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Martin L. Sorensen

Publications and source records attributed to Martin L. Sorensen.

8 recordsLinked to original sources

Geologic map of the South Jackson Mountains Wilderness Study Area, Humboldt County, Nevada

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 values, if any, that may be present. Results must be made available to the public and be submitted to the President and the Congress. This report presents the results of a mineral survey of the South Jackson Mountains (NV-020-603) Wilderness Study Area, Humboldt County, Nevada. The South Jackson Mountains Wilderness Study Area is in south-central Humboldt County, approximately 50 miles northwest of Winnemucca, Nevada. The boundaries originally specified for the wilderness study area encompassed an area of 60,211 acres. The draft Environmental Impact Statement issued in 1983 by the U.S. Bureau of Land Management (BLM) identified 20,094 acres within the wilderness study area as potentially suitable for inclusion into the National Wilderness Preservation System. Subsequent (August 27, 1984) deletions by the BLM have resulted in the present study area of approximately 10,300 acres. The boundaries of the study area are approximated by the range crestline to the east and the 4,400-ft contour along the west side of the range from King Lear Peak north to the divide between Hobo and Christiorsson Canyons.

Nevada

Map showing geochemical summary for the Bald Rock and Middle Fork Feather River Roadless Areas, Butte and Plumas counties, California

The Bald Rock Roadless Area consists of 3,850 acres in Butte County, Calif. The Middle Rock Feather River Roadless Area consists of 29,300 acres ub Butte and Plumas Counties, Calif. Both roadless areas are in the Plumas National Forest and are on the west slope of the northern Sierra Nevada southwest of Quincy, Calif. (fig. 1). The two roadless areas are alined along the Middle Fork of the Feather River where they include the narrow canyon bottoms and precipitous sidewalls of the Middle Fork and several tributary drainages. Altitudes range from 800 ft in the canyon of the Middle Fork to approximately 6,600 ft at the northwest corner of the map area. The geology of the roadless areas has been briefly summarized by Sorenson and Pietropaoll (1982). This paper summarizes and interprets the semiquantitative emission spectrographic analyses of 106 rock sample and 165 samples of nonmagnetics heavy-mineral stream-sediment concentrates from the Blad Rock and Middle Fork Feather River Roadless Area (Sorenson and others, 1982).

California

Map showing geochemical analyses of panned stream sediments, Stansbury Roadless Areas, Tooele County, Utah

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 be submitted to the Administration and the Congress. This report presents the results of a geochemical survey of the Stansbury Roadless Areas, Tooele County, Utah. Part of this area was classified a Further Planning Area during the Second Roadless Area Review and Evaluation (RARE II) by the U.S. Forest Service, January 1979.

Utah