Making an obsidian biface using a soft hammerstone. Demonstration by Dr J Jeffrey Flenniken.
In this video, Dr J. Jeffrey Flenniken uses a soft limestone hammerstone to percussion flake a piece of obsidian into a biface. The film was made of a demonstration filmed at the University of New England, Australia, in 1982. You can view a 3D model of the biface at https://stonetoolsmuseum.com/artefact...
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