1. It is largest region in size.
2. It can be divided into three parallel belts as:
1. It extends from west to east, it is rich in sand dunes.
2. Bangar plains made of sandy soil.
3. Rahi floodplains formed due to small rivers.
3. This region has approximately 300 m average height.
4. Eastern boundary forms the rain divider of 25 cms.
5. Here sand hills are found which are called ‘Dhore’ in local language.
6. Physical environment has changed due to Indira Gandhi canal, earlier known as Rajasthan canal.
