• 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

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  • For Educators

    • Topic: Earth Science

      Subtopic: Minerals and Resources

      Keywords: Gneiss, Geochemical cycles, Geology, Magmas, Shale

      Audience: General