In the spring of 1925 in Jackson Hole, WY, about 37 million m3 of moisture-laden soil and rock moved down one side of the canyon and surge up the other side. This is an example of a(n)
A) rotational slide.
B) earthflow.
C) slump.
D) rockfall.
Question 2
In the Andes Mountains of South America, entire towns of thousands of people have been buried suddenly when water and loose materials traveled downhill as a viscous fluid. This type of catastrophic event is known as a
A) lahar.
B) slump.
C) rock fall.
D) slide.
E) debris avalanche.