This is a fabulous image of a land-terminating glacier edge in NE Greenland -- Wordie Gletscher -- which has relatively clean ice and a narrow belt of small moraines just beyond its edge. (Another part of the same glacier does terminate in the sea.) That means that the ice is now retreating from a stillstand position. Why does this glacier seem to transport so little debris? The simple answer may be that it is frozen onto its bed -- and so should be called a cold-based or "polar" glacier. But I suspect that the answer is a bit more complex than that......
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