Latitude: 33°22'37"N
Longitude: 117°2'12"W
Nodules of orbicular gabbro found weathered out of rock on the summit of Hiriart mountain were first described by Kunz in 1905, and later by Schaller in 1911. According to Schaller, these nodules measured from 2 to 2.5 inches in diameter and were composed of olivine, hypersthene, hornblende, feldspar, and iron oxides. He also stated that they had a radiating structure. The deposit was covered by the Vanderberg claim. Elevation approximately 1728' AMSL.
References
Kunz, G. F. (1905), Gems, jeweler's materials, and ornamental stones of California. California State Mining Bureau bulletin 37: pages 86, 129-132.
Schaller, W. T. (1911d), Orbicular gabbro from Pala, San Diego County, California: Amer. Chem. Soc. Jour., vol. 33, p. 162-166.
Weber, F. H., Jr. (1963a), Mines and mineral resources of San Diego County, California; California Division of Mines and Geology, County Report 3, 309 pp.: 201.
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