EP Gallery: Middle Acheulian -- Olorgesailie, Olduvai Gorge, Near East, Abbevillian (c. 1.0 MYA to 500,000 BP) / m)oldvwkp14
Comment: As at Olorgesailie, the handaxe and cleaver are predominate bifaces at Olduvai Gorge Middle Acheulian sites. Bed IV sites are dated 600-800,000 BP.
Bed IV WK Upper Channel: "The top left and centre bottom specimens are of quartzite, the remainder are of lava."
Photo John Reader © Leakey, M. (1994). Olduvai Gorge, Vol. 5. Cambridge: At the University Press: pl. 14.