Since 1994, the archaeological survey of the Pleistocene alluvial deposits of the north of the River Yonne valley, in the southeast of the Paris Basin, has allowed the discovery of twelve Palaeolithic settlements (Lower to Upper Palaeolithic), the plotting of the evolution of the Yonne terrace system and the proposal of a chronostratigraphical hypothesis. The settlements found in the six last alluvial terraces (Soucy 1 to 6, Etigny Le Brassot PLM, Le Fond des Blanchards and Le Chemin de l'Évangile 3 at Gron, Le Brassot at Étigny) have yielded many lithic industries andfaunal assemblages preserved in fine fluviatile sequences (sands and silts). The first studies and analyses of these settlements have provided much new information about modes...