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dc.contributor.author Boundy-Sanders, Susan Q. en
dc.contributor.author Vedder, John G. en
dc.contributor.author Sanders, Christopher O. en
dc.contributor.author Howell, David G. en
dc.date.accessioned 2011-02-09T18:30:09Z en
dc.date.available 2011-02-09T18:30:09Z en
dc.date.issued 1993 en
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
dc.identifier.uri http://hdl.handle.net/10139/3163 en
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
dc.language.iso en_US en
dc.publisher National Park Service en
dc.subject geology en
dc.subject Channel Islands en
dc.subject California Islands en
dc.subject igneous rock en
dc.title Miocene Geologic History of Eastern Santa Catalina Island, California en
dc.type Article en

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