COASTAL EVOLUTION OF SOUTHERN CALIFORNIA AS INTERPRETED FROM BENTHIC FORAMINIFERA, OSTRACODES, AND POLLEN

Abstract

Research Article| July 01, 2011 COASTAL EVOLUTION OF SOUTHERN CALIFORNIA AS INTERPRETED FROM BENTHIC FORAMINIFERA, OSTRACODES, AND POLLEN David B. Scott; David B. Scott 4 1Department of Earth Sciences, Dalhousie University, Halifax, NS B3H 3J5 Canada 4Correspondence author. E-mail: dbscott@dal.ca Search for other works by this author on: GSW Google Scholar Peta J. Mudie; Peta J. Mudie 1Department of Earth Sciences, Dalhousie University, Halifax, NS B3H 3J5 Canada2Geological Survey Canada Atlantic, Box 1006, Dartmouth, NS B2Y 4A2 Canada Search for other works by this author on: GSW Google Scholar John S. Bradshaw John S. Bradshaw 3Deceased; 5062 Alicante Way, Oceanside, California 92056 USA Search for other works by this author on: GSW Google Scholar Author and Article Information David B. Scott 4 1Department of Earth Sciences, Dalhousie University, Halifax, NS B3H 3J5 Canada Peta J. Mudie 1Department of Earth Sciences, Dalhousie University, Halifax, NS B3H 3J5 Canada2Geological Survey Canada Atlantic, Box 1006, Dartmouth, NS B2Y 4A2 Canada John S. Bradshaw 3Deceased; 5062 Alicante Way, Oceanside, California 92056 USA 4Correspondence author. E-mail: dbscott@dal.ca Publisher: Cushman Foundation for Foraminiferal Research Received: 16 Feb 2010 Accepted: 06 Dec 2010 First Online: 03 Mar 2017 Online ISSN: 1943-264X Print ISSN: 0096-1191 © 2011 Journal of Foraminiferal Research Journal of Foraminiferal Research (2011) 41 (3): 285–307. https://doi.org/10.2113/gsjfr.41.3.285 Article history Received: 16 Feb 2010 Accepted: 06 Dec 2010 First Online: 03 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 David B. Scott, Peta J. Mudie, John S. Bradshaw; COASTAL EVOLUTION OF SOUTHERN CALIFORNIA AS INTERPRETED FROM BENTHIC FORAMINIFERA, OSTRACODES, AND POLLEN. Journal of Foraminiferal Research 2011;; 41 (3): 285–307. doi: https://doi.org/10.2113/gsjfr.41.3.285 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 SocietyJournal of Foraminiferal Research Search Advanced Search Abstract Three paleoecological studies were conducted on five lagoons and marshes in San Diego County in 1973–1975 and initial results were published in 1976. This paper integrates the earlier results with new palynological evidence, microfossil, and sedimentological data to provide a regional perspective of lagoon, salt-marsh, and climate changes in southern California over the past 8000 years. Foraminiferal species are illustrated and a revised taxonomy is presented. Ostracodes in the surface samples and boreholes of this region are illustrated for the first time.Surface sample data show the relation between microfossil faunal assemblages, modern salinity, tidal exchange, water depth, and salt-marsh elevation in open lagoons at Tijuana estuary, San Diego and Mission bays, and Agua Hedionda, and for hypersaline-to-brackish marshes in the Los Peñasquitos wetlands. Drillhole lithofacies in Los Peñasquitos, Tijuana, and Mission Bay marshes were dated with seven radiocarbon ages in addition to those published in 1976. The microfossil surface sample data were used to interpret the drillhole records, showing the paleoecological evolution of the wetlands and the variation within and between lagoons located less than 40 km apart. Abundances of planktonic and other nearshore foraminifera show that Los Peñasquitos lagoon was much more open in the mid-Holocene compared to today. Palynological data provide the first documentation of mangrove migration as far north as San Diego in the mid-Holocene, which implies warmer winters and wetter summers at that time. Palynostratigraphic data also permit refined timing of recent changes (past 300 years) in lagoonal environments based on use of historical dates for introduced plant species. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.