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Xenocrystic Zircons: Messengers from the Deep Crust

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t beneath the interior of the North American Cordillera is invaluable for understanding how plate tectonic processes lead to mountain building these deeper levels of the crust, however are buried tens of kilometers, accessible to study only by geophysical means.

Sample and diagram of layers of continental crust
Diagram and article about exploring deep crust with xenocrystic zircons