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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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