Figure 3

Figure 3.

Examples of stone-tool artifacts. Red arrows and lettered faces show correlation between features with different view direction. (A) Lomekwian (3.3 Ma) core from the west of Lake Turkana, Kenya (simplified from Harmand et al., 2015). (B) Oldowan core (1.7 Ma) from Olduvai Gorge, Tanzania (redrawn from Leakey, 1971). (C) Middle to late Pleistocene Acheulian core from Santa Ana Cave, Spain (simplified from García-Vadillo et al., 2022).