Abstract Study of the sedimentology of the palaeolithic rock shelters of Combe‐Grenal, Caminade, Pech‐de‐1'Aze, and Le Moustier has enabled the author to define the relative position of the Mousterian industries at these sites within the climatic chronology of the early Wurm. Correlations established by sedimentology show the inter‐stratification and contemporaneity of the three cultural entities known as Ferrassie Mousterian, Quina Mousterian and Mousterian of Acheulian Tradition.