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Biostratigraphy and Paleotemperatures of a Section Cored on the Nicaragua Rise, Caribbean Sea

1968; Geological Society of America; Volume: 79; Issue: 4 Linguagem: Inglês

10.1130/0016-7606(1968)79[459

1943-2674

Hans M. Bolli, J.E. Boudreaux, Cesare Emiliani, William W. Hay, Robert J. Hurley, James I. Jones,

Geological formations and processes

Research Article| April 01, 1968 Biostratigraphy and Paleotemperatures of a Section Cored on the Nicaragua Rise, Caribbean Sea H. M BOLLI; H. M BOLLI Geology Dept., Swiss federal Institute of' Technology, Zurich, Switzerland Search for other works by this author on: GSW Google Scholar J. E BOUDREAUX; J. E BOUDREAUX Dept. of Geology, University of Illinois, Urbana, Illinois Search for other works by this author on: GSW Google Scholar CESARE EMILIANI; CESARE EMILIANI Institute of Marine Sciences, University of Miami, Miami, Florida Search for other works by this author on: GSW Google Scholar W. W HAY; W. W HAY Dept. of Geology, University of Illinois, Urbana, Illinois Search for other works by this author on: GSW Google Scholar R. J HURLEY; R. J HURLEY Institute of Marine Sciences, University of Miami, Miami, Florida Search for other works by this author on: GSW Google Scholar J. I JONES J. I JONES Institute of Marine Sciences, University of Miami, Miami, Florida Search for other works by this author on: GSW Google Scholar GSA Bulletin (1968) 79 (4): 459–470. https://doi.org/10.1130/0016-7606(1968)79[459:BAPOAS]2.0.CO;2 Article history received: 29 Jul 1966 rev-recd: 06 Feb 1967 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 H. M BOLLI, J. E BOUDREAUX, CESARE EMILIANI, W. W HAY, R. J HURLEY, J. I JONES; Biostratigraphy and Paleotemperatures of a Section Cored on the Nicaragua Rise, Caribbean Sea. GSA Bulletin 1968;; 79 (4): 459–470. doi: https://doi.org/10.1130/0016-7606(1968)79[459:BAPOAS]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 The drilling vesselSubmarex of Global Marine was used to drill and core sediments to a depth of 56.4 m on the Nicaragua Rise, between Walton Bank and Jamaica, in 610 m of water. Seismic reflection profiles revealed thick accumulations of layered sediments with some fossil reefs. The sediments consist of undisturbed layers rich in planktonic microfossils alternating with turbidite layers. Absence of older coccoliths indicates that the redeposited material was not appreciably older than the time of redeposition, and oxygen isotopic analysis of benthonic elements shows that this material was derived from a depth not much shallower. The lower portion of the cored section correlates with the Manchioneal Formation of Jamaica. Taxonornic analysis of the calcareous nannoplankton indicates that the level at 2354 cm correlates with the midportions of the eastern equatorial Pacific cores 58 and 62; with the “Nebraskan-Aftonian” boundary of the Gulf Coast; and with the appearance of Hyalinea baltica at Le Castella, southern Italy. This level, therefore, represents the Plio-Pleistocene boundary as officially designated, and an age of about 700,000 years is estimated for the bou ndary. Oxygen isotopic analysis shows important oscillations, with a full glacial-interglacial amplitude, occurring both above and below the Plio-Pleistocene boundary. 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.