Pleistocene facies of Belize barrier and atoll reefs

Gischler, Eberhard (2007) Pleistocene facies of Belize barrier and atoll reefs. Facies, 53 (1). pp. 27-41. ISSN 0172-9179

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    Abstract

    The knowledge of Pleistocene reef facies of Belize, Central America, is largely limited to outcrops in the northernmost part of the country. Otherwise, Pleistocene limestone, which forms the basement of the modern barrier and atoll reefs, occurs in the subsurface and is to a major extent unstudied. Based on the study of 40 m of core from 25 rotary core holes collected on central and southern Belize barrier and on atoll reefs, five Pleistocene reef facies are distinguished in the present study. They include (1) Acropora palmata grainstone, (2) Acropora cervicornis grainstone, (3) biogenic grainstone, (4) mollusk packstone, and (5)mollusk-foram wackestone. Facies 1 and 3 occur on marginal reefs, facies 2 is found on marginal and lagoonal reefs, and facies 4 and 5mark lagoon shoals and lagoons, respectively. Most of the facies have equivalents in the Pleistocene of the wider Caribbean and also in the modern of the study area. Diagenetic features include dissolution, caliche formation, laminated blocky low-magnesium-calcite and dogtooth spars. Age data from Pleistocene corals obtained during earlier studies are discussed, and indicate deposition during marine isotope stage 5, between 140–80 ka bp.

    Item Type: Peer-reviewed Journal Article
    Related URLs:
    Unique ID or DOI: 10.1007/s10347-006-0086-9
    Publisher: Springer Verlag
    Keywords: Belize . Pleistocene . Reef . Carbonates
    Subjects: (C) Ecosystems > (CB) Marine > (CBA) Coral Reefs
    (Z) Other or Unspecified
    Publication Sources: (3) Other Source > (3D) Other or Unspecified
    Date Deposited: 09 Dec 2010 10:02
    Last Modified: 20 Jan 2011 14:29
    URI: http://eprints.uberibz.org/id/eprint/1102

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