Cool early Albian climates: new data from Argentina

D Pirrie*, JD Marshall, P Doyle, AC Riccardi

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Previous studies on the stable isotope geochemistry of dimitobelid belemnites from Antarctica and Australia indicated cool climatic conditions during the early Albian in the shelf seas around the Gondwanan margin. In this paper new analyses from diagenetically unaltered specimens of Dimitobelus cf. stimulus from early Albian deposits of the Rio Mayer Formation of Lago San Martin, southern Argentina are presented. Oxygen isotope values for diagenetically least altered samples give values ranging between delta(18)O +0.07 and +0.96 vPDB, which equate to a mean palaeotemperature of 9.5 degreesC (assuming delta(w) of -1.2parts per thousand SMOW). These data are consistent with a model of cool early Albian shelf seas in the Southern Hemisphere. (C) 2004 Elsevier Ltd. All rights reserved.

    Original languageEnglish
    Pages (from-to)27-33
    Number of pages7
    JournalCretaceous Research
    Volume25
    Issue number1
    DOIs
    Publication statusPublished - Feb 2004

    Keywords

    • Albian
    • palaeoclimates
    • Argentina
    • dimitobelid belemnites
    • JAMES-ROSS-ISLAND
    • OXYGEN ISOTOPIC COMPOSITION
    • MESOZOIC BELEMNOIDEA
    • HIGH-LATITUDES
    • ANTARCTICA
    • AUSTRALIA
    • GREENHOUSE
    • BELEMNITES
    • RECORDS
    • PALEOTEMPERATURES

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