Question

Select the answer that best describes a slump failure surface.

a. Steep and concave
b. Shallow and convex
c. Smooth and planar
d. Irregular and fragmented

Answer 1

A slump failure surface is best described as shallow and convex, which indicates a mass wasting event where the material moves along a curved surface.

Step-by-step explanation:

The answer that best describes a slump failure surface is b. Shallow and convex. A slump is a type of mass wasting that involves the downward sliding of a mass of rock or soil along a curved surface. The failure surface, therefore, tends to be shallow and have a convex shape. In contrast to a slump, a steep and concave failure surface might describe a rotational landslide, smooth and planar could describe a translational slide, and irregular and fragmented would be more characteristic of a rockfall or debris flow.