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The Indian Mountains - Coggle Diagram
The Indian Mountains
Based on river valleys
West-east extent
Punjab Himalayas
Kumaon Himalayas
Napal Himalayas
Assam Himalayas
Indus --> Sutlej --> Kali --> Teesta --> Dihang
Eastern Mountains
Purvanchal
Patkai Hills
Naga Hills
Manipur Hills
Mizo Hills
Composed of sedimentary rocks
Divided on north-south basis
Himalayas
Formed by upliftment of Tethys Sea
Young fold mountains
Located on the northern border of India
From Indus to Brahmaputra River
Loftiest and most rugged barriers in the world
Distance - 2400 kms
Width: West - 400 kms, East - 150 kms
Divisions
Himachal
Lesser Himalayas
Most rugged out of the three divisions
Composed of compressed rocks
Average Altitude - 3700 to 4500 metres
Average Width - 50 kms
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Shiwaliks
Outer-most Himalayas
Average Width - 10 to 50 kms
Average Altitude - 900 to 1100 metres
Composed of sediments brought by rivers from Himadri and Himachal
Valleys are made up of gravel and aluvium
Himadri
Great or Inner Himalayas
Most continuous range
All prominent peaks
Average Altitude - 6000 metres
Core of the mountains is made of granite
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The longitudinal valleys between Himachal and Shiwaliks are called Duns
Dehradun, Kotli Dun, Patli Dun