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Gneiss

Part of David S. and Ruth L. Gottesman Hall of Planet Earth.

Gneiss AMNH/R.Mickens

Exhibition Text

With burial and the associated increase in pressure and heating, shales may be transformed by re-crystallization in the deep crust into metamorphic rock, like this gneiss.  Even greater heating of shales may lead to melting and generation of new granite magma.

AMNH Collection

For Educators

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