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Page 5310, results 132726 - 132750

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Joints, fissures, and voids in rhyolite welded ash-flow tuff at Teton damsite, Idaho
Harold J. Prostka
1977, Open-File Report 77-211
Several kinds of joints, fissures, and voids are present in densely welded rhyolite ash-flow tuff at Teton damsite. Older fissures and voids probably were formed in the ash-flow sheet during secondary flowage, which probably was caused by differential compaction or settling over irregular topography. The younger, more abundant fissures are...
Ground-water hydrology of the Lower Milliken-Sarco-Tulucay Creeks area, Napa County, California
Michael J. Johnson
1977, Water-Resources Investigations Report 77-82
The Sonoma Volcanics are the principal water-bearing materials in the lower Milliken-Sarco-Tulucay Creeks area, which occupies about 15 square miles (39 square kilometers) in and east of Napa, Calif. The distribution and composition of these volcanic units are highly variable and complex. Within the Sonoma Volcanics the tuffs constitute the...
Hydrologic data for Mountain Creek, Trinity River basin, Texas, 1975
H.D. Buckner
1977, Open-File Report 77-72
Mountain Creek drains the northeast corner of Johnson County, the northwest corner of Ellis County, the southeast corner of Tarrant County, and part of the southwest corner of Dallas County, Tex. The basin is 30 miles long and averages 10 miles in width. The total drainage area at the mouth...
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...
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....