Obsidian Source Analysis in Northwestern Wyoming: Problems and Prospects

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Abstract
A brief update is given concerning our research into the distribution of obsidian from the three apparently most important sources in, or adjacent to, northwestern Wyoming. These include Obsidian Cliff in Yellowstone National Park and Teton Pass in southern Jackson Hole. The specific location of the third source, the F.M.Y. or 90 Group, obsidian from which was identified on archaeological sites over i 5 years ago, is still unknown. The distribution data from archaeological sites suggest that the F.M.Y. (90 Group) source itself is not located in Yellowstone National Park as was originally hypothesized; nor is it in Jackson Hole. We currently believe that it may be found somewhere in the arc west to north of Yellowstone National Parle The paper concludes with a request for samples from possible sources so that we might pinpoint the exact F.M.Y. (90 Group) location.

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