Expanded record of Quaternary oceanographic change: Amerasian Arctic Ocean

Research Article| February 01, 1996 Expanded record of Quaternary oceanographic change: Amerasian Arctic Ocean S. E. Ishman; S. E. Ishman 1U.S. Geological Survey, Reston, Virginia 22092 Search for other works by this author on: GSW Google Scholar L. V. Polyak; L. V. Polyak 2Byrd Polar Research Center, Columbus, Ohio 43210 Search for other works by this author on: GSW Google Scholar R. Z. Poore R. Z. Poore 1U.S. Geological Survey, Reston, Virginia 22092 Search for other works by this author on: GSW Google Scholar Geology (1996) 24 (2): 139–142. https://doi.org/10.1130/0091-7613(1996)024<0139:EROQOC>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation S. E. Ishman, L. V. Polyak, R. Z. Poore; Expanded record of Quaternary oceanographic change: Amerasian Arctic Ocean. Geology 1996;; 24 (2): 139–142. doi: https://doi.org/10.1130/0091-7613(1996)024<0139:EROQOC>2.3.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 Four sediment cores collected from the Northwind and Mendeleyev ridges, Arctic Ocean, from 1089 m to 1909 m water depth, provide an oceanographic record extending back into the Matuyama reversed polarity chron. Benthic foraminiferal analyses show four prominent assemblage zones: Bolivina arctica, Cassidulina teretis, Bulimina aculeata, and Oridorsalis tener from the upper Matuyama reversed polarity chronozone through the Brunhes normal polarity chronozone. These assemblage zones represent depth-dependent benthic foraminiferal biofacies changes associated with oceanographic events that occurred in the Amerasian basin at ∼780 and 300 ka, and indicate oceanographic influence from the North Atlantic. Recognition of these benthic assemblage zones in Arctic cores from the Alpha Ridge indicates that the benthic foraminiferal zonations in intermediate to deep water (>1000 m) Arctic cores may be more useful than preexisting lithostratigraphic zonations and should provide important information pertaining to the Quaternary paleoceanographic evolution of the Arctic Ocean. 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.