The bottom or downward tip of a crevasse marks the ______.
A)boundary between the basal sliding and external flowage zones
B)bottom of the basal sliding zone
C)boundary between parts of the glacier moving by basal sliding and crevassal slip
D)top of the internal deformation and flowage zone

Question

Quizplus · Accepted Answer

The bottom or downward tip of a crevasse marks the top of the internal deformation and flowage zone, where the glacier ice transitions from brittle to plastic flow.

The Bottom or Downward Tip of a Crevasse Marks the ______