Old Crow Basin from north american a....

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Old Crow Basin

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tool made from caribou tibia- date on bone apatite at 27,000 many broken mammoth bone "tools" found in riverbed- dates ranging 27,000-50,000+ can be accounted for by natural causes none come from primary arch. context all have been washed into river basin re-date tibia tool using collagen fraction, 1350 +/- 150 bp context is very important > need to be with other artifacts

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