Day-5 Answer Writing Challenge : Model Answer

Question: Explain the formation of Duars and Doons. (4 Marks)

Answer: 

Duns’ are longitudinal valleys between the Lesser Himalayas and the Shiwaliks. Dun is a local word for valley, particularly an open valley in the Shivalik’s or between the Shivalik’s and higher Himalayan foothills. Other valleys in this region have names like Patli Dun, Kotli Dun, Pinjore Dun in Himachal. The longitudinal valley is a valley between the lesser Himalayas and Shivalik are known as ‘duns’ in the west and ‘duars’ in the east.

FORMATION OF DUNS (DURAS)

• Shiwalik Hills were formed by the accumulation of conglomerates (sand, stone, silt, gravel, debris, ). These conglomerates, in the initial stages of deposition, obstructed the courses of the rivers draining from the higher reaches of the Himalayas and formed temporary lakes.
• With the passage of time, these temporary lakes accumulated more and more conglomerates. The conglomerates were well settled at the bottom of the
• When the rivers were able to cut their courses through the lakes filled with conglomerate deposits, the lakes were drained away leaving behind plains called ‘duns’ or ‘doons’ in the west and ‘duars’ in the
• Dehra Dun in Uttarakhand is the best
• Kotah, Patli Kothri, Chumbi, Kyarda, Chaukhamba, Udhampur, and Kotli are other important