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Page 4990, results 124726 - 124750

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Principal facts for gravity stations of part of the Selway-Bitterroot Wilderness, Idaho and Montana
Michael R. Brickey, Viki Bankey, M. Dean Kleinkopf
1980, Open-File Report 80-1241
During the summers of 1978 and 1979, 211 gravity stations were established in the Selway-Bitterroot Wilderness area (Fig. 1). The data were obtained as part of the U.S. Geological Survey's (USGS) program to evaluate the mineral-resource potential of wilderness areas. This gravity survey complements a gravity study of the proposed...
Exploratory trench across the Pleasant Valley Fault, Nevada
Manuel G. Bonilla, H. A. Villalobos, R. E. Wallace
1980, Open-File Report 80-1245
An exploratory trench was excavated across the 1915 trace of the Pleasant Valley fault 60 km south of Winnemucca, Nevada, to get information on the history of recent displacements on a fault that had produced a major earthquake in historic time, and on the appearance of such a fault in...
Chemical analyses of coal from the Mesa Verde Formation, Grand Mesa coal field, Delta and Mesa counties, Colorado
Ronald H. Affolter, George P. Eager, Joseph R. Hatch
1980, Open-File Report 80-980
As part of a continuing program by the U.S. Geological Survey to collect and chemically analyze representative samples of U.S. coals, 45 coal samples were collected from the Upper Cretaceous Mesaverde Formation, Grand Mesa coal field, Delta and Mesa Counties, Colorado. These samples were collected from cores (30 samples, 11...
A systematic revision of the ostracode species described by Ulrich and Bassler and by Malkin from the Chesapeake Group in Maryland and Virginia
Richard M. Forester
1980, Professional Paper 1128
Those ostracode species described by Ulrich and Bassler (1904) and Malkin (1953) from the Chesapeake Group of early Miocene to early Pleistocene age are treated systematically. Lectotypes are designated for all species which have syntypic suites and the lectotypes, holotypes, or hypotypes for all but two species are illustrated. A...
Spectrographic and chemical analyses of whole-rock and insoluble-residue samples, Rolla 1° by 2° quadrangle, Missouri: Drill hole No. 22
Elwin L. Mosier, J.G. Viets, M. S. Erickson, S.K. McDanal
1980, Open-File Report 80-701
Geochemical studies of the Rolla, Mo., 1° x 2° quadrangle were begun in 1977 as part of a joint multidisciplinary study of the quadrangle by the U.S. Geological Survey and the Division of Geology and Land Survey, Missouri Department of Natural Resources. The study is to access the mineral-resource potential...
Shorter contributions to stratigraphy and structural geology, 1979
Water Resources Division, U.S. Geological Survey
1980, Professional Paper 1126-A-J
PART A: A system of anticlines lies along the trend of the sinuous course of the Colorado River for a distance of 97 km in the central Grand Canyon. Similar anticlines occur in some perennially wet side canyons. The anticlines are most abundant and well developed along northeast-trending reaches of...
Summary of regional geology, petroleum potential, resource assessment and environmental considerations for oil and gas lease sale area #56
William P. Dillon, Kim D. Klitgord, Charles K. Paull, John A. Grow, Mahlon M. Ball, Gordon Dolton, Richard B. Powers, Abdul S. Khan, Peter Popenoe, James M. Robb
1980, Open-File Report 82-398
This report summarizes our general knowledge of the petroleum potential, as well as problems and hazards associated with development of petroleum resources in the area proposed for nominations for lease sale number 56. This area includes the U.S. eastern continental margin from the North Carolina-Virginia border south to approximately Cape...
Effects of coal mine subsidence in the Sheridan, Wyoming, area
C. Richard Dunrud, Frank W. Osterwald
1980, Professional Paper 1164
Analyses of the surface effects of past underground coal mining in the Sheridan, Wyoming, area suggest that underground mining of strippable coal deposits may damage the environment more over long periods of time than would modern surface mining, provided proper restoration procedures are followed after surface mining. Subsidence depressions and...