Give a brief desc

The three major divisions of Himalayas from North to South are; The Greater Himalayas or the Himadari, The Lesser Himalayas also called Himachal and The Shiwalik or Outer Himalayas. The outermost range of Himalayas is the Shiwaliks.

1. Its height varies between 900 and 1,100 m.

2. Its average width extends over 10-50 km.

3. They are composed of coarse sediments brought down by rivers from rivers from the main Himalayan ranges.

4. These valleys are covered with thick gravel and alluvium.