Lithosphere: Exogenic Processes

Introduction

Let’s recall that you have learned in the previous chapter about geomorphic processes - Endogenic processes in detail. Now we deal with the exogenic processes. The forces which act on the earth’s exterior are called as exogenic forces or external forces. The action of exogenic forces results in wearing down the rock and hence, they are considered as land wearing forces.

Exogenic Processes

The processes which occur on earth’s surface due to the influence of external forces are called as exogenic processes. Weathering, mass wasting and denudation are the major exogenic processes. The elements of nature capable of doing these exogenic processes are termed as gradational agents. For instance, the wind, river, glacier, waves and ground water.

At Mahabalipuram, Chennai, the 6 meter high and 5-metre wide rock estimated to weigh over 250 tons is known locally as Krishna's Butter Ball. Its original Tamil name is "Vaanirai Kal" which literally translates to "Stone of The Sky God”

Look at the figure above Krishna's Butter ball inserted on the top and let's discuss:

What, do you think, made this rock stone to get this shape?

Guess how many years it might have taken to get such a shape.

Think about how it is standing balanced?