What type of slope failure is shown in this figure?
A)rotational slide
B)creep
C)rock avalanche
D)debris flow
E)rock fall

Question

What type of slope failure is shown in this figure? 
A)rotational slide 
B)creep 
C)rock avalanche 
D)debris flow 
E)rock fall

Quizplus · Accepted Answer

The figure shows a clear rotational failure with a well-defined tension crack. The mass of soil has rotated around a pivot point and is visible in the curved scar on the slope. Creep is a slow, gradual movement, which typically lacks the sudden displacement associated with this failure. Rock avalanches are characterized by the rapid descent of large boulders and do not involve soil materials. Debris flows are also rapid and involve a mix of water and sediment, which is not evident in the figure. Rock fall involves the detachment and free fall of individual (or small groups of) rocks, but does not involve the downslope movement of a cohesive mass.

What Type of Slope Failure Is Shown in This Figure