SIMON FRASER / SCIENCE PHOTO LIBRARY SIMON FRASER / SCIENCE PHOTO LIBRARY
Glacier. Head (snout) of a glacier showing the layered ice formed over thousands of years by snowfall on top of the glacier. The black layers (bottom frame) contain moraine material. This is rock debris that has been swept up and frozen into the glacier as it moves downhill under its own weight. Photographed in Payer Land, North East Greenland National Park, Greenland.
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