Indian Physical Geography› Himalayas, Peninsular Block, Hills, Peaks and Glaciers
Which of the following statements regarding Himalayas are correct? I. Himalayas are geologically young and structurally fold mountains. II. They are wide in Kashmir and narrow in the North-eastern states. III. The folds of Great Himalayas are asymmetrical in nature and their core is composed of granite. IV. The longitudinal valleys lying between Greater and Lesser Himalayas are known as Duns. Select the correct answer using the codes given below:
Answer b.
Option b. Statements I, II and III are correct. Statement IV is wrong because duns lie between the Lesser Himalaya and the Shiwaliks, not between the Greater and Lesser Himalaya. The Himalayas are young fold mountains formed by the collision of the Indian and Eurasian plates. They are about 400 km wide in Kashmir and narrow to about 150 km in Arunachal Pradesh. The Greater Himalaya (Himadri) has asymmetrical folds and a granite core. Duns are flat-floored longitudinal valleys between the Lesser Himalaya (Himachal) and the outer Shiwaliks, for example Dehradun, Kotli Dun and Patli Dun. Statement IV places them in the wrong belt.
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