Moccasin area

outcrops of asbestos in Tuolumne county, CA

Geologic information

Name of siteMoccasin area
Developmentoutcrops
StateCA
CountyTuolumne
Geographic location:-120.349, 37.84
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Fibrous mineralRiebeckite occurs most commonly as irregular bundles of elongate prisms, pseudomorphous after hornblende, and as fine needles in groundmass....In altered phyllitic rocks it forms felted to nematoblastic aggregates, commonly preferentially replacing specific beds or lamellae."" (Albino, 1995, p. 387)
Associated mineralsalbite
Host rock typesaltered phyllitic rocks
Geologic map unit-120.349, 37.84
Nearby scientific dataFind additional scientific data near this location

Reference information

Albino, G.V., 1995, Sodium metasomatism along the Melones Fault Zone, Sierra Nevada Foothills, California, USA: Mineralogical Magazine, v. 59, no. 3, p. 383-399.
[http://minmag.geoscienceworld.org/cgi/content/abstract/59/3/383]