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Hertzig Marble Quarry No. 1, Kentucky House, San Andreas District, Mother Lode Belt, Calaveras Co., California, USA
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Latitude: 38°10'13"N
Longitude: 120°40'28"W
 
 
A marble (dimension) deposit located in sec. 29, T4N, R12E, MDM, 0.7 km (0.5 mile) NW of Kentucky House, and 3.2 km (2.0 miles) S of San Andreas (near the site of the alaveras Cement Company's plant - N of it). MRDS database stated accuracy for this location is 1,000 meters. Quarry Nop. 1 was chief source of raw material. It was closed but reopened in 1956. Quarry No. 2 is apparently father N from the plant.

Mineralization is a metamorphic marble deposit. Limestone lens occurs in the Carboniferous Calaveras Formation. Two major lenses of high-calcium limestone lie on the W side of an extensive body of dolomite. The limestone is fine-grained, medium to dark bluish gray in color, and often stylolitic. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada) and/or Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains).

Workings include unspecified surface openings.

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References

Logan, Clarence August and Franke, H. (1936), Mines and Mineral Resources of Calaveras Co.: California Division of Mines, California Journal of Mines & Geology, California Division of Mines (Report 32): 32(3): 227.

Logan, Clarence August (1947), Limestone in California: California Journal of Mines and Geology, California Division Mines (Report 43): 43(3): 219.

California Division of Mines (1962): Mineral Information Service: 15(8): 1-2.

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]: 97-98.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10028896 & 10138046.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060091178.

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