Une nouvelle occurrence de l’Acheuléen pyrénéo-garonnais et la question de la régionalisation des productions lithiques à la fin du Pléistocène moyen : le site du Cassé à Cornebarrieu (Haute-Garonne)

An excavation at Le Cassé (Cornebarrieu, Haute-Garonne) has provided new data on Late Middle Pleistocene technical production on the northern slopes of the Pyrenees. Despite the fact that the site was developed in several phases, as revealed by the analysis of the surface conditions, the archaeological remains show a certain technological homogeneity. Raw materials were obtained from alluvial deposits on the lower and middle terraces of the Garonne. Some materials, such as quartz and quartzite from the Massif Central or the Montagne Noire, and silica from Verdier, testify to the wider area covered by the site. The petrographic composition is 97% quartzite and quartzite and 3% silica. A partial economy of raw materials is expressed by the use of silicites for Levallois reduction, which is rare, and for light tools on flakes, whereas 96% of heavy-duty tools are made of quartzite. The reduction processes are often non-standard, associated with alternating surface production and Discoid, often unifacial. Heavy duty tools, often on large flake blanks, include unifaces, bifaces and cleavers. Taken together, this data, placed in the context of the techno-complexes of the northern Pyrenees, suggests that the Cassé series belongs to the Acheulean “pyrénéo-garonnais”. In the broader context of the end of the Middle Pleistocene in southern Europe, the Cassé data supports the previously proposed hypothesis of a techno-cultural unit common to the north and south of the Pyrenees.