Abstract
Research Article| September 01, 1970 Time of Completion of Underthrusting of Franciscan beneath Great Valley Rocks West of Salinian Block, California BENJAMIN M PAGE BENJAMIN M PAGE Department of Geology, Stanford University, Stanford, California 94305 Search for other works by this author on: GSW Google Scholar Author and Article Information BENJAMIN M PAGE Department of Geology, Stanford University, Stanford, California 94305 Publisher: Geological Society of America Received: 30 Mar 1970 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1970, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1970) 81 (9): 2825–2834. https://doi.org/10.1130/0016-7606(1970)81[2825:TOCOUO]2.0.CO;2 Article history Received: 30 Mar 1970 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation BENJAMIN M PAGE; Time of Completion of Underthrusting of Franciscan beneath Great Valley Rocks West of Salinian Block, California. GSA Bulletin 1970;; 81 (9): 2825–2834. doi: https://doi.org/10.1130/0016-7606(1970)81[2825:TOCOUO]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Underthrusting of the Franciscan assemblage beneath Great Valley rocks seems to have been completed by the end of the Oligocene in the region west of the Salinian block. Both the Franciscan and Great Valley assemblages are latest Jurassic-Cretaceous in age. Clasts derived from both first appear together in the Vaqueros Formation (Upper Oligocene?-Lower Miocene). The Vaqueros is markedly transgressive and is generally the oldest formation in depositional contact with the Franciscan in the region under discussion. The Vaqueros locally rests on both Franciscan and Great Valley rocks, and extends across a fault separating the two.If Underthrusting ceased before the end of the Oligocene, the timing is compatible with the termination of northeast-southwest relative motion at the continental margin, and the beginning of northwest-southeast relative motion when North America encountered the Main Pacific plate. Much or all activity on the San Andreas fault followed this event. The fault offset the zone of Underthrusting. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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.
