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Show Notes
Obsidian Cliff in Yellowstone Park is the largest deposit
of obsidian in North America. Native Americans have used this for thousands of
years for scrapers, spears and arrow heads. More than two dozen tribes would
peacefully gather obsidian in this war free zone. Pieces of this obsidian has
been found as far as the East coast and central America. Knapping, the process
of making arrow heads is still used today.
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