it is located in eastern India, in Jharkhand state. it is composed of Precambrian rocks . Chota Nagpur is the collective name for the Ranchi, Hazaribagh, and Kodarma plateaus, which have an area of 25,293 sq m. Its largest division is the Ranchi Plateau, which has . The Chota Nagpur plateau in its entirety lies between the basins of the Ganges and Son rivers to the north and the Mahanadi River to the south; through its centre, from west to east, runs the coal-bearing, faulted Damodar Valley. Numerous streams have dissected the uplands into a peneplain (an area reduced almost to a plain by erosion) with isolated hills.