BERNHARD EDMAIER / SCIENCE PHOTO LIBRARY BERNHARD EDMAIER / SCIENCE PHOTO LIBRARY
Glacial moraines. Aerial view of zigzag folding of a moraine on a glacier. A moraine is rubbly material that has been transported and deposited by a glacial surge (a down-glacier movement of ice). Most glaciers are currently receding, but several, notably those in Alaska, USA, show regular surges which leave behind moraine patterns such as those seen here. Photographed on Malaspina Glacier, Alaska, USA.
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