At El Beyed, Mauritania, although no palaeontological documents are available, a very important Acheulean deposit, characterised mainly by bifaces and choppers, outcrops on the present ground. The position of the geological layers in which the industries are found gives a first chronological approach. But, of course, it is not known to which human type they belong. No serious excavations have yet been carried out in this region, which is becoming increasingly rich.
