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Research about Modoc County, Shasta County, Siskiyou County, California

Source-linked reports with geographic coverage including Modoc County, Shasta County, Siskiyou County, California.

2 recordsLinked to original sources

Mineral resource potential of the Baker-Cypress BLM Instant Study Area and Timbered Crater Forest Service Further Planning (RARE II) Areas, Modoc, Shasta, and Siskiyou Counties, California

In accordance with the provisions of the Federal Land Policy and Management Act (Public Law 94-579, October 21, 1976), the Geological Survey and the Bureau of Mines have conducted mineral surveys on certain areas, which formally had been identified as "natural" and "primitive" areas prior to November 1, 1975. The Wilderness Act (Public Law 88-577, September 3, 1964) and related Acts, r equire the Geological Survey and the 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. These maps and reports present the results of a geological and mineral survey of the Baker-Cypress BLM Instant Study Area and Timbered Crater Forest Service Further Planning (RARE II) areas. The study areas have no potential for metallic commodities as determined from spectrographic analyses of rocks (Peterson, 1980). Several localities within the study areas, however, contain stone that can be used for decorative purposes in building construction . The study areas may also have geothermal potential, but at this time quantitative data are unavailable.

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Map showing aeromagnetic interpretation of the Baker-Cypress BLM Instant Study Area and Timbered Crater Forest Service Further Planning Areas, Modoc, Shasta, and Siskiyou counties, California

The data for the aeromagnetic map of the Baker-Cypress and Timbered crater areas were collected in 1978 and compiled at a scale of 1 :62,500 (U,S, Geological Survey, 1979). East-west traverses were spaced at 0.8-km intervals at a constant altitude of 1370 m (4500 ft) above sea level, Contour interval is 20 and 100 gammas, depending upon the steepness of local gradients in the Earth's magnetic field. A regional magnetic field (the International Geomagnetic Reference Field - 1975, updated to the month flown) of approximately 5-6 gammas/km was removed from the data be fore con touring.

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