Pleistocene History of Bermuda

Abstract

Research Article| August 01, 1967 Pleistocene History of Bermuda LYNTON S LAND; LYNTON S LAND California Institute of Technology, Pasadena, California Search for other works by this author on: GSW Google Scholar FRED T MACKENZIE; FRED T MACKENZIE Bermuda Biological Station for Research, St. George's West, Bermuda, and Northwestern University, Evanston, Illinois Search for other works by this author on: GSW Google Scholar STEPHEN J GOULD STEPHEN J GOULD Columbia University, New York, New York Search for other works by this author on: GSW Google Scholar GSA Bulletin (1967) 78 (8): 993–1006. https://doi.org/10.1130/0016-7606(1967)78[993:PHOB]2.0.CO;2 Article history received: 24 Jun 1966 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 LYNTON S LAND, FRED T MACKENZIE, STEPHEN J GOULD; Pleistocene History of Bermuda. GSA Bulletin 1967;; 78 (8): 993–1006. doi: https://doi.org/10.1130/0016-7606(1967)78[993:PHOB]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 Pleistocene rocks of Bermuda consist of shallow-water, beach, and intertidal marine biocalcarenites; eolianites; and red soils, displaying complex facies relationships. Eolianites grade laterally into marine biocalcarenites, indicating deposition during times of high sea level, or interglacial episodes. During glacial times, red soils formed over the present area of Bermuda. Because no evidence for Pleistocene tectonism has been discerned, the Bermuda Islands may represent a good "tide gauge" for the assessment of Pleistocene eustasy.The determination of Bermudian stratigraphy requires recognition of environments of deposition and interpretation of the subsequent diagenetic history of the various units. Bermudian marine biocalcarenites can be distinguished from eolianites. The two red soils represent solutional unconformities, during which time fresh-water percolation induced diagenesis in the underlying rocks. Bermudian calcarenites can be divided into five diagenetic grades, representing increasing intensity of fresh-water alteration. Fossil land snails provide some criteria for the recognition of units.Radiochemical dates are available for most formations and allow a quantitative assessment of Pleistocene eustasy for the last 200,000 years. Bermudian stratigraphy records sea-level fluctuations and can only be interpreted rationally as the result of Pleistocene eustasy. 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.