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Page 4614, results 115326 - 115350

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Measured sections and discussion of the main turbidite member, Middle Pennsylvanian Minturn Formation, northern Sangre de Cristo Range, Custer and Saguache counties, Colorado
S. J. Soulliere, B.L. DeAngelis, D. A. Lindsey
1984, Miscellaneous Field Studies Map 1622-B
Turbidites are sediments deposited by turbid density currents. The turbidites described here are interpreted as prodelta deposits that formed in front of fan deltas and alluvial fans during the uplift of the ancestral Rocky Mountains in Pennsylvanian time. Laterally extensive, lenticular sand bodies deposited by turbidity flows crop out in...
Aeromagnetic, Bouguer gravity, and interpretation maps of the Sheep Hole-Cadiz Wilderness Study Area (CDCA-305), San Bernardino County, California
R.W. Simpson, R. E. Bracken, D.J. Stierman
1984, Miscellaneous Field Studies Map 1615-B
The Federal Land Policy and Management Act (Public Law 94-579, October 21, 1976) requires the U.S. Geological Survey and the U.S. Bureau of Mines to conduct mineral surveys on certain areas to determine their mineral resource potential. Results must be made available to the public and be submitted to the President...
Mineral resource potential maps of the Jerry Peak, Jerry Peak West, and Boulder Creek Wilderness Study Areas, Custer County, Idaho
D. H. McIntyre, F. L. Johnson
1984, Miscellaneous Field Studies Map 1466-C
The U.S. Geological Survey and the U.S. Bureau of Mines made a geological and mineral survey of the Jerry Peak, Jerry Peak West, and Boulder Creek Wilderness Study Areas, Custer County, Idaho, from 1980 through 1983. The area is underlain chiefly by lavas and pyroclastic rocks of the Eocene Challis Volcanics....
Reconnaissance geochemical maps of mineralized rocks in the Dragoon Mountains Roadless Area, Cochise County, Arizona
Harald Drewes
1984, Miscellaneous Field Studies Map 1521-D
The Dragoon Mountains of central Cochise County are one of a group of northwest-trending ranges in southeastern Arizona. The Dragoon Mountains have a broad, low southeastern part; a narrow, moderately high central part; and a broad, high, northwestern part. The Dragoon Mountains Roadless Area, about 55 mi2 (104 km2) in...
Geochemical survey of the Lusk Creek Roadless Area, Pope County, Illinois
John S. Klasner, Gordon W. Day
1984, Miscellaneous Field Studies Map 1405-B
The Lusk Creek Roadless Area (Index map) lies along the western edge of the Illinois-Kentucky fluorspar district in which flourite deposits occur as lenticular-type veins emplaced along fult zones or as tratiform-shaped bedding-replacement deposits that occur along fault zones (Grogan and Bradbury, 1967; Trace, 1974). Although mineralogy varies between deposits,...