EROSION

EROSION
Erosion refers to the disintegration of rocks which lie exposed to what are called the agents of erosion, Le., gravity, running water, wind, and moving ice, and, on the coasts, waves, tides and currents.
Landforms Made By Rain Action Rain action is an aspect of erosion as it involves movement. It is most marked in semi-arid regions because these have little or no vegetation and the rains, though infrequent, are torren­tial. It produces the following features.

A gully is an incised water-worn channel. Overland flow down a slope, following heavy rainfall, is concentrated into rills, which merge and enlarge into the gully.
When rain falls on slopes made of clay and boulders, the clay is rapidly removed except where the boulders form a protection. When this happens, columns of clay capped by boulders develop. These an~ called earth pillars.