L'Eemien et le Pléistocène moyen récent fluvio-marin et continental de la vallée de la Seine de Cléon au Havre (Normandie) [marine and continental Eemian and Middle Pleistocene of the Seine of Cléon to the Havre.

Abstract

New data and especially paleontological analysis allows the correlations between the formations of Rouen (upstream) and Le Havre (downstream) in the Seine Valley The key formation is represented by a palaeoestuary of MIS 7 with an altitude that can reach 15 m O D Another formation, the "sables lites", alluvial (Tourville) or fluvio-marine (Tancarville), has been deposited just after, at the beginning of MIS 6. The Eemian is characterised by a dune (MIS 5e optimum) at Tancarville (4-14 m O D ) and by a regressive palaeobeach (Le Havre) of the late MIS 5e, which altitude is lower than 0 m O D. The beginning of the MIS 6 ("sables lites" formation) is in relation with a marine level identical to the level of the palaeostuary (MIS 7) below. So there was no marine regression during the early MIS 6 unlike the Early Weichselian (MIS substages 5 a-d).