Physical Divisions of Rajasthan:
1. The Western Desert region
2. The Semi-Arid region
3. The Aravalli region
4. The Eastern region
5. The South-Eastern Plateau region
(a) The Western Desert region: It comprised of comprising of Bikaner, Barmer, Jaisalmer, Churu and Western Nagaur the largest region with average height of 300 cm, has three parallel belts of Marusthali (sand dunes), Bangar (large plains) and Rahi (flood plains). Hills of sands are known as Dhore. A big change was brought about with Indira Gandhi Canal. 25 cms. Isohyte forms Eastern boundary.
(b) The Semi-Arid region: From North¬East to South to West in the Aravalli mountain ranges, average height 450 mt, Isohyte of 25 cm forms Western boundary. Pali, Jallore, Sikar, Jhunjhunu, Churu and Hanumangarh fall in the region. Its subregion has Luni Basin, Shekhawati, Nagaur high and Ghaggar plain.
(c) The Aravalli region (Aadwala mountain): Extending in 692 kms length, the oldest mountain ranges of tfye world, fall in height from South¬West to North-East, Guru-Shikhar (1722) mts. Its highest peak is also called ‘Santonka Shikhar’ by Col. Tod. Its subregions- North-East hills, Central Aravalli, Mewar hill or Bhorat and Abu mountain. Dsuri and Hathi are two important passes.
(d) The Eastern Plain Region: It is spread in the eastern part includes lower parts of Chambal basin is called Chappan, Plain, Banas and Mahi basin. Two parts of Banas Basin- Malpurakarauli and Mewar plain. Mahi and Banas are the major rivers.
(e) The South-Eastern Plateau region: or the Harauti region includes Baran, Bundi, Kota and Jhalawar districts. It is rich in black soil and has famous Chulia waterfall, the Mukandra and Bundi hills.