How is Pediplain Formed?

By Devyani Singh|Updated : October 4th, 2022

Pediplain is formed by the joining of multiple pediments. Pediments can be called erosional surfaces. It is described as a rock surface that is flat and wide. They develop due to erosion caused by flowing water sheets or flooding of sheets over them. It may be covered in a thin layer of river gravel which may be caused by the retreat of rock from the foot of the mountains.

Formation of Pediplain

A pediplane is a collection of pediments formed by erosion. Behind the construction of the pediplane and pediment is erosion caused by water and wind. Persistent wind and water erode rock surfaces and disintegrate them into smaller pieces.

These small fragments that were once mountain ranges form pediments towards the foot of the mountains. These pediments tend to slope downwards where they interact with each other to form a broad and flaky rock surface known as a pediplain.

Pediplanes are most commonly formed around arid and semi-arid regions with short periods of heavy rainfall. It is formed by the processes of lateral erosion and mechanical weathering.

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FAQs on Pediplain Formation

  • Lateral erosion and mechanical weathering are responsible for Pediplain formation. It is a rock surface that is wide and flat.

  • The concept of pediplain was first developed by geologist Lester Charles King in his 1942 book South African Scenery. 

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