Cenozoic shelly sands in the Cotentin (Armorican Massif, Normandy, France): A record of Atlantic transgressions and intraplate Cenozoic deformations
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- 作者：Olivier Dugué ; Jean-Paul Auffret ; Nicole Poupinet
- 关键词：Armorican Massif ; Cenozoic ; Shelly sands (faluns) ; Palaeozoic rocky shoals ; Transgressions ; Deformations ; France
Mots clé ; s ; Massif armoricain ; Cé ; nozoï ; que ; Faluns ; É ; cueils palé ; ozoï ; ques ; Transgressions ; D&#x - 刊名：Comptes Rendus Geoscience
- 出版年：2007
- 出版时间：February 2007
- 年：2007
- 卷：339
- 期：2
- 页码：110-120
- 全文大小：1301 K
文摘
Three episodes of Cenozoic tidal shelly sands (‘faluns’), dated to the Middle Eocene, Middle Miocene, and Plio-Pleistocene, were deposited by transgressions over the Northeast of the Armorican Massif (Cotentin, Normandy, France) during highstand eustatic sea levels. These shelly calcareous sands and gravels were deposited behind Palaeozoic rocky shoals that separate the Cotentin Basin from the Atlantic Ocean. The morphology of the Cotentin Basin persisted through the Palaeogene and Neogene times with smooth slopes, despite the Cenozoic eustatic sea-level fluctuations and uplifts that affected the Armorican Massif and its borders.