This icefall has been vastly reduced in size as the glacier has diminished. If you look carefully at the ice in some of the crevasses, it is clearly banded or layered -- these are annual accumulation layers, but they are nowadays not very thick, and the dark bands are the summer melting surfaces, very dirty indeed. This means that in warm weather every summer there is a lot of windblown material about, which reduces albedo, darkens the snow surface and thence increases the rate of melting. Another sign of a glacier in serious decay -- in spite of all the spectacular crevasse features captured in this drone footage......
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