Stone Tool Making Techniques: Indirect percussion thinning and shaping

A biface is a core with flakes struck to opposite faces along the same platform edge.  Sophisticated strategies emerged early in prehistory to create bifacially-flaked tools because the bifacial platform edge is sharp, robust, and suitable for a variety of tasks.  This was sometimes accomplished using punches and an indirect percussion technique.

Etley point, Missouri

Etley Point