Between 1962 until 1971, F. Bordes carried out excavations at Cobiac, on an incredible rich site, with 4 layers of a late Gravettian and one layer of a MTA. Corbiac is an open air site on a ridge near a wide valley (the Dordogne valley). It seems that Corbiac was a summer site, visited by a group of foragers for several years.
The upper Gravettian layer (layer 1) has given 17000 retouched stone tools. The Gravettian was characterized by an evolved blade technique, by many burins (mainly diedres) and backed instruments (backed bladelets, Gravette points, and micro Gravette points). There are some Points a face plane, some chamfered pieces and so called Corbiac- burins.
Functional studies on Gravettes from the Early Gravettian site of Sire (Mirefleurs, Puy de Dôme, France, 30 k.a BP) show that microgravettes could be interpreted as arrowheads shot from a bow. Larger Gravettes were used as projectile points, but also as knives with a continuum from more knife-like to more point-like pieces. At Corbiac the use of Gravettes as projectiles was confirmed by O’Farrell (2004).
Suggested Reading: http://www.persee.fr/web/revues/home/prescript/search/?p_p_action=1&