Glaciers Flow by _____ When the Weight of the Overlying

Multiple Choice

Glaciers flow by _____ when the weight of the overlying ice, firn, and snow causes ice crystals at depth to arrange themselves in parallel layers that glide over each other, much like the spreading of a deck of cards. ​

A) internal plastic deformation
B) ablation
C) basal sliding
D) icefall
E) crevassing