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Eclipse Quarry, Mokelumne Hill, Mokelumne Hill District, East Belt, Calaveras Co., California, USA

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A former stone quarry operation located in the NE¼ sec. 25, T5N, R11E, MDM, about 4.6 km (2½ miles) S of Mokelumne Hill (town). MRDS database stated accuracy for this location is 100 meters.

NOTE: Alternate coordinates provided: 120.71712W, 38.2538N.

Mineralization is mica-quartz schist capped by 2 feet of overburden. Verical schistosity. Well-segregated bands of muscovite (2% of rock), and quartz give the rock good fissility. Local rocks include Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains) and/or Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).

Workings include surface openings comprised of a shallow cut in the hillside opened in 1957. The face is 6 feet high, 20 feet long. Product intended for use as garden stone.

Mineral List



1 entry listed. 1 valid mineral.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Clark, Wm. B. & P.A. Lydon (1962), Mines and mineral resources of Calaveras County, California: California Division of Mines & Geology County Report 2; [… Geological Society of America Proceedings, 1933: 312-313, 1934]: 214, Pl. D.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10028729 & 10187009.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060090327.

 
Mineral and/or Locality  
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