"The central parts of a glacier travel more rapidly than the sides--and the top portion moves more rapidly than the bottom. (The rate of movement of the alpine glacier Mer de Glace is from 20-27 inches a day at the center, and from 13-19 1/2 inches at the sides.)"
Illustration: "Showing how the center of a glacier moves more quickly than the sides. After a time, a row of stakes originally driven in a straight line would become curved, for the center stakes would move faster than the outside ones."
Issue: The Flash #196 (April 1970)
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