Preform of a bifacial piece with planoconvex cross section made on sandstone.
This piece comes from the site of Toumboura III (TMB III) in the Falémé valley (Senegal), Stratigraphic Unit UJ, Square A1, Number 22.
It has been discovered during the 2017 excavation campaign.
You can observe the 3D model of this piece in full screen mode opening this link: https://visual.ariadne-infrastructure.eu/3d/tmbiii_u3_a1_22-0?standalone
You can find more details about this archaeological arefact in the following paper published in African Archaeological Review : https://link.springer.com/article/10.1007%2Fs10437-021-09463-5
Licence: Creative Commons Attribution Non Commercial No Derivatives 4.0 International (CC-BY-NC-ND-4.0)