Geology of the Ramona pegmatites, San Diego County, California
The Ramona pegmatite district of central San Diego County, California, has been known as a source of gem garnet, tourmaline, and topaz since the early 1900's. All the occurrences of known commercial importance lie within an area of about 1.5 square miles. The dominant rocks of the district a...
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https://thesis.library.caltech.edu/3660/1/Simpson_dr_1960.pdfhttps://thesis.library.caltech.edu/3660/2/Simpson_dr_1960_plate_1.pdf
https://thesis.library.caltech.edu/3660/3/Simpson_dr_1960_plate_2.pdf
https://thesis.library.caltech.edu/3660/4/Simpson_dr_1960_plate_3.pdf
https://thesis.library.caltech.edu/3660/5/Simpson_dr_1960_plate_4.pdf
Simpson, Dale Rodekohr (1960) Geology of the Ramona pegmatites, San Diego County, California. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/65DM-QT70. https://resolver.caltech.edu/CaltechETD:etd-09202006-111427 <https://resolver.caltech.edu/CaltechETD:etd-09202006-111427>