Tag Archives: archaeology

Yellowstone’s Obsidian Cliff: Humanity’s Tool Shed for 11,500 Years

New York Times: “Obsidian is among the most prized tool stones in the world, and this particular deposit, nearly 100 feet thick, is exceptional because of its continuous use by Indigenous people since the last ice age. Over the last 11,500 years or so, the stone has been fashioned into deadly knives, razor-sharp spear points, darts for atlatls, or spear-throwers, and arrowheads.” Continue reading

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