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dc.contributor.author Boundy-Sanders, Susan Q.
dc.contributor.author Vedder, John G.
dc.contributor.author Sanders, Christopher O.
dc.contributor.author Howell, David G.
dc.date.accessioned 2011-02-09T18:30:09Z
dc.date.available 2011-02-09T18:30:09Z
dc.date.issued 1993
dc.identifier.citation Boundy-Sanders, Susan Q., John G. Vedder, Christopher O. Sanders and David G. Howell. "Miocene Geologic History of Eastern Santa Catalina Island, California." In: 3rd California Islands Symposium. 1987. 3-14. en_US
dc.identifier.uri http://hdl.handle.net/10139/3163
dc.description.abstract Field relations show that the Santa Catalina Island pluton intruded both the Catalina Schist and the San Onofre Breccia. Early to middle Miocene macrofossils from the San Onofre Breccia of East End Quarry support the 19 Ma radiometric age of the pluton and show that the San Onofre Breccia of East End Quarry is one of the oldest known exposures of that formation. The pluton includes about 50% subvertical sheeted dikes. We believe that the pluton was initially emplaced into a rhombochasm-like opening along a transtensional fault segment that separated the Catalina Schist from the San Onofre Breccia. Present exposures represent a moderately shallow level of the intrusion. West of Silver Canyon, map relations and several outcrops show that the pluton overlies the Catalina Schist along a low-angle fault. en_US
dc.language.iso en_US en_US
dc.publisher National Park Service en_US
dc.subject geology en_US
dc.subject Channel Islands en_US
dc.subject California Islands en_US
dc.subject igneous rock en_US
dc.title Miocene Geologic History of Eastern Santa Catalina Island, California en_US
dc.type Article en_US


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