Obsidian Hydration Rate for the Klamath Basin of California and Oregon

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Science  26 Sep 1969:
Vol. 165, Issue 3900, pp. 1354-1356
DOI: 10.1126/science.165.3900.1354


A hydration rate for obsidian of 3.54 microns squared per 1000 radio-carbon years has been established at the Nightfire Island archeological site in northern California and provides a means to date other prehistoric Klamath Basin sites. The new rate follows the form of the hydration equation formulated by Friedman and helps to refute claims made for other hydration equations.

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