of ore-bearing solutions in the principal ore-bearing sandstone zone is indicated by belts of discontinuously altered mudstone transitional in a northerly and southerly direction from an area of unaltered mudstone to areas of continuously altered mudstone ; and an area of unaltered mudstone in which no ore deposits are found and an increase in size, number, and grade of ore deposits from areas of discontinuously altered to continuously altered mudstone. Discrete regional patterns of ore deposits and altered mudstone are associated with Tertiary structures; where these structures and favorable host rocks occur in juxtaposition, regional controls appear to have localized ore deposits.
Date: 1955
Creator: McKay, E. J.

[Evolution of Sedimentary Basins--Paradox Basin: Chapters C and D]

Description: From abstract: The report for document C is about the tectonic trends of the northern part of the Paradox Basin of southeastern Utah and southwestern Colorado, as derived from Landsat multispectral scanner imaging and geophysical and geologic mapping. The report for document D is about an uncontrolled X-band airborn radar-image mosaic that was compiled for the western three-fifths of the Moab 1° x 2° quadrangle of southeastern Utah and southwestern Colorado.
Date: 1994
Creator: Friedman, Jules D.; Case, James E.; Simpson, Shirley L. & Heller, Joan S.

[Evolution of Sedimentary Basins--San Juan Basin: Chapters J and K]

Description: From introduction to each respective report: Report J summarizes the results of several studies concerning the stratigraphy and sedimentology of uppermost Jurassic to lowermost Upper Cretaceous rocks in the San Juan basin and adjacent areas. Report K describes using X-ray diffraction techniques to determine the occurrence and distribution of clay minerals in the upper part of the Brushy Basin Member and in the Burro Canyon Formation in the Four Corners area.
Date: 1992
Creator: Aubrey, William M. & Skipp, Gary

[Evolution of Sedimentary Basins--Uinta and Piceance Basins: Chapters H and I]

Description: From abstract: Analysis of vitrinite reflectance profiles and surfaces of equal vitrinite reflectance in the southeastern part of the Piceance basin, northwestern Colorado, indicates that burial histories for the Divide Creek anticline and the Grand Hogback are different from those for adjacent synclines. These two positive structures probably reached their present-day thermal maturity before late Eocene folding and before the end of the Laramide orogeny. In contrast, adjacent synclines did not reach their present-day thermal maturity until the end of the Laramide orogeny, or possibly later.
Date: 1989
Creator: Nuccio, Vito F.; Johnson, Ronald Carl & Johnson, Samuel Y.

Facies Analysis, Genetic Sequences, and Paleogeography of the Lower Part of the Minturn Formation (Middle Pennsylvanian), Southeastern Eagle Basin, Colorado

Description: From abstract: Siliciclastic and minor carbonate rocks of the lower part of the Middle Pennsylvanian Minturn Formation of north-central Colorado were deposited in alluvial-fan, braidplain, Gilbert-delta, shoreline, and paralic, and offshore-marine environments. These strata can be divided into twelve genetic sequences that are generally bounded by transgressive surfaces of erosion or paralic flooding surfaces, and are characterized by thin and thick transgressive units. This report examines the paleogeography of this area.
Date: 1992
Creator: Karachewski, John A.

The Frontier Formation and Associated Rocks of Northeastern Utah and Northwestern Colorado

Description: From abstract: The Frontier Formation of the Mancos Group in northeastern Utah and northwesternmost Colorado (proposed new rank designations; formerly known as the Frontier Sandstone Member of the Mancos Shale) consists of several facies of marine and nonmarine rocks of Late Cretaceous (Turonian) age that grade eastward into totally marine rocks in easternmost Utah and northwestern Colorado.
Date: 1990
Creator: Molenaar, C. M. & Wilson, B. W.

General and Engineering Geology of the Wray Area, Colorado and Nebraska

Description: From abstract: Most of the formations in the Wray area are fair foundation materials, although good construction materials are scarce. The gravel of the Grand Island formation and the gravels in the Ogallala formation contain large quantities of clay, silt, sand, and calcium carbonate, and have very few pebbles larger than one-half inch in diameter.
Date: 1953
Creator: Hill, Dorothy Rachel & Tompkin, Jessie M.

Geologic History and Hydrocarbon Potential of Late Cretaceous-Age, Low-Permeability Reservoirs, Piceance Basin, Western Colorado

Description: From abstract: The Piceance basin of western Colorado contains large reserves of natural gas in low-permeability reservoirs of the Late Cretaceous-age Mesaverde Formation or Mesaverde Group. The gas accumulation can be divided into three general zones: a zone of surface-water invasion that extends inward a few miles from present outcrops, a gas-and-waterbearing zone that extends 10-20 miles inward from the water-bearing zone, and a central, predominantly gasbearing zone.
Date: 1989
Creator: Johnson, Ronald Carl

Geology and Coal Resources of the Meeker Quadrangle, Moffat and Rio Blanco Counties, Colorado

Description: From introduction: The investigations on which the greater part of this report is based were carried on by E. T. Hancock, the senior author, during the summer of 1911. They were undertaken by the United States Geological Survey under a comprehensive plan for collecting information about the undeveloped fuel resources of the Western States, both as a step toward the conservation of the coal resources of the United States and as a means of supplying the demand for information concerning the many valuable coal fields of the Western States.
Date: 1930
Creator: Hancock, E. T. & Eby, J. Brian

Geology of the Pennsylvanian and Permian Cutler Group and Permian Kaibab Limestone in the Paradox Basin, Southeastern Utah and Southwestern Colorado

Description: From abstract: This report talks about the geology of the Pennsylvanian and Permian Cutler Group that consists of the lower Cutler beds, Cedar Mesa Sandstone, Organ Rock Formation, White Rim Sandstone, and De Chelly Sandstone. The report also talks about the Permian Kaibab Limestone in the Paradox Basin that overlays the Cutler.
Date: 1997
Creator: Condon, Steven M.

Middle Cretaceous Stratigraphy on the South and East Sides of the Uinta Basin, Northeastern Utah and Northwestern Colorado

Description: From abstract: Middle Cretaceous rocks (Aptian to Coniacian) on the south side of the Uinta Basin include the nonmarine Cedar Mountain Formation and Dakota Sandstone and the lower part of the overlying marine Mancos Shale. This report examines the rocks contained within this area of the basin.
Date: 1991
Creator: Molenaar, C. M. & Cobban, William Aubrey

Mineral Resources of the Bull Gulch Wilderness Study Area, Eagle County, Colorado

Description: From summary: The USGS (U.S. Geological Survey) and the USBM (U.S. Bureau of Mines) studied 10,414 acres of the Bull Gulch (CO-070-430) Wilderness Study Area in Eagle County, Colorado. The area has identified, minable sand and gravel deposits; there are no other identified resources. It has moderate mineral resource potential for gypsum and anhydrite, and low potential for all metals, including uranium, coal, oil and gas, and geothermal resources.
Date: 1986
Creator: Soulliere, Sandra J.; Arnold, Mark A.; Hassemer, Jerry R.; Martin, Ronny A.; Kluender, Steven E. & Zelten, Jeanne E.

Mineral Resources of the Willow Creek and Skull Creek Wilderness Study Areas, Moffat County, Colorado

Description: Abstract: The Willow Creek Wilderness Study Area (CO-010-002) and the Skull Creek Wilderness Study Area (C-010-003), which contain 13,368 acres and 13,739 acres, respectively, are in northwest Colorado near the Utah border. There are no identified resources in either of the study areas. The study areas have low resource potential for undiscovered uranium, vanadium, copper, and all other metals; oil and gas; and coal.
Date: 1990
Creator: Van Loenen, Richard E.; Folger, Helen W. & Kulik, Dolores M.

Nickel Deposit Near Gold Hill, Boulder County, Colorado

Description: From Introduction: "Scattered throughout the Colorado Front Range, there are many small copper deposits, believed to be of pre-Cambrian age. The have been widely prospected but have produced little or no ore. In one of these, the Copper King mine, near Gold Hill, Colo., nickel was discovered in 1930, and development in the following years has exposed some 25,000 tons of ore containing from 2 to 3 percent of nickel. No other nickel deposit is known in the Front Range, but a somewhat similar deposit has been opened in Gem mine, near Canon City and about 120 miles south of Gold Hill."
Date: 1942
Creator: Goddard, Edwin N. & Lovering, T. S.