How Does a Crevasse Form

question 31

Multiple Choice

How does a crevasse form?

• A)A glacier moves over a volcanic hot spot,causing differential melting and caving it inward.
• B)A glacier moves across a ridge of particularly resistant rock,which breaks the glacier from the bottom upward.
• C)Internal stress causes a glacier's upper surface to break as the glacier moves.
• D)A glacier moves over a pre-existing stream valley,which causes it to fracture on each side of the valley.

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