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  • Exhibition Text

    • Sedimentary rocks form a thin veneer over much of the crust. This one formed from mud deposited on a stream bank during a flood 260 million years ago.

      AMNH collection

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  • For Educators

    • Topic: Earth Science

      Subtopic: Earth Structure

      Keywords: Continental crust, Geology, Earth (Planet)--History, Shale

      Audience: General

American Museum of Natural History

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