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

Question

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

Quizplus · Accepted Answer

Internal plastic deformation is the process by which glaciers flow due to the rearrangement of ice crystals under pressure, allowing the ice to deform and move without cracking.

Glaciers Flow by _____ When the Weight of the Overlying