On the basis of the existing relief features, Rajasthan has been divided into the following physiographic divisions:
Western Sandy Plains
The surface of western Rajasthan is covered with vast stretches of sand occasionally interrupted by rocky protruding right up to the Pakistan border.
Aravalli Range And Hilly Region
The principal and most dominant mountain range of Rajasthan is the Aravalli range. The geological history of the Aravalli range can be traced back probably close of the dharwar times. This range runs diagonally across the State from northeast near Delhi and extends to southwest up to the Plains of Gujarat, for a distance of about 692 kilometers.
Eastern Plains
The area on the northeast, east and southeast of the Aravalli range is known as the Eastern Plain. The Vindhyan Plateau marks the southeastern limit of the Plain. The western boundary is demarcated by the eastern edge of the Aravalli up to north of Udaipur.
Southeastern Rajasthan Pathar (Hadoti Plateau)
The eastern part along the Chambal River is covered by the Hadoti Plateau. The Great Boundary Fault of the Aravallis forms its northwest boundary which extends eastward across the Rajasthan border. River Chambal drains the large part of this area.
