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An Obsidian Hydration Rate for the Lower Columbia River Valley

Published online by Cambridge University Press:  20 January 2017

Rick Minor
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Abstract

A hydration rate for obsidian of 1.3 μm2 per 1,000 radiocarbon years has been calculated for the lower Columbia River Valley of Oregon and Washington. The rate provides a means for dating prehistoric archaeological sites containing obsidian in terms of their radiocarbon age.

Type
Reports
Information
American Antiquity , Volume 42 , Issue 4 , October 1977 , pp. 616 - 619
Copyright
Copyright © Society for American Archaeology 1977

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