
As the Himalayas rose, the forces of erosion kept pace. Detritus and sediment from the
rising Himalaya were deposited in a skirt at the base of the growing chain. These sediments
were themselves up thrust in the last major folding event as the Indian plate pushed and
ground against the Eurasian continent. This narrow strip, which is nonetheless 2,000
kilometers long, and forms a continuous chain, is known as the Shivaliks. Structurally,
their sediments reflect the history of the up thrust of the emergent Himalayas and
numerous mammalian fossil finds testify to the youthfulness of the Himalaya.
Longitudinal valleys lying between the Shivaliks and the main range to the
north, are known as Dun valleys. The best known example is of course Dehradun. In these
cases the general slope is towards the middle of the valley and sediments brought down
from streams from both north and south are called Dun gravels. Dense growths of Sal and
riverine forest have been cleared over the years from the Dun valley, to make way for
cultivation.etc
Once peppered with small principalities and kingdoms, straddling major trade routes in and
out of the interior Himalayan regions, they prospered, till their eventual eclipse
commenced during the British raj.
the seat of Princely administration for the next few centuries.
drawing rooms straight from the Paris of the last century.
gunsmith in the main marketplace, who takes an inordinate pride in his work.
Like people everywhere, they have their complaints and the citizens of Nahan weren't any too
impressed with Nahan's track record viz an underground drainage system and an elected
municipality..... and they had a valid point. Booming populations have routed to the dustbin
civic services catering to the demand loads of the last century.

Another dun valley, the Patli dun, forms part of the Corbett National park. Thus this is one
of the only regions of the Shivaliks to retain it's forest cover and diversity of wildlife
species. Here in the valley of the Ramganga, we have a chance to observe species which
were once fairly prevalent across the entire Shivalik belt. Thick grass lands clothe the valley
floor, while the slopes bear verdant Sal forests. Ungulates like the barking deer and the
spotted deer thrive, tigers are plenty and the rivers are flush with Mahseer and the
occasional waiting Ghariyal.
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