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Page 1077, results 26901 - 26925

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A computer program for borehole compensation of dual-detector density well logs
James Henry Scott
1978, Open-File Report 78-515
The computer program described in this report was developed for applying a borehole-rugosity and mudcake compensation algorithm to dual-density logs using the following information: the water level in the drill hole, hole diameter (from a caliper log if available, or the nominal drill diameter if not), and the two gamma-ray...
Water-quality data for landfills, Hillsborough County, Florida, January 1974-October 1977
Mario Fernandez Jr., Robin R. Hallbourg
1978, Open-File Report 78-820
Periodic water-quality data were collected at four landfills in Hillsborough County from January 1974 through October 1977. Water samples were analyzed for nitrogen and phosphorous species, cations, trace metals, chloride, specific conductance, chemical oxygen demand, biological oxygen demand, and coliforms. Select ground-water samples were analyzed for herbicide and pesticide. Results...
Relationship of landslides to fractures in Potomac Group deposits, Fairfax County, Virginia
William H. Langer, Stephen F. Obermeier
1978, Open-File Report 78-779
Landsliding is a common problem in eastern Fairfax County, an area underlain by Potomac Group (Lower Cretaceous) Coastal Plain deposits of silt and clay interbedded and interfingered with sand and gravel. The slides commonly are present in clay and silt that, on the basis of laboratory tests, appear to be...
Water-quality investigation of the Tyronza River Watershed, Arkansas
T.E. Lamb
1978, Open-File Report 78-175
The results of a 1-year study of surface-water quality in the Tyronza River Watershed are presented to document conditions before implementation of Soil Conservation Service programs. The report includes a general description of the watershed's topography, geology, and aquifers, and the results of monthly measurements of discharge at five sites,...
Geology of the Arco-Big Southern Butte area, eastern Snake River Plain, and potential volcanic hazards to the radioactive waste management complex, and other waste storage and reactor facilities at the Idaho National Engineering Laboratory, Idaho
Mel A. Kuntz, John O. Kork
1978, Open-File Report 78-691
The Arco-Big Southern Butte area of the eastern Snake River Plain, Idaho, includes a volcanic rift zone and more than 70 Holocene and late Quaternary basalt volcanoes. The Arco volcanic rift zone extends southeast for 50 km from Arco to about 10 km southeast of Big Southern Butte. The rift...
Discrimination of hydrothermally altered rocks along the Battle Mountain-Eureka, Nevada, mineral belt using Landsat images
M. Dennis Krohn, Michael J. Abrams, Lawrence C. Rowan
1978, Open-File Report 78-585
Landsat Multispectral Scanner (MSS) images of the northwestern part of the Battle Mountain-Eureki, Nevada mineral belt were evaluated for distinguishing hydrothermally altered rocks associated with porphyry copper and disseminated gold deposits. Detection of altered rocks from Landsat is based on the distinctive spectral reflectance of limonite present at coatings on...
Principal facts for borehole gravity stations in stratigraphic test well ERDA No. 9, Eddy County, New Mexico
Bruce A. Kososki, Stephen L. Robbins, James W. Schmoker
1978, Open-File Report 78-696
Since 1972 the U.S. Geological Survey has been conducting a series of field evaluation studies in southeastern New Mexico for the Waste Management Division of the Department of Energy (formerly U.S. Energy Research and Development Administration). On the basis of these studies, a tentative site for a nuclear waste repository/disposal...
Hydrogeologic considerations for an interstate ground-water compact on the Madison aquifer, northern Great Plains
Leonard F. Konikow
1978, Open-File Report 78-138
The development of an interstate ground-water compact for the Madison aquifer in the Northern Great Plains may provide a framework to allocate equitably this large ground-water resource while avoiding possible future interstate legal conflicts. However, some technical problems will have to be resolved first. A compact designed to regulate or...
Evaluation of hydrogeologic aspects of proposed salinity control in Paradox Valley, Colorado
Leonard F. Konikow, M. S. Bedinger
1978, Open-File Report 78-27
The salt load in the Dolores River increases by about 200,000 tons per year where it crosses Paradox Valley, Colorado, because of the discharge of a sodium chloride brine from an underlying aquifer. A ground-water management program to nearly eliminate this major source of salt, which eventually enters the Colorado...
A magnesium correction for the Na-K-Ca chemical geothermometer
R.O. Fournier, Robert W. Potter
1978, Open-File Report 78-986
Graphs and equations have been devised to correct for the adverse effects of magnesium upon the Na-K-Ca geothermometer. Either the graphs or equations can be used to determine temperature corrections when given waters have Na-K-Ca calculated temperatures above 70? C and values of R less than 50, where R =...