Possible Strike-Slip Faulting in the Southern California Borderland

Abstract

Research Article| February 01, 1974 Possible Strike-Slip Faulting in the Southern California Borderland D. G. Howell; D. G. Howell 1Department of Geological Sciences, University of California, Santa Barbara, Santa Barbara, California 93106 Search for other works by this author on: GSW Google Scholar C. J. Stuart; C. J. Stuart 1Department of Geological Sciences, University of California, Santa Barbara, Santa Barbara, California 93106 Search for other works by this author on: GSW Google Scholar J. P. Platt; J. P. Platt 1Department of Geological Sciences, University of California, Santa Barbara, Santa Barbara, California 93106 Search for other works by this author on: GSW Google Scholar D. J. Hill D. J. Hill 1Department of Geological Sciences, University of California, Santa Barbara, Santa Barbara, California 93106 Search for other works by this author on: GSW Google Scholar Geology (1974) 2 (2): 93–98. https://doi.org/10.1130/0091-7613(1974)2<93:PSFITS>2.0.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation D. G. Howell, C. J. Stuart, J. P. Platt, D. J. Hill; Possible Strike-Slip Faulting in the Southern California Borderland. Geology 1974;; 2 (2): 93–98. doi: https://doi.org/10.1130/0091-7613(1974)2<93:PSFITS>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentBy SocietyGeology Search Advanced Search Abstract The Eocene Poway Conglomerate on San Miguel and San Nicolas Islands and age-equivalent turbidite sands on Santa Rosa Island appear to be parts of a bathyal fan deposit with an apex and source lying east of the halfway point between Santa Rosa and San Nicolas Islands. Palinspastic reconstruction along a proposed East Santa Cruz Basin fault system with 120 to 160 km of right slip aligns this bathyal point source with the compositionally equivalent Eocene river and shallow marine gravels of the type Poway Conglomerate in the San Diego area. Paleocurrent indicators in the Miocene San Onofre Breccia on Santa Cruz Island and the geometry of schist-bearing strata in the subsurface of the Santa Barbara Channel can be explained by right slip of the southern part of Santa Cruz Island from the southeast along the same fault system. Basement rock types in the borderland place no constraints on the proposed reconstruction, although they do constrain models involving large-scale westerly drift. The ridge and basin bathymetry of the central borderland is consistent with a strike-slip tectonic regime. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not currently have access to this article.