Publications
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Sedimentology of the Pennsylvanian and Permian Strathearn Formation, Northern Carlin Trend, Nevada; with a section on microfossil controls on age of the Strathearn Formation
Two framework-supported, poorly bedded conglomerate units of the middle Upper Pennsylvanian and middle Lower Permian Strathearn Formation belonging to the overlap assemblage of the Antler orogen are prominent in the northern Carlin trend. These horizons stratigraphically and temporally bracket thrust emplacement of a major allochthonous thrust plate of mainly quartzarenite of the Ordovician Vinini
Authors
Vladimir I. Berger, Donald A. Singer, Ted G. Theodore, Anita G. Harris, Calvin H. Stevens
Statistical compilation of NAPAP chemical erosion observations
In the mid 1980s, the National Acid Precipitation Assessment Program (NAPAP), in cooperation with the National Park Service (NPS) and the U.S. Geological Survey (USGS), initiated a Materials Research Program (MRP) that included a series of field and laboratory studies with the broad objective of providing scientific information on acid rain effects on calcareous building stone. Among the several e
Authors
Victor G. Mossotti, A. Raouf Eldeeb, Michael M. Reddy, Terry L. Fries, Mary Jane Coombs, Ron L. Schmiermund, Susan I. Sherwood
Digital database of mining-related features at selected historic and active phosphate mines, Bannock, Bear Lake, Bingham, and Caribou counties, Idaho
This report provides a description of data and processes used to produce a spatial database that delineates mining-related features in areas of historic and active phosphate mining in the core of the southeastern Idaho phosphate resource area. The data have varying degrees of accuracy and attribution detail. Classification of areas by type of mining-related activity at active mines is generally de
Authors
J. Douglas Causey, Phillip R. Moyle
1:100,000-scale topographic contours derived from digital elevation models, San Francisco Bay region, California: a digital database
This report presents a consistent set of 1:100,000-scale vector topographic contours for all eleven 30x60-minute quadrangles in the San Francisco Bay region for use in visualizing the topography and preparing maps of the region. The contours were prepared by contouring an areally continuous 30-m altitude grid (National Elevation Dataset, Jan., 1999), and differ from USGS hypsographic DLG's (availa
Authors
Heather M. Wright, Carl M. Wentworth
Analytical data for waters of the Harvard Open Pit, Jamestown Mine, Tuolumne County, California, March 1998-September 1999
The Jamestown mine is located in the Jamestown mining district in western Tuolumne County, California (see Fig. 1). This district is one of many located on or near the Melones fault zone, a major regional suture in the Sierra Nevada foothills. The districts along the Melones fault comprise the Mother Lode gold belt (Clark, 1970).
The Harvard pit is the largest of several open pits mined at the Ja
Authors
R. P. Ashley, K. S. Savage
The Cretaceous-Tertiary boundary interval in Badlands National Park, South Dakota
A marine K-T boundary interval has been identified throughout the Badlands National Park region of South Dakota. Data from marine sediments suggest that deposits from two asteroid impacts (one close, one far away) may be preserved in the Badlands. These impact-generated deposits may represent late Maestrichtian events or possibly the terminal K-T event. Interpretation is supported by paleontologic
Authors
Philip W. Stoffer, Paula Messina, John A. Chamberlain, Dennis O. Terry
Gravity data along LARSE (Los Angeles Regional Seismic Experiment) Line II, southern California
The U.S. Geological Survey conducted a detailed gravity study along part of the Los Angeles Regional Seismic Experiment (LARSE) transect across the San Fernando Basin and Transverse Ranges to help characterize the structure underlying this area. 249 gravity measurements were collected along the transect and to augment regional coverage near the profile. An isostatic gravity low of 50-60 mGal refle
Authors
R .J. Wooley, V. E. Langenheim
Geologic map and digital database of the Porcupine Wash 7.5 minute Quadrangle, Riverside County, southern California
This data set maps and describes the geology of the Porcupine Wash 7.5 minute quadrangle, Riverside County, southern California. The quadrangle, situated in Joshua Tree National Park in the eastern Transverse Ranges physiographic and structural province, encompasses parts of the Hexie Mountains, Cottonwood Mountains, northern Eagle Mountains, and south flank of Pinto Basin. It is underlain by a ba
Authors
Robert E. Powell
Geologic constraints on the upper limits of reserve growth
For many oil and gas fields, estimates of ultimate recovery (the sum of cumulative production plus estimated reserves) tend to increase from one year to the next, and the gain is called reserve growth. Forecasts of reserve growth by the U.S. Geological Survey rely on statistical analyses of historical records of oil and gas production and estimated reserves. The preproposal in this Open-File Repor
Authors
Richard G. Stanley
Preliminary compilation of data for selected oil test wells in Northern California
Oil test wells can provide information on the depth, age, inclination, porosity, permeability, density, faulting, folding, and organic content of geologic formations mapped at the surface, or on units not recognized in surface outcrops. Formation density, as expressed in sonic and density logs commonly obtained when wells are drilled, has become increasingly important in making a crustal-scale 3-D
Authors
Earl E. Brabb, Charles L. Powell, Thomas M. Brocher
Resources on federal lands for five coal beds in the northern and central Appalachian Basin coal regions
No abstract available.
Authors
Susan J. Tewalt
Basin-centered gas systems of the U.S.
Basin-center accumulations, a type of continuous accumulation, have spatial dimensions equal to or exceeding those of conventional oil and gas accumulations, but unlike conventional fields, cannot be represented in terms of discrete, countable units delineated by downdip hydrocarbon-water contacts. Common geologic and production characteristics of continuous accumulations include their occurrence
Authors
Marin A. Popov, Vito F. Nuccio, Thaddeus S. Dyman, Timothy A. Gognat, Ronald C. Johnson, James W. Schmoker, Michael S. Wilson, Charles E. Bartberger