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Diabase

Diabase

Diabase

  • Exhibition Text

    • This rock solidified from a basaltic magma within a few hundred meters of the surface, probably beneath a volcano.  It cooled rapidly, giving it a fine-grained, peppery appearance.  The black mineral is pyroxene, and the white one is plagioclase.

      Donated by TILICON, Haverstraw, New York

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American Museum of Natural History

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