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Published online by Cambridge University Press: 20 January 2017
The original guess dates for Jarmo were about 6000 B.C. (and thus close to the recent Washington and Heidelberg radiocarbon dates of 6750 B.C.) rather than about 4750 B.C. (the date derived from Libby's original radiocarbon determinations) as suggested in the papers on obsidian dating in American Antiquity, Volume 25, Number 1.