Carbonate Sedimentation in the Abyssal Equatorial Pacific During the Past 50 Million Years

Abstract

Research Article| April 01, 1969 Carbonate Sedimentation in the Abyssal Equatorial Pacific During the Past 50 Million Years G. ROSS HEATH G. ROSS HEATH Department of Oceanography, Oregon State University, Corvallis, Oregon Search for other works by this author on: GSW Google Scholar Author and Article Information G. ROSS HEATH Department of Oceanography, Oregon State University, Corvallis, Oregon Publisher: Geological Society of America Received: 11 Sep 1968 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1969, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1969) 80 (4): 689–694. https://doi.org/10.1130/0016-7606(1969)80[689:CSITAE]2.0.CO;2 Article history Received: 11 Sep 1968 First Online: 02 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 G. ROSS HEATH; Carbonate Sedimentation in the Abyssal Equatorial Pacific During the Past 50 Million Years. GSA Bulletin 1969;; 80 (4): 689–694. doi: https://doi.org/10.1130/0016-7606(1969)80[689:CSITAE]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 SocietyGSA Bulletin Search Advanced Search Abstract Early and middle Tertiary deep-sea carbonates from the equatorial Pacific differ in both texture and depth distribution from younger deposits. Pre-Pliocene carbonates are well sorted. They are dominated by the remains of nannoplankton, and have median grain diameters very close to 5 microns. In contrast, Pliocene and Quaternary deposits are poorly sorted. They are frequently rich in the tests of Foraminifera, and have median diameters ranging from about 1 to more than 60 microns (part of the variation probably resulting from sorting at, or near, the sea floor).The calcite compensation level, now close to 4700 m, has risen from a depth of more than 5200 m since the Oligocene. The rise reflects,at least in part, the effect of decreasing bottom water temperatures on the solubility of calcium carbonate. 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.