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Page 35, results 851 - 875

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Geochemical maps showing distribution and abundance of manganese in two fractions of stream-sediment concentrates, Silver City 1 degree by 2 degrees Quadrangle, New Mexico and Arizona
Kenneth C. Watts, Jerry R. Hassemer, Carl L. Forn, David F. Siems
1986, Miscellaneous Field Studies Map 1183-J
These maps (Maps A and B) show the distribution and abundance of maganese in the nonmagnetic and magnetic fractions of heavy-mineral concentrates from stream sediments collected in the Silver City 1o x 2o quadrangle, New Mexico and Arizona. Geochemical maps showing the distribution and abundance of 10 other selected key elements and the mineral...
Estimated resources of non-leased federal coal, Powder River Basin, Montana and Wyoming
V. A. Trent
1986, Miscellaneous Field Studies Map 1887
Maps are generated by combining digital ownership data with geologic resource estimates and other spatial coal data in a geographic information system (GIS). For example, we merged the newly compiled Federal coal ownership files with resource calculations from the 1970's for the Powder River Basin (Trent, 1986). For the first...
Summary geochemical maps for samples of rock, stream sediment, and nonmagnetic heavy-mineral concentrate, Sweetwater Roadless Area, Mono County, California and Lyon and Douglas Counties, Nevada
Maurice A. Chaffee
1986, Miscellaneous Field Studies Map 1535-C
The Sweetwater Roadless Area lies between Yerington, Nevada, and Bridgeport, California, along the California-Nevada boundary. The area encompasses approximately 72,240 acres in Toiyabe National Forest in Mono County, California, and Lyon and Douglas Counties, Nevada. This roadless area, which lies just east of the Sierra Nevada range, exhibits rugged topography. Elevations...
Metallogenic map of volcanogenic massive-sulfide occurrences in New Mexico
J. M. Robertson, M.S. Fulp, M.D. Daggett
1986, Miscellaneous Field Studies Map 1853-A
New Mexico volcanogenic massive-sulfide occurrences, which typically contain pyrite and pyrrhotite accompanied by variable amounts of base-metal sulfides and precious metals, are found within mainly subaqueous, compositionally bimodal metavolcanic successions of Early to Middle Proterozoic age that are exposed primarily in the north-central part of the state. Host rocks include...
Summary geochemical maps for samples of rock, stream sediment, and nonmagnetic heavy-mineral concentrate, Cypress Roadless Area, Kern County, California
M.A. Chaffee, D.L. Fey, R. H. Hill, S. J. Sutley
1986, Miscellaneous Field Studies Map 1532-B
The Cypress Roadless Area comprises approximately 3 square miles (1,949 acres) of Sequoia National Forest, Kern County, California. The area is at the southern end of the Sierra Nevada, approximately 30 miles east-northeast of Bakersfield, and 2.5 miles and 3.5 miles south-southeast of the communities of Bodfish and Lake Isabella,...
Geochemical map of the North Fork John Day River Roadless Area, Grant County, Oregon
James G. Evans
1986, Miscellaneous Field Studies Map 1581-B
The Wilderness Act (Public Law 88-577, September 3, 1964) and related acts require the U.S. Geological Survey and the U.S. Bureau of Mines to survey certain areas on Federal lands to determine their mineral resource potential. Results must be made available to the public and submitted to the President and the...
Maps showing geology, geochemistry, and mineral resources assessment of the Rough Mountain Roadless Area, Alleghany and Bath counties, Virginia
Frank G. Lesure, Suzanne W. Nicholson
1986, Miscellaneous Field Studies Map 1811
The Rough Mountain Roadless Area comprises about 9,300 acres of George Washington National Forest land in the Valley and Ridge province in west-central Virginia. The area, which is about 6 mi long and 2 mi wide, is in Bath and Alleghany Counties, about 3 mi south of Millboro Springs, Va....
Seismic-reflection profiles of the New Madrid seismic zone-data along the Mississippi River near Caruthersville, Missouri
A. J. Crone, S.T. Harding, D. P. Russ, K. M. Shedlock
1986, Miscellaneous Field Studies Map 1863
The tectonic setting and the earthquake hazards of the New Madrid seismic zone in the northern Mississippi embayment have been the subject of intensive study the past several years as part of the Earthquake Hazard Reduction Program of the USGS (U.S. Geological Survey). These efforts have improved our knowledge of...