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The Neogene and Lower Pleistocene crags of Upper Normandy: Biostratigraphic revision and paleogeographic implications

Abstract : The biostratigraphic revision of the benthic foraminifera present in the coastal Cenozoic quartzose and shelly sands (crags) at Fécamp and Valmont (Seine-Maritime) reveals Early Pliocene (Fécamp) and Early Pleistocene (Valmont) ages. The Tortonian-Messinian thanatocoenosis contained in the Fécamp Crag shows the presence of a former bryozoanrich platform on the floor of the Channel that was reworked during the Lower Pliocene transgression. Tortonian-Messinian and Lower Pliocene deposits have been found in Belgium, England, Brittany, and at Fécamp, but are absent in Cotentin (North-West Normandy), which was uplifted at this period. The Lower Pleistocene tidal sands and crags described in Cotentin, Upper Normandy and the southern North Sea Basin indicate a marine passage between the Channel and the North Sea.
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https://hal-brgm.archives-ouvertes.fr/hal-00738946
Contributeur : Florence Quesnel <>
Soumis le : vendredi 5 octobre 2012 - 14:10:53
Dernière modification le : lundi 27 avril 2020 - 16:26:29

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Olivier Dugué, C. Bourdillon, F. Quesnel, J.P. Lautridou. The Neogene and Lower Pleistocene crags of Upper Normandy: Biostratigraphic revision and paleogeographic implications. Comptes Rendus Géoscience, Elsevier Masson, 2012, 344 (8), pp.415-422. ⟨10.1016/j.crte.2012.07.001⟩. ⟨hal-00738946⟩

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