- The crust of the earth has been formed of seven major and minor plates.
- The movements of the plates result in folding, faulting and volcanic activity.
- The oldest landmass was a part of Gondwanaland, a part of the super continent Pangaea.
- The major physio graphic divisions of India are: The Himalayan mountains, The Northern Plains, the peninsular Plateau, The Indian Desert, The Coastal plains, The islands.
- Himalayas have more than 6 of the tallest 10 mountain peaks of the world.
- Kanchenjunga is the tallest mountain in India.
- The northern plain has been formed due to the play of three major rivers: Indus, Ganga and the Brahmaputra.
- The Anai Mudi(2,695 m) and the Doda betta (2,637 m) are the highest peaks of the southern India.
- Mahendragiri(1,501 m) is the highest peak of Eastern Ghats.
- The Chilika Lake is the largest salt water lake in India.
Class 9th Geography Chapter 2 Notes
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