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Page 5301, results 132501 - 132525

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Not all publications have extents, not all extents are completely accurate
Simulated changes in ground-water levels resulting from proposed phosphate mining, west-central Florida; preliminary results
William Edward Wilson
1977, Open-File Report 77-882
A digital model of two-dimensional ground-water flow was used to simulate projected changes in the Floridan aquifer potentiometric surface in 1985 and 2000, resulting from proposed ground-water developments by the phosphate mining industry in west-central Florida. The .model was calibrated under steady-state conditions to simulate the September 1975 potentiometric surface....
GEOTHERM user guide
James R. Swanson
1977, Open-File Report 77-504
GEOTHERM is a computerized geothermal resources file developed by the U.S. Geological Survey. The file contains data on geothermal fields, wells, and chemical analyses from the United states and international sources. The General Information Processing System (GIPSY) in the IBM 370/155 computer is used to store and retrieve data. The...
Streamflow characteristics of the Joplin area, Missouri
John Skelton
1977, Open-File Report 77-605
Low-flow and peak-flow frequency data and flow-duration-data, based on records from 21 gaging stations in the Joplin area of southwestern Missouri, are presented. Generalized equations and graphs based on gaging-station records are-shown so that estimates of frequency data and the effects of urbanization on peak flows can be made at...
Preferred stream discharges for salmon spawning and rearing in Washington
C.H. Swift
1977, Open-File Report 77-422
Stream discharges preferred by salmon for spawning were determined from relationships between discharge and spawnable area at 84 study reaches on 28 streams in Washington. Preferred discharges for spawning were found statistically equivalent for chinook, pink and chum salmon. Regression equations developed for estimating discharges preferred by these species for...
Assay for uranium and determination of disequilibrium by means of in situ high resolution gamma-ray spectrometry
Allan B. Tanner, Robert M. Moxham, F. E. Senftle
1977, Open-File Report 77-571
Two sealed sondes, using germanium gamma-ray detectors cooled by melting propane, have been field tested to depths of 79 m in water-filled boreholes at the Pawnee Uranium Mine in Bee Co., Texas. When, used as total-count devices, the sondes are comparable in logging speed and counting rate with conventional scintillation...
Preliminary report on the quality of water in abandoned zinc mines in northeastern Oklahoma and southeastern Kansas
Stephen J. Playton, Robert Ellis Davis
1977, Open-File Report 77-163
On-site measurements of pH, specific conductance, and water temperature show that water in seven mine shafts in northeastern Oklahoma and southeastern Kansas is stratified, with pH decreasing and specific conductance and water temperature increasing as sampling depth increases. Concentrations of chemical constituents in mine-shaft water, such as dissolved solids, total...
Factors controlling localization of uranium deposits in the Dakota Sandstone, Gallup and Ambrosia Lake mining districts, McKinley County, New Mexico
Charles Thomas Pierson, Morris W. Green
1977, Open-File Report 77-766
Geologic studies were made at all of the uranium mines and prospects in the Dakota Sandstone of Early(?) and Late Cretaceous age in the Gallup mining district, McKinley County, New Mexico. Dakota mines in the adjacent Ambrosia Lake mining district were visited briefly for comparative purposes. Mines in the eastern...
Reconnaissance geologic study of the Vazante zinc district, Minas Gerais, Brazil
Charles H. Thorman, Samir Nahass
1977, Open-File Report 77-630
The Vazante district, Minas Gerais, 130 km south of Paracatu, produces nearly all of Brazil's zinc metal. The district is situated on the western side of the Late Precambrian Bambul basin and along the eastern and leading edge of the north-trending Brazilian orogenic belt (ca. 600-500 m.y. old) that borders...
Chromite resources of the podiform chromite deposits and exploration for concealed chromite deposits in the Medford-Coos Bay quadrangles, southwestern Oregon
Norman J. Page, Maureen G. Johnson
1977, Open-File Report 77-656
Exploration models for podiform chromite in the Medford-Coos Bay quadrangles must consider the facts that (1) one deposit occurs for every 5 km 2 of ultramafic outcrop; similarly for a 5 km 3 volume, and (2) the average deposit has a tonnage of 206 tonnes, a volume of 8.9 m...
Appraisal of ground-water conditions in Merced, California, and vicinity
R. W. Page
1977, Open-File Report 77-454
Merced is in the northeastern part of the San Joaquin Valley, California. The fresh-ground-water basin is about 1,200 feet thick. Five aquifers are defined in the Merced area: (1) The Mehrten Formation (Miocene and Pliocene), (2) a confined aquifer , (3) an intermediate aquifer, (4) a shallow aquifer, and (5)...