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Jennie L. Ridgley

Publications and source records attributed to Jennie L. Ridgley.

At least 19 recordsLinked to original sources
USGS2009

Preliminary vitrinite and bitumen reflectance, total organic carbon, and pyrolysis data for samples from Upper and Lower Cretaceous strata, Maverick Basin, south Texas

The Lower Cretaceous Pearsall Formation, a regionally occurring limestone and shale interval of 500-600-ft maximum thickness (Rose, 1986), is being evaluated as part of an ongoing U.S. Geological Survey (USGS) assessment of undiscovered hydrocarbon resources in onshore Lower Cretaceous strata of the northern Gulf of Mexico. The purpose of this report is to release preliminary vitrinite and bitumen reflectance, total organic carbon, and pyrolysis data for Pearsall Formation, Glen Rose Formation, Hosston Formation, Austin Group, and Eagle Ford Group samples from the Maverick Basin in south Texas in order to aid in the characterization of these strata in this area. The preliminary nature of this report and the data contained herein reflect that the assessment and characterization of these samples is a work currently in progress. Pearsall Formation subdivisions are, in ascending stratigraphic order, the Pine Island Shale, James Limestone, and Bexar Shale Members (Loucks, 2002). The Lower Cretaceous Glen Rose Formation is also part of the USGS Lower Cretaceous assessment and produces oil in the Maverick Basin (Loucks and Kerans, 2003). The Hosston Formation was assessed by the USGS for undiscovered oil and gas resources in 2006 (Dyman and Condon, 2006), but not in south Texas. The Upper Cretaceous Austin Group is being assessed as part of the USGS assessment of undiscovered hydrocarbon resources in the Upper Cretaceous strata of the northern Gulf of Mexico and, along with the Upper Cretaceous Eagle Ford Group, is considered to be an important source rock in the Smackover-Austin-Eagleford Total Petroleum System (Condon and Dyman, 2006). Both the Austin Group and the Eagle Ford Group are present in the Maverick Basin in south Texas (Rose, 1986).

Open-File Report↗
USGS1997

U.S. Geological Survey studies of water co-produced with oil and gas: Implications for future petroleum resource development

The U.S. Geological Survey is conducting research on the impacts of produced waters on petroleum resource development and the environment. Ongoing multidisciplinary investigations are focused on the 1) quantity and quality of current water production, 2) geologic and geochemical parameters that influence the viability of injection wells, and 3) processes that affect the dispersion of inorganic and organic constituents of produced water that are released into the surface and near-surface environment.

Conference Paper↗
USGS1987

Surface to subsurface cross sections showing correlation of the Dakota Sandstone, Burro Canyon (?) Formation, and upper part of the Morrison Formation in the Chama-El Vado area, Chama Basin, Rio Arriba County, New Mexico

This report shows the correlation of the Dakota Sandstone, Burro Canyon(?) Formation, and the upper part of the Morrison Formation in the Chama basin from E1 Cerro dome, just west of Chama, to El Vado Reservoir. Criteria needed to recognize these formations both at the outcrop and in the subsurface is also included.

New Mexico↗
USGS1986

Geochemical map of the Chama River Canyon Wilderness and contiguous roadless area, Rio Arriba County, New Mexico

The Chama River Canyon Wilderness, in Rio Arriba County, north-central New Mexico, covers 50,300 acres (20,364 hectares) within the Coyote and Cuba Ranger Districts of the Santa Fe National Forest and the Canjilon Ranger District of the Carson National Forest. In 1979 the U.S. Forest Service, under the Forest Service Roadless Area Review and Evaluation (RARE II) program, designated three additional areas, contiguous to the wilderness, for further planning to assess wilderness characteristics. These areas, totaling 4,800 acres (1,945 hectares), were collectively designated Roadless area 03098; they have since been dropped from consideration.

New Mexico↗
USGS1983

Isopach and structure contour maps of the Burro Canyon(?) Formation in the Mesa Golondrina and Mesa de los Viejos areas, Chama Basin, New Mexico

In the Chama Basin a wequence of conglomerate, sandstone, and red, gray-green, and pale-purple mudstone occurs stratigraphically between the Upper Jurassic Morrison Formation and Upper Cretaceous Dakota Sandstone. This stratigraphic interval has been called the Burro Canyon Formation by several workers (Craig and others, 1959; Smith and others, 1961; Saucier, 1974). Although similarities in lithology and stratigraphic position exist between this unit and the Burro Canyon Formation in Colorado, no direct correlation has been made between the two. For this reason the unit in the Chama Basin is called the Burro Canyon(?) Formation.

New Mexico↗
USGS1983

Isopach and structure contour maps of the Burro Canyon(?) Formation in the Chama-El Vado Area, Chama Basin, New Mexico

In the Chama Basin a wequence of conglomerate, sandstone, and red, gray-green, and pale-purple mudstone occurs stratigraphically between the Upper Jurassic Morrison Formation and Upper Cretaceous Dakota Sandstone. This stratigraphic interval has been called the Burro Canyon Formation by several workers (Craig and others, 1959; Smith and others, 1961; Saucier, 1974). Although similarities in lithology and stratigraphic position exist between this unit and the Burro Canyon Formation in Colorado, no direct correlation has been made between the two. For this reason the unit in the Chama Basin is called the Burro Canyon(?) Formation.

New Mexico↗
USGS1983

Mineral resource potential map of the Chama River Canyon Wilderness and contiguous roadless area, Rio Arriba County, New Mexico

The Chama River Canyon Wilderness and Roadless Area have a moderate to high potential for the presence of small deposits of copper with associated uranium and silver. These deposits, as yet undetected, would occur in the Permian Cutler Formation and in the lower part of the Triassic Chinle Formation, rock units that are, for the most part, present only in the subsurface. The presence of these deposits is inferred because such deposits occur in rocks of equivalent age in adjacent areas. Gypsum, of probable minable quality and quantity, occurs throughout the area. Oil and gas are possibly present in Pennsylvanian strata in the subsurface, although no drilling in the study area has tested this hypothesis. Other commodities, including noncopper-related uranium, kaolinite, chromium, vanadium, manganese, and bitumen, although present locally in anomalous concentrations, do not appear to constitute potential resources for these commodities.

New Mexico↗
USGS1978

Scatter diagrams and correlations of uranium in surface water versus discharge, conductivity, and pH at various locations throughout the United States

A study of the relationship of stream discharge, conductivity, and pH with uranium concentration in surface waters has been made for various locations in the United States utilizing data collected, for the most part, by the U.S. Geological Survey (USGS). The results of the study are portrayed by the scatter diagrams in this report. The diagrams display (1) the variability of uranium content in surface waters across the United States; (2) the variability of uranium concentration, discharge, conductivity, and pH in one stream over a period of time; and (3) the correlation of discharge, conductivity, or pH with uranium concentration for different parts of the country.

Open-File Report↗
USGS1978

A computer program designed to produce tables from alphanumeric data

This program is designed to produce tables from alphanumeric data. Each line of data that appears in the table is entered into a data file as a single line of data. Where necessary, a predetermined delimiter is added to break up the data into column data. The program can process the following types of data: (1) title, (2) headnote, (3) footnote, (4) two levels of column headers, (5) solid lines, (6) blank lines, (7) most types of numeric data, and (8) all types of alphanumeric data. In addition, the program can produce a series of continuation tables from large data sets. Fitting of all data to the final table format is performed by the program, although provisions have been made for user-modification of the final format. The width of the table is adjustable, but may not exceed 158 characters per line. The program is useful in that it permits alteration of original data or table format without having to physically retype all or portions of the table. The final results may be obtained quickly using interactive terminals, and execution of the program requires only minimal knowledge of computer usage. Tables produced may be of publishable quality, especially when reduced. Complete user documentation and program listing are included. NOTE: Although this program has been subjected to many tests a warranty on accuracy or proper functioning is neither implied nor expressed.

Open-File Report↗
USGS1978

Summary of the geology and resources of uranium in the San Juan Basin and adjacent region, New Mexico, Arizona, Utah, and Colorado

The San Juan Basin and adjacent region lie predominantly in the southeastern part of the uranium-rich Colorado Plateau of New Mexico, Arizona, Utah, and Colorado. Underlying the province are rocks of the Precambrian basement complex composed mainly of igneous and metamorphic rocks; a thickness of about 3,600 meters of generally horizontal Paleozoic, Mesozoic, and Cenozoic sedimentary rocks; and a variety of Upper Cretaceous and Cenozoic igneous rocks. Sedimentary rocks of the sequence are commonly eroded and well exposed near the present basin margins where Tertiary tectonic activity has uplifted, folded, and faulted the sequence into its present geologic configuration of basins, platforms, monoclines, and other related structural features. Sedimentary rocks of Jurassic age in the southern part of the San Juan Basin contain the largest uranium deposits in the United States, and offer the promise of additional uranium deposits. Elsewhere in the basin and the adjacent Colorado Plateau, reserves and resources of uranium are known primarily in Triassic, Jurassic, and Cretaceous strata. Only scattered occurrences of uranium are known in Paleozoic

Open-File Report↗