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Obsidian hydration dating of volcanic events

January 1, 1981

Obsidian hydration dating of volcanic events had been compared with ages of the same events determined by the 14C and KAr methods at several localities. The localities, ranging in age from 1200 to over 1 million yr, include Newberry Craters, Oregon; Coso Hot Springs, California; Salton Sea, California; Yellowstone National Park, Wyoming; and Mineral Range, Utah. In most cases the agreement is quite good. A number of factors including volcanic glass composition and exposuretemperature history must be known in order to relate hydration thickness to age. The effect of composition can be determined from chemical analysis or the refractive index of the glass. Exposure-temperature history requires a number of considerations enumerated in this paper. ?? 1981.

Publication Year 1981
Title Obsidian hydration dating of volcanic events
Authors I. Friedman, J. Obradovich
Publication Type Article
Publication Subtype Journal Article
Series Title Quaternary Research
Index ID 70012031
Record Source USGS Publications Warehouse