DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Mixed geology of Rockham Beach. These cliffs are composed of Upper Devonian shale. This is a sedimentary rock formed from layers of clay or mud. Marble intrusions are seen in the foreground. Marble is a metamorphic rock and is the product of metamorphosed limestone. Photographed at Rockham Beach, north Devon, UK.
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