BILL BACHMAN / SCIENCE PHOTO LIBRARY BILL BACHMAN / SCIENCE PHOTO LIBRARY
Rock strata. Kurrajong tree in front of folded rock strata. These bands of rock have been twisted by movements in the Earth's crust. These are thought to be some of the oldest rocks on Earth, dating back almost three billion years. Photographed at Hamersley Gorge in the Hamersley Range National Park, Western Australia.
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