Abstract
Sedimentological studies of the Miocene San Onofre Breccia, which contains blueschist clasts of Catalina Schist facies in abundance, suggest that Catalina-type basement rocks may underlie part of the Santa Barbara Basin north of the Channel Islands. The San Onofre Breccia exposed on Santa Cruz Island was derived from the northeast; this conclusion is based on paleocurrent indicators and a north-eastward increase in blueschist clast size. On Santa Rosa Island, San Onofre Breccia is restricted to the northern tip and the sea floor north of the island; rocks of the same age to the south are of a finer grained, deeper water facies. The size and angularity of San Onofre clasts suggest that the southern margin of the Catalina basement block was near the Santa Cruz Island fault.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
