Flakes: - A small chip of stone knocked from a larger stone core., occipital torus - A horizontal ridge at the back of the skull in Homo ergaster, Homo erectus, and archaic Homo sapiens, cores - A piece of stone from which smaller flakes are removed., Knapping - The process of manufacturing stone tools., Oldowan tool industry: - A set of simple stone tools made by removing flakes from cores without any systematic shaping of the core. This industry is found in Africa at sites that date from about 2.6, Mode 1 - A category of simple stone tools made by removing flakes from cores without any systematic shaping of the core. Tools in the Oldowan industry are Mode 1 tools., hand ax - The most common type of biface stone tool found in Acheulean sites. It is flat and teardrop shaped with a sharp point at the narrow end., Biface: - A flat stone tool made by working both sides of a coreÊuntil there is an edge along the entire circumference; hand ax., Cortex: - The original, unmodified surface of a stone used to make stone tools, Cleaver: - A biface stone tool with a broad, flat edge. Cleavers are common at Acheulean sites.,

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