A canyon located 4.4 km (2.7 miles) E of Bonsall. A possible gemstone occurrence located in the E½ sec. 27, T10S, R3E, SBM, near Bonsall.
References
Hanks, Henry Garber (1884), Fourth report of the State Mineralogist: California Mining Bureau. Report 4, 410 pp. (includes catalog of minerals of California pp. 63-410), and miscellaneous observations on mineral products): 62.
Kunz, G. F. (1905), Gems, jeweler's materials, and ornamental stones of California. California State Mining Bureau bulletin 37, page 62.
Merrill, F. J. H. (1914), Geology and Mineral Resources of San Diego and Imperial Counties: Gems, Lithia Minerals. California State Mining Bureau, San Francisco, Cal. California State Printing Office, December. Chapter 1, page 72.
Murdoch, Joseph & Webb, Robert W. (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 238, 372.
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