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formerly filled with ice to a depth sufficient to bury the Isle of Man, or 2,000 ft. But I doubt whether the conclusion of Professor Phillips follows from the facts. At the foot of a glacier the ice is of course less than that depth, so that it would not there crush at its base; and higher up the glacier, where the depth is sufficient to crush the base, the crushed ice could not escape since it would be confined by the uncrushed ice in front. It would, therefore, act like a fluid, and woulddoi:10.1144/pygs.6.159 fatcat:3eih35hdn5az3kn2czd55eefze