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Inclusions of conifers, echinoids, foraminifers and sponges in flints from the Cenomanian of Charente-Maritime (France): Contribution of synchrotron microtomograph

Abstract : Deposits containing silica-rich nodules were recently collected from the Font-de-Benon quarry, between Archingeay and Les Nouillers, Charente-Maritime, western France. Nod- ules contain diverse fossil inclusions such as conifers, urchins, foraminifers and sponge spicules. Cenomanian deposits were transformed during the Eocene-Oligocene by a delayed silicification. This occurred under a warm climate and a long pedogenic alteration. X-ray synchrotron tomography was used to locate and produce three-dimensional reconstruction of flint fossil inclusions. The plant fossils constitute an unusual case of late permineraliza- tion. The conifer and invertebrate fossil assemblage suggests a coastal palaeoenvironment close to a forest
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https://hal-insu.archives-ouvertes.fr/insu-01016320
Contributor : Isabelle Dubigeon <>
Submitted on : Monday, June 30, 2014 - 8:27:43 AM
Last modification on : Thursday, April 23, 2020 - 8:56:02 PM

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Jean-David Moreau, Didier Néraudeau, Bernard Gomez, Paul Tafforeau, Eric Dépré. Inclusions of conifers, echinoids, foraminifers and sponges in flints from the Cenomanian of Charente-Maritime (France): Contribution of synchrotron microtomograph. Comptes Rendus Palevol, Elsevier Masson, 2014, 13 (5), pp.455-461. ⟨10.1016/j.crpv.2014.03.007⟩. ⟨insu-01016320⟩

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