Le Paléolithique moyen à outils bifaciaux dans l'ouest de la France

The Middle Palaeolithic with bifacial tools in western France: information synthesis of old and new facts : The industries of bifacial tools from the Armorican Massif, like "the great sites of glossy sandstone exploitation " from the Bois-du-Rocher (Saint-Hélen, Côtes d'Armor) and Kervouster (Guengat, Finistère), known since the XIXe century are the subject of recent new studies. These studies propose to put particularly the accent on a morphological and functional approach of bifacial tools and their supports, similarly that on chronostratigraphic and palaeoenvironmental data linked to the type of industry