The slopes of these features have angles of repose of 20° to 30°.
A) sinkholes
B) stalagmites
C) cavern walls
D) pillars
E) geyser basins

Question

Quizplus · Accepted Answer

The angle of repose refers to the steepest angle at which a sloping surface formed of a particular loose material is stable. Sinkholes can have slopes with angles of repose between 20° to 30°, as they are often formed by the collapse of surface material into a void below.

The Slopes of These Features Have Angles of Repose of 20°