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Press Release 05-099
Trace Gold Reveals Tree's Past

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A sample has been removed from this tree slice to examine it for traces of gold.

A sample has been removed from this tree slice to examine it for traces of gold.

Credit: Greg Grieco, Pennsylvania State University


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Ring samples are analyzed by neutron activation.

Ring samples are analyzed by neutron activation.

Credit: Greg Grieco, Pennsylvania State University


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Vials filled with samples are ready for analysis.

Vials filled with samples are ready for analysis.

Credit: Greg Grieco, Pennsylvania State University


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National Science Foundation Social, Behavioral & Economic Sciences (SBE)
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Last Updated:
Oct 27, 2008
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Last Updated: Oct 27, 2008