Q78
Geography (incl. West Bengal)Physiography: Mountains, Plateaus, Plains & Islands
The Chotonagpur plateau is primarily composed of
- a.sandstone, limestone and shale
- b.granite, limestone and dolomite
- c.Archaean rocks of granite and gneiss etc.
- d.gondwana coal, sandstone and limestone
Answer: (C) Archaean rocks of granite and gneiss etc.
The Chotanagpur plateau is a part of the Peninsular shield made mainly of Archaean granite and gneiss, with Gondwana coal-bearing rocks in the Damodar valley and lava-capped 'pat' lands in the west. It is called the 'Ruhr of India' for its mineral wealth, and its highest point is Parasnath. Option (D) describes only the Gondwana basins, and sandstone-limestone-shale is typical of the Vindhyan system.