explain the structure of the Himalayan range
Answers
The Outer Himalayas comprise flat-floored structural valleys and the Siwalik Range, which borders the Himalayan mountain system to the south. Except for small gaps in the east, the Siwaliks run for the entire length of the Himalayas, with a maximum width of 62 miles (100 km) in the northern Indian state of Himachal Pradesh. In general, the 900-foot (275-metre) elevation contour line marks their southern boundary; they rise an additional 2,500 feet (760 metres) to the north. The main Siwalik Range has steeper southern slopes facing the Indian plains and descends gently northward to flat-floored basins, called duns. The best-known of those is the Dehra Dun, in southern Uttarakhand state, just north of the border with northwestern Uttar Pradesh state.
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