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  • Exhibition Text

    • Weathering and erosion of rocks like granites concentrate elements that are necessary to form clay minerals, which accumulate as sediments.  The deposition and burial of clays, in the delta of a river, for example, lead to the formation of the sedimentary rocks claystone and shale.

      AMNH Collection

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  • For Educators

    • Topic: Earth Science

      Subtopic: Minerals and Resources

      Keywords: Geochemical cycles, Tonsteins, Geology, Shale, Sedimentary rocks, Soils

      Audience: General

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