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6. The Eastern Hills are collectively known as 'Purvanchal'. These hills running through the north-eastern states are mostly composed of strong sandstones which are sedimentary rocks
7. Which factor modified the relief features of india
# TECTONIC MOVEMENT. The tectonic plates have two types of movement - a. ...
# VOLCANIC ACTIVITIES. Volcanic activities result in the formation of various relief features. ...
# WATER. Water in the hilly region also act as a erosive agent. ...
8. The northern plain of India is formed by three river systems, i.e. the Indus, the Ganga and the Brahmaputra; along with their tributaries. The northern plains are the largest alluvial tract of the world.
9. Alluvial soil can be classified into two groups on the basis of its age - the khaddar and the bhangar. The former is light in colour and is made up of newer deposits. The latter is the older alluvium and is composed of lime nodules or kanker and its composition is clayey.
10.The Himalayas consist of parallel mountain ranges: the Sivalik Hills on the south; the Lower Himalayan Range; the Great Himalayas, which is the highest and central range; and the Tibetan Himalayas on the north.
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