A large variety of well

A large variety of well-preserved ornaments were crafted from marine gastropod shells (Fig. 15: 7–13), bird bones (Fig. 15: 5, 6), tortoise shells (Fig. 15: 2–3), and ostrich eggshell (Fig. 15: 1) (from 2010: n = 23; and excavations: n = 44). It is expected that BU 224 microscopic analysis will provide diagnostic information regarding modifications to the original form. No debris linked with an in situ preparation has been observed. Neither ostrich nor elephant are commonly found in the region archaeologically, and marine shells would have had to be brought from a distance of 70 km, whether in their natural state or as decorated objects. This is highly suggestive of long distance trade and exchange and, as such, will be investigated further. With respect to ostrich eggshell beads ( Fig. 15 n° 1) from F37 excavations, ventilation are elements showing diagnostic achieved aspects from a calibration with a typical grooved stone (pierre à rainure) According to the final diameter of the beads, different stone-tools such as “pierre à rainure” with different gorge diameters were used, but after a systematic peripheral segmentation, either inside the cave, or brought there as is (that is to say unfinished) through exchanges.