Resultats de dragages et essai de stratigraphie des bancs de Galice,et des montagnes de Porto et de Vigo (marge occidentale Iberique) |
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Authors: | PA Dupeuble JP Rehault JL Auxietre JP Dunand L Pastouret |
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Institution: | 1. Laboratoire de Géologie, Faculté des Sciences et Techniques, 76130 Mont-Saint-Aignan France;2. Université Pierre et Marie Curie et Station de Géodynamique sous-marine, 06230 Villefranche-sur-Mer France;3. Centre Océanologique de Bretagne, BP 337-29273 Brest France |
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Abstract: | Dredged samples have been studied to establish the stratigraphy as well as the probable paleogeographic evolution of the sedimentary cover of Galicia Bank, and Vigo and Porto Seamounts. The sedimentation appears to have been neritic up to the Late Jurassic. These structural features evolved separately from the Iberic continental margin in Late Jurassic to Early Cretaceous times. Part of the sediments is made of calpionellid limestones, which is indicative of open marine conditions in this area of the Atlantic at that time. This also suggests the establishment of marine connections between this area and the “Mésogée”. These open marine conditions would have persisted since the Early Cretaceous. |
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