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How does obsidian hydration dating work

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Porn Base How does obsidian hydration dating work.

The obsidian hydration dating method was introduced to the archaeological community in by Irving Friedman and Robert Smith of the U.

Geological Survey Friedman and Smith The potential of the method in archaeological chronologic studies was quickly recognized and research concerning the effect of different variables on the rate of hydration has continued to the present day by Friedman and others. When a new surface of obsidian is exposed to the atmosphere, such as during the manufacture of glass tools, water begins to slowly diffuse from the surface into the interior of the specimen.

When this hydrated layer or rind reaches a thickness of about 0. How does obsidian hydration dating work rims formed on artifacts can vary in width from less than one micron for items from the early historic period to nearly 30 microns for early sites in Africa Michels et al.


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