New Melones Lake spillway

occurrence of asbestos in Calaveras county, CA

Geologic information

Name of siteNew Melones Lake spillway
Developmentoccurrence
StateCA
CountyCalaveras
Geographic location:-120.531, 37.946
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Fibrous mineralActinolite commonly occurs as white to very pale-green flexible fibers in areas 1 and 3 as well as in many of the other smaller veins. In area 1, fibrous crystals to 1 cm cover areas up to 60 x 30 cm and occur with albite to form attractive plates. Actinolite has also been found in one vein south of area 3 as flexible, long-fibered (up to 15 cm) parallel aggregates."" (Pohl and others, 1982, p. 297)
Associated mineralsferroaxinite
albite
calcite
chlorite
epidote
quartz
Host rock typesmetagabbro, metabasalt
Geologic map unit-120.531, 37.946
Nearby scientific dataFind additional scientific data near this location

Reference information

Pohl, Demetrius, Guillemette, Renald, Shigley, James, and Dunning, Gail, 1982, Ferroaxinite from New Melones Lake, Calaveras County, California, a remarkable new locality: The Mineralogical Record, v. 13, no. 5, 293-302.