The rock debris which accumulates at the base of steep slopes by gravitational action is called ________.
A) exfoliation
B) talus
C) slump
D) creep
E) vesicles
Question 2
With the passage of time, all talus migrates ________.
A) downslope
B) upslope
C) out of the ravine
D) very quickly
E) only when there are earthquakes