Isotopic variation in rhythmically bedded chalks: Paleotemperature variation in the Upper Cretaceous

Abstract

Research Article| September 01, 1989 Isotopic variation in rhythmically bedded chalks: Paleotemperature variation in the Upper Cretaceous P. Ditchfield; P. Ditchfield 1Department of Earth Sciences, University of Liverpool, Brownlow Street, P.O. Box 147, Liverpool L69 3BX, England Search for other works by this author on: GSW Google Scholar J. D. Marshall J. D. Marshall 1Department of Earth Sciences, University of Liverpool, Brownlow Street, P.O. Box 147, Liverpool L69 3BX, England Search for other works by this author on: GSW Google Scholar Author and Article Information P. Ditchfield 1Department of Earth Sciences, University of Liverpool, Brownlow Street, P.O. Box 147, Liverpool L69 3BX, England J. D. Marshall 1Department of Earth Sciences, University of Liverpool, Brownlow Street, P.O. Box 147, Liverpool L69 3BX, England Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1989) 17 (9): 842–845. https://doi.org/10.1130/0091-7613(1989)017<0842:IVIRBC>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 P. Ditchfield, J. D. Marshall; Isotopic variation in rhythmically bedded chalks: Paleotemperature variation in the Upper Cretaceous. Geology 1989;; 17 (9): 842–845. doi: https://doi.org/10.1130/0091-7613(1989)017<0842:IVIRBC>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 Detailed sampling at 2 cm intervals of a rhythmically bedded chalk-marl sequence in southeast England has revealed a cyclic variation in oxygen isotopic composition of the carbonate component. These changes are most consistent with paleotemperature fluctuations of up to 4.5 °C. Contrary to some recent models, chalk horizons are interpreted to reflect periods of warmer temperature and higher primary productivity than those responsible for marl deposition. The effects of different faunal content, diagenesis, and variations in the water chemistry can all be discounted. 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.