Ripple marks in sandstone

  • Exhibition Text

    • The upper surface of this rock shows a wavy pattern known as ripple marks. These structures are formed by the movement of water (or wind) over sediment, and are useful for determining the direction of the current.

      AMNH collection

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  • For Educators

    • Topic: Earth Science

      Subtopic: Earth Formation/Evolution

      Keywords: Erosion, Geology, Rocks

      Audience: General