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Miocene shallow-water limestones from São Nicolau (Cabo Verde): Caribbean-type benthic fauna and time constraints for volcanism

Bernoulli, Daniel ; Hottinger, Lukas ; Spezzaferri, Silvia ; Stille, Peter

In: Swiss Journal of Geosciences, 2007, vol. 100, no. 2, p. 215-225

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    Titre
    • Miocene shallow-water limestones from São Nicolau (Cabo Verde): Caribbean-type benthic fauna and time constraints for volcanism
    Auteur
    • Bernoulli, Daniel. Geological Institute, University of Basel, Bernoullistrasse 32, 4056, Basel, Switzerland
    • Hottinger, Lukas. Museum of Natural History, Augustinergasse 2, 4051, Basel, Switzerland
    • Spezzaferri, Silvia. Département des Géosciences, Géologie et Paléontologie, Université de Fribourg, Chemin du Musée 6, 1700, Fribourg, Switzerland
    • Stille, Peter. École et Observatoire des Sciences de la Terre (EOST), ULP/CNRS, UMR 7517, Centre de Géochimie de la Surface, Université Louis Pasteur, Rue Blessig 1, 67084, Strasbourg, France
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Swiss Journal of Geosciences, 2007, vol. 100, no. 2, p. 215-225. Birkhäuser-Verlag; www.birkhäuser.ch
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:318792
    Summary
    Shallow-water limestones of presumed Late Cretaceous and Eocene age, interbedded with basaltic lavas, were described by earlier authors from São Nicolau in the northwestern part of the Cabo Verde archipelago. If confirmed, these ages would imply late Mesozoic shallow-marine and subaerial volcanic activity in the Cabo Verde archipelago, and document a geological history very different from that known so far from other Cabo Verde Islands, from which no subaerial volcanic activity before the mid-Cenozoic is known. Our re-investigation of the foraminiferal fauna indicates a Late Miocene age for the presumed Late Cretaceous and Eocene limestones. The hypothesis of a long-lived hot spot, active by the Early Cretaceous, and of a major island-building stage in the Cabo Verde Islands during this period, is therefore not supported by the present bio- or chronostratigraphic data