Latitude: 37°22'4"N
Longitude: 122°13'55"W
A crushed stone/traprock quarry located 4.1 km (2.5m miles) N of Langley Hill and 1.8 km (6,100 feet) S of Portola Valley (on the opposite side of the San Andreas Fault).
References
Haehl, Harry Lewis & Ralph Arnold (1904), The Miocene diabase of the Santa Cruz Mountains in San Mateo County, California: American Philosophical Society Proceedings: 43: 16-53.
U.S. Bureau of Mines Respondent file (1971).
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 71.
Pemberton, H. Earl (1983), Minerals of California: 370.
California Division of Mines and Geology Special Publication 103, 1990.
Mineral List
1 entry listed. 1 valid mineral.
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