The hydration dated by Joaqu�n Garc�a-B�rcena to 22, 000 years ago.
2.
Obsidian hydration dating was introduced in 1960 by Irving Friedman and Robert Smith of the United States Geological Survey.
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Modern archaeologists have developed a relative dating system, obsidian hydration dating, to calculate the age of obsidian artifacts.
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Obsidian hydration dating was introduced in 1960 by Irving Friedman and Robert Smith of the U . S . Geological Survey.
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Obsidian hydration dating is a geochemical method of determining age in either absolute or relative terms of an artifact made of obsidian.
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Obsidian hydration dating is a type of dating that uses the weathering rind that develops within artifacts or gravel that are composed of obsidian.
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The use of Secondary ion mass spectrometry ( SIMS ) in the measurement of obsidian hydration dating was introduced by two independent research teams in 2002.
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The results of a new dating technique known as quartz hydration dating ( QHD ) demonstrated that the Paris skull had been carved later than a reference quartz specimen artifact, known to have been cut in 1740.
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The water vapor creates a " hydration rind " in the obsidian, and so this approach is known as " hydration dating " or " obsidian dating ", and is useful for determining dates as far back as 200, 000 years.
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