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Page 5391, results 134751 - 134775

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Progress report on geology of the Edwards aquifer, San Antonio area, Texas, and preliminary interpretation of borehole geophysical and laboratory data on carbonate rocks
Robert W. Maclay, Ted A. Small
1976, Open-File Report 76-627
This report describes the geology and porosity of the rocks of the Edwards aquifer, with particular attention to the eastern half of the San Antonio area. The data were obtained from geologic and geophysical studies of nine cored test holes, from laboratory analyses of samples of the aquifer materials, and...
Geology and ore deposits of the Mahd Adh Dhahab District, Kingdom of Saudi Arabia
Robert W. Luce, Abdulaziz Bagdady, Ralph Jackson Roberts
1976, Open-File Report 76-865
Mahd adh Dhahab is the principal gold-silver mine in Saudi Arabia; it was productive during three principal periods, two during ancient times (about 950 B.C. and 750-1258 A.D.) and one in modern times (1939-54). The early production is not known, but the recorded production in 1939-54 is 765,768 fine ounces...
Chemical composition data and calculated aquifer temperature for selected wells and springs of Honey Lake Valley, California
Robert H. Mariner, T. S. Presser, William C. Evans
1976, Open-File Report 76-783
Major element, minor element, and gas composition data are tabulated for 15 springs and wells in Honey Lake Valley, California. Wendel and Amedee hot springs issue Na-S04-C1 waters at boiling or near boiling temperatures; the remaining springs and wells issue Na-HC03 waters at temperatures ranging from 14 to 33 deg...
Analyses of water, core material, and elutriate samples collected near New Orleans, Louisiana (Lake Pontchartrain, Louisiana, and vicinity hurricane protection project)
Harold L. Leone
1976, Open-File Report 76-758
When a hurricane approaches the New Orleans, Louisiana area, the accompanying tides and heavy rainfall increase the level of water in Lake Borgne, Mississippi Sound, and Lake Pontchartrain and pose a major threat of water damage to the populated areas. During Hurricane Betsy (1965), for example, the level of Lake...
Distribution and trend of nitrate, chloride, and total solids in water in the Magothy aquifer in southeast Nassau County, New York, from the 1950's through 1973
Henry F. Ku, Dennis J. Sulam
1976, Water-Resources Investigations Report 76-44
Concentrations of nitrate, chloride, and total solids in water in the Magothy aquifer, southeast Nassau County, N.Y., show a steadily increasing trend from the early 1950 's through 1973. Vertical distribution of nitrate, chloride, and total-solids concentrations as shown in cross sections of the study area indicate downward movement of...
Sediment discharge in the Upper Arroyo Grande and Santa Rita Creek basins, San Luis Obispo County, California
J. M. Knott
1976, Water-Resources Investigations Report 76-64
Sediment data collected in the upper Arroyo Grande and Santa Rita Creek basins, San Luis Obispo County, California, during the 1968-73 water years were analyzed to determine total sediment discharge at four stations in the basins. Water discharge and total sediment discharge at these stations, representative of the 1943-72 period,...
Evaluation of the Umm Al Khabath copper prospect, Jabal Ibrahim quadrangle, sheet 20/41C, Kingdom of Saudi Arabia
Ronald G. Worl, Vincent J. Flanigan, Habib M. Merghelani
1976, Open-File Report 78-521
The Umm Al Khabath copper prospect (lat 20°10'N.; long 41°23'E.) was tested by 815 m of diamond drilling in three holes. Meager metallization of copper, zinc, gold, and silver is related to a distinct phase of quartz-pyrite veinlet stockworks and associated silicification, sericitization, and pyritization. Alteration and metallization are within...
Evaluation of hydrologic properties of the Long Island ground-water reservoir using cross-sectional electric-analog models
O.L. Franke, R.T. Getzen
1976, Open-File Report 75-679
Variables necessary for constructing a quantitative model to predict the response of ground-water reservoirs to hydrologic stresses are in four classes: (a) external and internal geometry of the reservoir, (b) nature of the reservoir boundaries, (c) areal distribution of horizontal and vertical hydraulic conductivities, and (d) areal distribution of storage...
Summary appraisals of the nation's ground-water resources – Arkansas-White-Red region
M. S. Bedinger, R. T. Sniegocki
1976, Professional Paper 813-H
The Arkansas-White-Red Region, an area of265,000 square miles (6.86x1011 square metres), is characterized by diversity in geography, climate, and geology and, in turn, by diversity in water resources and water problems. The western semiarid part of the region is water deficient, that is, potential evapotranspiration exceeds precipitation. The eastern, humid part...
Sediment discharge from highway cut-slopes in the Lake Tahoe Basin, California, 1972-74
Carl G. Kroll
1976, Water-Resources Investigations Report 76-19
Streamflow and fluvial-sediment discharge data were collected at selected streams and highway gutters in the Lake Tahoe basin to determine the extent of erosion from highway cuts and to attempt to evaluate the effects of various land-treatment practices to reduce erosion.Estimate of long-term annual total-sediment discharge from six streams into...