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Petrography, Mineralogy, and Reservoir Characteristics of the Upper Cretaceous Mesaverde Group in the East-Central Piceance Basin, Colorado

Description: From abstract: Three closely spaced wells drilled through the Upper Cretaceous Mesaverde Group and were extensively cored and logged in order to identify the factors controlling the occurrence and distribution of gas in low-permeability rocks and to improve recovery technology.
Date: 1989
Creator: Pitman, Janet K.; Pollastro, Richard M. & Spencer, Charles Winthrop
Partner: UNT Libraries Government Documents Department

Sedimentology, Mineralogy, Palynology, and Depositional History of Some Uppermost Cretaceous and Lowermost Tertiary Rocks Along the Utah Book and Roan Cliffs East of the Green River

Description: From abstract: This report analyzes the 4-5 million years of depositional history of the Upper Cretaceous Lower Tertiary Rocks along the Green River.
Date: 1990
Creator: Franczyk, Karen J.; Nichols, Douglas J. & Pitman, Janet K.
Partner: UNT Libraries Government Documents Department

Stratigraphy of the Mississippian System, South-Central Colorado and North-Central New Mexico

Description: From abstract: In the Sawatch, Mosquito and Front Ranges of central Colorado and the Sangre de Cristo Mountains of south-central Colorado, Tournaisian beds of the Mississippian Leadville Limestone overlie rocks of Early Mississippian and Late Devonian age. In the Sangre de Cristo Mountains in north-central New Mexico, the oldest beds are the Tournaisian (zone 9) Espiritu Santo Formation. In west-central New Mexico, in the Magdalena, Lemitar, and Ladron Mountains, the Kelly Limestone of Tournaisian and Visean age rests unconformably on Proterozoic metamorphic and igneous rocks. This report examines the stratigraphy of this area.
Date: 1992
Creator: Armstrong, Augustus K.; Mamet, Bernard L. & Repetski, John E.
Partner: UNT Libraries Government Documents Department

Stratigraphy, Structure, and Paleogeography of Pennsylvanian and Permian Rocks, San Juan Basin and Adjacent Areas, Utah, Colorado, Arizona, and New Mexico

Description: From introduction: The investigation described herein is a part of the USGS Evolution of Sedimentary Basins Program. This report concerns the Pennsylvanian and Permian stratigraphic framework, structural development, and paleogeography of the San Juan Basin.
Date: 1993
Creator: Huffman, A. Curtis, Jr. & Condon, Steven M.
Partner: UNT Libraries Government Documents Department

Surface Vitrinite Reflectance Study of the Uinta and Piceance Basins and Adjacent Areas, Eastern Utah and Western Colorado: Implications for the Development of Laramide Basins and Uplifts

Description: From abstract: A study of mean random vitrinite reflectance of surface and near-surface samples was conducted in western Colorado and eastern Utah in order to better understand the subsidence and thermal histories of the Laramide-age Uinta and Piceance basins and to estimate the the thickness of overburden removed from the two basins. The history of uplift on some of the adjacent Laramide uplifts were also studied.
Date: 1993
Creator: Johnson, Ronald Carl & Nuccio, Vito F.
Partner: UNT Libraries Government Documents Department

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
Partner: UNT Libraries Government Documents Department

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.
Partner: UNT Libraries Government Documents Department

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.
Partner: UNT Libraries Government Documents Department

[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.
Partner: UNT Libraries Government Documents Department

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.
Partner: UNT Libraries Government Documents Department

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.
Partner: UNT Libraries Government Documents Department

Geology of Pre-Pennsylvanian Rocks in the Paradox Basin and Adjacent Areas, Southeastern Utah and Southwestern Colorado

Description: From abstract: This report is about the geology of pre-Pennsylvanian rocks in the Paradox basin and its adjacent areas--such as the Mississippian strata, the Upper Devonian rocks, and the Upper Cambrian--in southeastern Utah and southwestern Colorado.
Date: 1995
Creator: Condon, Steven M.
Partner: UNT Libraries Government Documents Department

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.
Partner: UNT Libraries Government Documents Department

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
Partner: UNT Libraries Government Documents Department

[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
Partner: UNT Libraries Government Documents Department

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.
Partner: UNT Libraries Government Documents Department

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.
Partner: UNT Libraries Government Documents Department

Depositional Controls on the Late Campanian Sego Sandstone and Implications for Associated Coal-Forming Environments in the Uinta and Piceance Basins

Description: From abstract: This report concerns a comparison of detailed measured sections and geophysical well-log profiles through the Sego allows subsurface identification of both depositional cycles and lateral facies changes.
Date: 1989
Creator: Franczyk, Karen J.
Partner: UNT Libraries Government Documents Department

[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.
Partner: UNT Libraries Government Documents Department

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 & Tomkin, Jessie M.
Partner: UNT Libraries Government Documents Department

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
Partner: UNT Libraries Government Documents Department