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Abstract An approximate calculation is made of the rate at which a bottom crevasse in a cold ice shelf or tabular iceberg can close shut by freezing of water and can creep open through the creep deformation of ice. In all but the thickest ice shelves and icebergs, those with a thickness greater than about 400 m, the freezing process is the more important mechanism if the ice is cold ( – 10°C). Consequently in a cold iceberg or ice shelf a bottom crevasse, once formed, will freeze shut.
J. Weertman (Tue,) studied this question.
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