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Page 4729, results 118201 - 118225

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Reconnaissance geologic map of the Selway-Bitterroot Wilderness, Idaho County, Idaho, and Missoula and Ravalli counties, Montana
Margo I. Toth
1983, Miscellaneous Field Studies Map 1495-B
The Selway-Bitterroot Wilderness covers about 1.25 million acres in east-central Idaho and western Montana (fig. 1). The wilderness lies across the Bitterroot Range, which forms the boundary between Idaho and Montana, and includes large portions of the drainages of the Selway, Lochsa, and Bitterroot Rivers. Elevations range from 1,800 ft...
Mineral resource potential map of the Dolly Ann Roadless Area, Alleghany County, Virginia
Frank G. Lesure, Jay G. Jones
1983, Miscellaneous Field Studies Map 1358-D
The Dolly Ann Roadless Area comprises 7,900 acres (3,200 ha) in the George Washington National Forest in the Valley and Ridge physiographic province of west-central Virginia. The area is at the southern ·end of Warm Springs Mountain in Alleghany County just northeast of Covington, the county seat (index map). U.S....
Map and interpretation of geochemical anomalies in the White Mountains, Blanco Mountain, Birch Creek, and Black Canyon Roadless Areas, White Mountains, California and Nevada
Michael F. Diggles
1983, Miscellaneous Field Studies Map 1361-B
The geochemical results show the most anomalous part of the study area to be the White Mountain Fault zone along the northwestern range front.  Silver, lead, and zinc mineralization in calcareous rocks, porphyry copper in dikes, gold-arsenic quartz vein deposits, tungsten and molybdenum tactite mineralization, and argillic alteration zones are...
Mineral resource potential map of the Chama River Canyon Wilderness and contiguous roadless area, Rio Arriba County, New Mexico
Jennie L. Ridgley, Thomas D. Light
1983, Miscellaneous Field Studies Map 1523-B
The Chama River Canyon Wilderness and Roadless Area have a moderate to high potential for the presence of small deposits of copper with associated uranium and silver. These deposits, as yet undetected, would occur in the Permian Cutler Formation and in the lower part of the Triassic Chinle Formation, rock units that...
Isopach and structure contour maps of the Burro Canyon(?) Formation in the Chama-El Vado Area, Chama Basin, New Mexico
Jennie L. Ridgley
1983, Miscellaneous Field Studies Map 1496-C
In the Chama Basin a wequence of conglomerate, sandstone, and red, gray-green, and pale-purple mudstone occurs stratigraphically between the Upper Jurassic Morrison Formation and Upper Cretaceous Dakota Sandstone. This stratigraphic interval has been called the Burro Canyon Formation by several workers (Craig and others, 1959; Smith and others, 1961; Saucier,...
Isopach and structure contour maps of the Burro Canyon(?) Formation in the Mesa Golondrina and Mesa de los Viejos areas, Chama Basin, New Mexico
Jennie L. Ridgley
1983, Miscellaneous Field Studies Map 1496-A
In the Chama Basin a wequence of conglomerate, sandstone, and red, gray-green, and pale-purple mudstone occurs stratigraphically between the Upper Jurassic Morrison Formation and Upper Cretaceous Dakota Sandstone. This stratigraphic interval has been called the Burro Canyon Formation by several workers (Craig and others, 1959; Smith and others, 1961; Saucier,...
Maps showing selected geology and phosphate resources of the Upper Valley quadrangle, Caribou County, Idaho
Pamela Dunlap Derkey, Pamela Palmer, Nancy J. Wotruba
1983, Mineral Investigations Resource Map 71
This report summarizes information on the thickness, grade, lateral continuity, phosphate resources, and ownership of phosphate-bearing units in the Meade Peak Phosphatic Shale Member of the Phosphoria Formation in the Upper Valley quadrangle. This report is one of a series of quadrangle reports prepared by the Idaho Bureau of Mines...
Aeromagnetic map of the Powderhorn wilderness study area and Cannibal Plateau Roadless Area, Gunnison and Hinsdale counties, Colorado
R.A. Martin, William N. Sharp
1983, Miscellaneous Field Studies Map 1483-B
The Powderhorn Wilderness Study Area (51,000 acres or 20,640 hectares) and the contiguous Cannibal Plateau Roadless Area (29,500 acres or 11,959 hectares) are on the Gunnison County-Hinsdale County boundary, approximately 50mi (80 km) southwest of Gunnison and a few miles east of Lake City, Colo. Part of the area has...
Mineral resource potential map of the Raywood Flat Roadless Areas, Riverside and San Bernardino counties, California
Jonathan C. Matti, Brett F. Cox, Stephen R. Iverson
1983, Miscellaneous Field Studies Map 1563-A
Geologic, geochemical, and geophysical studies within the Raywood "Flat Roadless Areas, together with an investigation of mines and prospects within the further planning area, resulted in (1) identification of nonmetallic mineral resources at a marble mine in the further planning area and (2) recognition of a small area in the...