Figure 6.

Layer G. (1) Recycled bifacial or trifacial tool on a limestone pebble. (2) Bifacial tool on a large chert nodule. (3) Biface on limestone pebble. Two limestone bifaces were also discovered in layer G, including one recycled specimen. As with the bifaces of layer F, they demonstrate a bifacial volume management and equilibrium of the two faces of the tool, as for the tools of layer F. The n°1 shows a triface/biface on a pebble. It is a recycled tool with centripetal smooth removals on one flat face (lower face). The second phase of shaping used the piece as a preform to shape the opposite face by abrupt and more or less invasive removals on both lateral edges and the proximal extremity. There are crushing marks on the round tip, which is slightly shaped. The second biface is also on a pebble (n° 3). Shaping is alternate managing the whole volume by invasive and small removals to create a symmetrical tool. The shape is symmetrical. There is also one bifacial tool on a large chert nodule (n° 2). Using the natural shape of the nodule, the shaping is made by bifacial invasive convergent removals on one side and the proximal part form a tool that is asymmetrical in shape and cross-section, preserving a back on the opposite side. A back is preserved on the opposite side. There is with a notch related to a bec at the tool extremity. Detailed descriptions are given in the Supplementary data. (Photos M-H. Moncel, C. Santagata).