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The Sivalik Hills
Sivalik Hills
is a mountain range of the outer Himalayas. It is about 2,400 km (1,500 mi) long enclosing an area that starts almost from the Indus and ends close to the Brahmaputra, with a gap of about 90 kilometres (56 mi) between the Teesta and Raidak rivers in Assam. The width of the Sivalik Hills
Sivalik Hills
varies from 10 to 50 km (6.2 to 31.1 mi), their average elevation is 1,500 to 2,000 m (4,900 to 6,600 ft).[1] In some Sanskrit
Sanskrit
texts, the region is called Manak Parbat.[2] Shivalik literally means 'tresses of Shiva’.[3]

Contents

1 Geology 2 Pre-history 3 Demographics 4 In culture 5 See also 6 References

Geology[edit]

The Gangas
Gangas
cutting through the Sivalik Hills

View of the Sivalik Hills
Sivalik Hills
from Sukhna Lake

Geologically, the Sivalik Hills
Sivalik Hills
belong to the Tertiary deposits of the outer Himalayas.[4] They are chiefly composed of sandstone and conglomerate rock formations, which are the solidified detritus of the Himalayas[4] to their north; they poorly consolidated. The remnant magnetization of siltstones and sandstones indicates that they were deposited 16–5.2 million years ago. In Nepal, the Karnali River exposes the oldest part of the Sivalik Hills.[5] They are the southernmost and geologically youngest east-west mountain chain of the Himalayas. They have many sub-ranges and extend west from Arunachal Pradesh
Arunachal Pradesh
through Bhutan
Bhutan
to West Bengal, and further westward through Nepal
Nepal
and Uttarakhand, continuing into Himachal Pradesh
Himachal Pradesh
and Kashmir. The hills are cut through at wide intervals by numerous large rivers flowing south from the Himalayas.[citation needed] They are bounded on the south by a fault system called the Main Frontal Thrust, with steeper slopes on that side. Below this, the coarse alluvial Bhabar zone makes the transition to the nearly level plains. Rainfall, especially during the summer monsoon, percolates into the Bhabar, then is forced to the surface by finer alluvial layers below it in a zone of springs and marshes along the northern edge of the Terai
Terai
or plains.[6] North of the Sivalik Hills
Sivalik Hills
the 1,500–3,000 meter Lesser Himalayas also known as the Mahabharat Range rise steeply along fault lines. In many places the two ranges are adjacent but in other places structural valleys 10–20 km wide separate them.[citation needed] Pre-history[edit] Sivapithecus
Sivapithecus
(a kind of ape, formerly known as Ramapithecus) is among many fossil finds in the Siwalik region. The Siwalik Hills are also among the richest fossil sites for large animals anywhere in Asia. The Hills had revealed that all kinds of animals lived there. They were early ancestors to the sloth bear, Sivatherium, an ancient giraffe, Colossochelys atlas, a giant tortoise named the Siwaliks giant tortoise[7] Megalochelys atlas
Megalochelys atlas
amongst other creatures. The remains of the Lower Paleolithic
Lower Paleolithic
(ca. 500,000 to 125,000 BP) Soanian
Soanian
culture have been found in the Siwalik region.[8][9] Contemporary to the Acheulean, the Soanian
Soanian
culture is named after the Soan Valley in the Siwalik Hills of Pakistan. The bearers of this culture were Homo erectus. Demographics[edit] Low population densities in the Siwalik and along the steep southern slopes of the Mahabharat Range, plus virulent malaria in the damp forests on their fringes create a cultural, linguistic and political buffer zone between dense populations in the plains to the south and the "hills" beyond the Mahabharat escarpment, isolating the two populations from each other and enabling different evolutionary paths with respect to language, race and culture. People of the Lepcha tribe inhabit the Sikkim and Darjeeling areas. In culture[edit] The Indian Navy's Shivalik class frigate
Shivalik class frigate
is named after these ranges. See also[edit]

Margalla Hills
Margalla Hills
— subrange in Islamabad region. Shivalik Fossil
Fossil
Park Frederick Walter Champion, forester and wildlife photographer was posted here after World War I
World War I
until 1947 Dundwa Range – subrange separating Deukhuri—an Inner Terai
Terai
valley in western Nepal—from the Outer Terai
Terai
in Balrampur and Shravasti districts, Utter Pradesh

References[edit]

Wikimedia Commons has media related to Shivalik Hills.

Wikisource
Wikisource
has the text of the 1911 Encyclopædia Britannica article Siwalik Hills.

^ Kohli, M. S. (2004). Mountains of India: Tourism, Adventure, Pilgrimage. Indus Publishing, New Delhi. ^ Kohli, M.S. (2002). Mountains of India: Tourism, Adventure and Pilgrimage. Indus Publishing. pp. 25–. ISBN 978-81-7387-135-1.  ^ Balokhra, J. M. (1999). The Wonderland of Himachal Pradesh. Revised and enlarged 4th edition. H.G. Publications, New Delhi. ^ a b  Chisholm, Hugh, ed. (1911). "Siwalik Hills". Encyclopædia Britannica. 25 (11th ed.). Cambridge University Press. pp. 163–164.  ^ Gautam, P., Fujiwara, Y. (2000). "Magnetic polarity stratigraphy of Siwalik Group sediments of Karnali River section in western Nepal". Geophysical Journal International. 142 (3): 812–824. CS1 maint: Uses authors parameter (link) ^ Mani, M.S. (2012). Ecology and Biogeography in India. Springer Science & Business Media. p. 690.  ^ http://www.bbc.com/earth/story/20150519-the-truth-about-giant-tortoises ^ Lycett, Stephen J (2007), "Is the Soanian
Soanian
techno-complex a Mode 1 or Mode 3 phenomenon? A morphometric assessment", Journal of Archaeological Science, 34 (9): 1434, doi:10.1016/j.jas.2006.11.001  ^ Distribution of Acheulian sites in the Siwalik region

v t e

Geography of South Asia

Mountains and plateaus

Himalayas

Mount Everest

Western Ghats Eastern Ghats Aravalli Range Nilgiris Vindhya Range Satpura Range Garo Hills Shivalik Hills Mahabharat Range Khasi Hills Anaimalai Hills Cardamom Hills Sulaiman Mountains Toba Kakar Range Karakoram Hindu Kush Chittagong Hill Tracts Deccan Plateau Thar Desert Makran Chota Nagpur Naga Hills Mysore Plateau Ladakh
Ladakh
Plateau Gandhamardan Hills Malwa

Lowlands and islands

Indo-Gangetic plain Doab Indus Valley Indus River
Indus River
Delta Ganges Basin Ganges Delta Terai Atolls of the Maldives Coromandel Coast Konkan Lakshadweep Andaman and Nicobar Islands Sundarbans Reserve Forest Greater Rann of Kutch Little Rann of Kutch Protected areas in Tamil Nadu

By country

India Pakistan Nepal Bhutan Sri Lanka Bangladesh Maldives Afghanistan

Coordinates: 27°46′N 82°24′E / 27.767°N 82.400°E / 27.767; 82.400

Authority control

WorldCat Identities VIAF: 235946

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