UPPER MAASTRICHTIAN IN NORTHWESTERN PARIS BASIN (FRANCE) - RESIDUAL EVIDENCE IN SEINE-MARITIME

A regional survey on residual clay-with-flints (= ''RS'') in Northwest ern Paris Basin gaves the opportunity to study new outcrops crossing c halky plateaux and interfluves. Flints are sampled in these ''RS'' cov ering chalk and in ''paleo-RS'' reworked at the base of Thanetian depo sits. They supply Upper Maastrichtian microfauna. The deposition of ch alk with flints until the Upper Maastrichtian is thus confirmed in the Western Paris Basin as well as in neighbouring basins. Weathering pro cesses caused their ulterior occultation.