Multiple Choice
Niagara Falls migrates upstream about 1 meter per year because it:
A) erodes a soft shale on top of a resistant dolostone.
B) erodes a hard sandstone on top of a soft shale.
C) erodes a hard sandstone on top of a soft limestone.
D) erodes a soft shale beneath a resistant dolostone.
Correct Answer:
Verified
Correct Answer:
Verified
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