Neogene clockwise tectonic rotation of the eastern Transverse Ranges, California, suggested by paleomagnetic vectors

Research Article| February 01, 1987 Neogene clockwise tectonic rotation of the eastern Transverse Ranges, California, suggested by paleomagnetic vectors JAMES N. CARTER; JAMES N. CARTER 1Department of Geological Sciences, University of California-Santa Barbara, Santa Barbara, California 93106 Search for other works by this author on: GSW Google Scholar BRUCE P. LUYENDYK; BRUCE P. LUYENDYK 1Department of Geological Sciences, University of California-Santa Barbara, Santa Barbara, California 93106 Search for other works by this author on: GSW Google Scholar RICHARD R. TERRES RICHARD R. TERRES 1Department of Geological Sciences, University of California-Santa Barbara, Santa Barbara, California 93106 Search for other works by this author on: GSW Google Scholar Author and Article Information JAMES N. CARTER 1Department of Geological Sciences, University of California-Santa Barbara, Santa Barbara, California 93106 BRUCE P. LUYENDYK 1Department of Geological Sciences, University of California-Santa Barbara, Santa Barbara, California 93106 RICHARD R. TERRES 1Department of Geological Sciences, University of California-Santa Barbara, Santa Barbara, California 93106 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1987) 98 (2): 199–206. https://doi.org/10.1130/0016-7606(1987)98<199:NCTROT>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation JAMES N. CARTER, BRUCE P. LUYENDYK, RICHARD R. TERRES; Neogene clockwise tectonic rotation of the eastern Transverse Ranges, California, suggested by paleomagnetic vectors. GSA Bulletin 1987;; 98 (2): 199–206. doi: https://doi.org/10.1130/0016-7606(1987)98<199:NCTROT>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 Results from a paleomagnetic study of Neogene volcanic rocks situated within and around the Pinto basin region of the eastern Transverse Ranges suggest that the ranges have undergone a clockwise tectonic rotation of ∼41.4° ± 7.7° since late Miocene time. Both normal and reversed polarities are observed, and inclination data indicate no significant flattening. The rotation was accompanied by progressive sinistral slip on the several east-west–trending faults which bound and transect the eastern Transverse Ranges. A computation using the observed amount of cumulative left slip on the east-west–trending faults of the eastern Transverse Ranges (∼50 km) and the spacing between the Pinto Mountain and Salton Creek faults which bound the region (∼70 km) indicates that ∼35° of clockwise rotation is required, which roughly agrees with the paleomagnetic data. Removal of the eastern Transverse Ranges rotation in a reconstruction shows that the distributed dextral shear across the Mojave Desert region to the north must have been on the order of 100 km since late Miocene time. From the results of this study, we infer that crustal rotation of the eastern Transverse Ranges began later and is of less magnitude than that of the western Transverse Ranges. 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.