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Page 831, results 20751 - 20775

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The Emma Bell deposit, Siskiyou Co., California: A possible low-grade source of chromite
B. R. Lipin, Nicholas Wetzel, S. M. Heinrich
1983, Open-File Report 83-816
The Emma Bell chromite deposit in Siskiyou County, California contains over 5 million tons of dunite averaging about 4 percent Cr2O3. Chromite is not evenly disseminated throughout the dunite, however. For the most part the deposit consists of many chromite-rich bands in sharp contact with, and separated by, common dunite...
Analyses of elutriates, native water, and bottom material in selected rivers and estuaries in western Oregon and Washington
Gregory J. Fuhrer, Frank A. Rinella
1983, Open-File Report 82-922
Chemical analyses of elutriates, bottom sediment and water samples for selected metals, nutrients and organic compounds including insecticides and herbicides have been made to provide data to determine short-term water quality conditions associated with dredging operations in rivers and estuaries. Between May and December 1980 data were collected as far...
Precision gravity networks at Lassen Peak and Mount Shasta, California
Robert C. Jachens, Daniel Dzurisin, W.P. Elder, R. W. Saltus
1983, Open-File Report 83-192
Reoccupiable precision gravity networks for the purpose of monitoring volcanic activity were established in the vicinity of Lassen Peak and Mt. Shasta. Base-line measurements were made during the summer of 1981, nearly coincident in time with other base-line geodetic measurements. The gravity surveys yielded gravity values at network stations relative...
Sedimentology of the lower part of the upper Triassic Chinle Formation and its relationship to uranium deposits, White Canyon area, southeastern Utah
Russell F. Dubiel
1983, Open-File Report 83-459
Closely spaced measured stratigraphic sections of the lower part of the Late Triassic Chinle Formation in the White Canyon area of southeastern Utah depict a fluvial-deltaic-lacustrine depositional sequence that hosts uranium deposits in basal fluvial sandstones. The basal Shinarump Member consists of predominantly trough-crossbedded, coarse-grained sandstone and minor gray, carbonaceous...
Crustal structure of southwestern Saudi Arabia
M. E. Gettings, H. R. Blank, W. D. Mooney, J. H. Healy
1983, Open-File Report 83-638
The southwestern Arabian Shield is composed of uplifted Proterozoic metamorphic and plutonic rocks. The Shield is bordered on the southwest by Cenozoic sedimentary and igneous rocks of the Red Sea paar and on the east by the Arabian Platform, an area of basin sedimentation throughout Phanerozoic time. The Shield appears...
Stratigraphy, structure, and some petrographic features of Tertiary volcanic rocks at the USW G-2 drill hole, Yucca Mountain, Nye County, Nevada
Florian Maldonado, S. L. Koether
1983, Open-File Report 83-732
A continuously cored drill hole designated as USW G-2, located at Yucca Mountain in southwestern Nevada, penetrated 1830.6 m of Tertiary volcanic strata composed of abundant silicic ash-flow tuffs, minor lava and flow breccias, and subordinate volcaniclastic rocks. The volcanic strata penetrated are comprised of the following in descending order:...
Hydrology of area 38, Western Region, Interior Coal Province, Iowa and Missouri
M.G. Detroy, John Skelton
1983, Open-File Report 82-1014
A nationwide need for information characterizing hydrologic conditions in mined and potential mine areas has become paramount with the enactment of the Surface Mining Control and Reclamation Act of 1977. This report is designed to be useful to the mine owners, operators, and others by presenting information about the existing...
Hydrologic data for urban studies in the Houston, Texas, metropolitan area, 1980
Fred Liscum, J.S. Hutchison, J.P. Bruchmiller, L.S. Walther
1983, Open-File Report 83-264
Hydrologic investigations of urban watersheds in Texas were begun by the U.S. Geological Survey in 1954. Studies are now in progress in Austin, and Houston. Studies have been completed in the Dallas-Fort Worth and San Antonio areas. The U.S. Geological Survey, in cooperation with the city of Houston, began studies in...
Hydrologic data for urban studies in the Austin, Texas, metropolitan area, 1981
R.M. Slade, J.E. Veenhuis, M.E. Dorsey, Heather Gardiner, A. E. Smith
1983, Open-File Report 83-44
Hydrologic investigations of urban watersheds in Texas were begun by the U.S. Geological Survey in 1954. Studies are now in progress in Austin, and Houston. Studies have been completed in the Dallas, Fort Worth, and San Antonio areas.The Geological Survey, in cooperation with the Texas Department of Water Resources, began...
Explosion-induced stress changes estimated from vibrating-wire stressmeter measurements near the Mighty Epic event, Nevada Test Site
William L. Ellis, J.D. Kibler
1983, Open-File Report 83-642
Explosion-induced compressive stress increases near an underground nuclear explosion are believed to contribute significantly to the containment of high-pressure gases within the explosion-produced cavity. These induced compressive stresses are predicted by computer calculations, but have never been adequately confirmed by field measurements, owing primarily to the unique difficulties of obtaining...