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Page 5890, results 147226 - 147250

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The Triassic Chitistone Limestone, Wrangell Mountains, Alaska: stressing detailed descriptions of sabkha facies and other rocks in lower parts of the Chitistone and their relations to Kennecott-type copper deposits
Augustus K. Armstrong, E. M. MacKevett
1977, Open-File Report 77-217
Recent investigations show that sabkha deposits were important in the genesis of Kennecott-type copper ore. Massive chalcocite-rich lodes at Kennecott and nearby deposits formed in the lower 110 meters of the Upper Triassic Chitistone Limestone. The Chitistone and superimposed Upper Triassic and Jurassic sedimentary rocks formed in a marine basin...
Mineral resources of the Sheep Mountain Wilderness study area and the Cucamonga Wilderness and additions, Los Angeles and San Bernardino counties, California
James G. Evans, Leroy Pankraatz, James Ridenour, Steven W. Schmauch, Nicholas T. Zilka
1977, Open-File Report 77-251
A mineral survey of the Sheep Mountain Wilderness study area and Cucamonga Wilderness area and additions by the U.S. Geological Survey and Bureau of Mines in 1975 covered about 66,500 acres (26,500 ha) of the San Bernardino and Angeles National Forests in southern California. The two study areas are separated...
Potentiometric surface of the Floridan aquifer in the Suwannee River Water Management District, north Florida, May 1976
D.W. Fisk, J.C. Rosenau
1977, Water-Resources Investigations Report 77-1
A map showing the potentiometric surface of the Floridan aquifer was prepared for that area north and west of Gainesville to near Tallahassee, Florida. Contoured at 10-foot (3.048-meter) intervals and at a scale of 1:500,000, the map illustrates the altitude to which water would rise in tightly cased wells that...
Estimated use of water in the United States in 1975
Charles Richard Murray, E. Bodette Reeves
1977, Circular 765
Estimates of water use in the United States in 1975 indicate that an average of about 420 bgd (billion gallons per day) about 1,900 gallons per capita per day was withdrawn for the four principal off-channel uses which are (1) publicsupply (for domestic, commercial, and industrial uses), (2) rural (domestic...
Preliminary analysis of lineaments and engineering properties of bedrock, Penobscot Bay area, Maine
Fitzhugh T. Lee, Dennis W. O’Leary, Sharon F. Diehl
1977, Open-File Report 77-886
A remote sensing study of coastal and near coastal Maine was undertaken to identify bedrock features of possible importance to construction. Major lineaments were identified that separate the region into four distinct terrains. Within each terrain, smaller lineaments and other physiographic features show distinctive and consistent patterns, reflecting similarities in...
The United States Geological Survey in Alaska: Organization and status of programs in 1977
Kathleen M. Blean, editor(s)
1977, Circular 751-A
United States Geological Survey projects in Alaska include a wide range of topics of economic and scientific interest. Studies in 1976 include economic geology, regional geology, stratigraphy, environmental geology, engineering geology, hydrology, and marine geology. Discussions of the findings or, in some instances, narratives of the course of the investigations...
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...