Unnamed Cr occurrence [7], Hog Mountain, Fresno Co., California, USA
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Local rocks include ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains).
The chromite deposits of Watts Valley occur on the eastern limb of a synclinal, NE-plunging, ultramafic sill. The eastern limb, known as Hog Mountain, is a little over 1 mile wide, while the western limb, which forms Red Mountain, averages 3 miles wide. The 2 limbs join to the NW and together form a discontinuous, triangular exposure of peridotite 10 miles long and 8 miles wide across the base.
Mineral List
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References
California Division of Mines Economic Mineral Map of California No. 3 - Chromium (1942).
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10138954.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060190212.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10138954.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060190212.