Amino acid age estimates of marine terraces and sea levels on San Nicolas Island, California

Research Article| January 01, 1985 Amino acid age estimates of marine terraces and sea levels on San Nicolas Island, California Daniel R. Muhs Daniel R. Muhs 1Department of Geography, University of Wisconsin, Madison, Wisconsin 53706 Search for other works by this author on: GSW Google Scholar Geology (1985) 13 (1): 58–61. https://doi.org/10.1130/0091-7613(1985)13<58:AAAEOM>2.0.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Daniel R. Muhs; Amino acid age estimates of marine terraces and sea levels on San Nicolas Island, California. Geology 1985;; 13 (1): 58–61. doi: https://doi.org/10.1130/0091-7613(1985)13<58:AAAEOM>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 SocietyGeology Search Advanced Search Abstract Fourteen marine terraces rising to an elevation of 274 m have been mapped on San Nicolas Island, California. The lowest terrace is ∼105 000 yr old, on the basis of amino acid ratios in fossil mollusks slightly lower than those from the ∼120 000 yr old, uranium-series dated second terrace. The age estimate and present elevation of the lowest terrace, along with an assumption of constant uplift rate, indicate a paleo–sea-level estimate of −10 to −12 m at about 105 000 B.P., supporting the general Barbados model of sea-level history. The fourth and fifth terraces probably represent separate high sea-level stands during the same interglacial complex ≥400 000 B.P. The eight and tenth terraces have amino acid ratios near equilibrium and imply ages of ≥600 000 yr. Collectively, the data suggest long-term average Quaternary uplift rates of 0.2–0.3 m/1000 yr. 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.