Bifacially worked chipped stone projectile points of the Plano Tradition with a broad pointed top set on a straight-sided trapezoidal body. The base is narrow and straight. Used by later Palaeo-Indian cultures of the North America Plains in the period around 7500 BC. Experiments show that these points were probably spearheads and fully capable of penetrating the hide and rib cage of large beasts such as bison.
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