Evidence (2) Afrique de l'Ouest (1) puits (1) vallée (1) spectacle (1) recherche (1) archéologie (1) continent (1) Afrique (1) The Valley (1) Ouest (1) Est (1) Sénégal (1) Dynamics (1) Parts (1) Parts (1) Antiquities, Prehistoric (1) Work (1) Water (1) Volume (Cubic content) (1) Stone age (1) Sediments (Geology) (1) Research (1) Raw materials (1) Quartz (1) Mesolithic period (1) Prehistoric peoples (1) Luminescence (1) Industries (1) Graywacke (1)