matching obsidian to specific volcanoes - how clever

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Dr Ellery Frahm from theĀ  University of Sheffield has continued with research from the mid sixties of chemically matching obsidian from early tools to specific volcanoes. Later work now developed using magnetic analysis is able to pin point the source of obsidian to within metres of it's origin. This development enables researchers to understand early human movement and exact quarry locations.

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