EUGENE M. MCCARTHY, PHD GENETICS
The Acheulean biface shown below, dating to approximately 350,000 B.P., is from a site at Atapuerca, a small town in the province of Burgos in northern Spain. Bifaces are two-sided stone tools produced by chipping away flakes ("lithic reduction"). So they are have flake scars on both sides. These hand axes were used for a variety of purposes. They are usually convex in shape. This particular ax is shaped from quartzite.
Below is another Acheulean hand ax, from the site for which the Acheulean is named, Saint-Acheul, a hamlet in northwestern France. Dating to about 400,000 B.P., this tool was chipped out of flint.
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