BERNHARD EDMAIER / SCIENCE PHOTO LIBRARY BERNHARD EDMAIER / SCIENCE PHOTO LIBRARY
Eroded rock. Aerial photograph of rock columns (white/brown) produced by erosion. The rock is composed of iron and manganese materials which settled here around 40 million years ago, during the Tertiary period. The materials settled at the edge of a lake and gradually solidified into stone. Since then the lake has disappeared and rain, wind and ice have acted on the rocks. The softer parts of the rock gradually disintegrated, leaving the tall columns and towers of hard rock seen. Photographed in the Bryce Canyon National Park, Utah, USA.
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