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Science 23 February 1968:
Vol. 159. no. 3817, pp. 878 - 880
DOI: 10.1126/science.159.3817.878
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Articles

Hydration Rind Dates Rhyolite Flows

Irving Friedman 1

1 U. S. Geological Survey, Denver, Colorado 80225

Hydration of obsidian has been used to date rhyolite flows, containing obsidian or porphyritic glass, at Glass Mountain (Medicine Lake Highlands) and Mono Lake, California. The method is simple and rapid and can be used to date flows that erupted between 200 and approximately 200,000 years ago.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Hydration Rate of Obsidian.
I. Friedman, I. Friedman, and W. Long (1976)
Science 191, 347-352
   Abstract »    PDF »
Obsidian Hydration Dates Glacial Loading?.
I. Friedman, I. Friedman, K. L. Pierce, J. D. Obradovich, and W. D. Long (1973)
Science 180, 733-734
   Abstract »    PDF »
Obsidian Hydration Dating Applied to Dating of Basaltic Volcanic Activity.
I. Friedman, I. Friedman, and N. Peterson (1971)
Science 172, 1028
   Abstract »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)