Solution:The Chhotanagpur plateau is called the deposit of Indian mineral substances, due to the richness of minerals, it is also called the Rur region of India. Chotanagpur plateau represents the north-eastern projection of the Indian Peninsula.Mostly in Jharkhand, northern part of Chhatisgarh and Purulia district of West Bengal. The Son river flows in the north-west of the plateau and joins the Ganga. The average elevation of the plateau is 700 m above sea level.
This plateau is composed mainly of Gondwana rocks. The plateau is drained by numerous rivers and streams in different directions and presents a radial drainage pattern. Rivers like the Damodar, the Subarnrekaha, the North Koel, the South Koel and the Barkar have developed extensive drainage basins.
The Damodar river flows through the middle of this region in a rift valley from west to east. Here are found the Gondwana coal fields which provide bulk of coal in India. North of the Damodar river is the Hazaribagh plateau with an average elevation of 600 m above mean sea level.
This plateau has isolated hills. It looks like a peneplain due to large scale erosion. The Ranchi Plateau to the south of the Damodar Valley rises to about 600 m above mean sea level. Most of the surface is rolling where the city of Ranchi (661 m) is located.
At places it is interruped by monadnocks (an isolated hill or ridge of erosion-resistant rock rising above a peneplain. Ex: Ayers Rock in Australia) and conical hills. The Rajmahal Hills forming the north eastern edge of the Chotanagpur Plateau are mostly made of basalt and are covered by lava flows {Basaltic Lava).
They run in north-south direction and rise to average elevation of 400 m (highest mount is 567 m). These hills have been dissected into separate plateaus.
