The Sivalik Hills, also known as Churia Hills, are a mountain range of the outer Himalayas. The literal translation of "Sivalik" is 'tresses of Shiva'. [1] The hills are known for their numerous fossils, and is also home to the Soanian Middle Paleolithic archaeological culture. [2]
The Sivalik Hills are a mountain range of the outer Himalayas that stretches over about 2,400 km (1,500 mi) from the Indus River eastwards close to the Brahmaputra River, spanning the northern parts of the Indian subcontinent. It is 10–50 km (6.2–31.1 mi) wide with an average elevation of 1,500–2,000 m (4,900–6,600 ft). Between the Teesta and Raidāk Rivers in Assam is a gap of about 90 km (56 mi). [3] They are well known for their Neogene and Pleistocene aged vertebrate fossils. [4]
Geologically, the Sivalik Hills belong to the Tertiary deposits of the outer Himalayas. [5] They are chiefly composed of sandstone and conglomerate rock formations, which are the solidified detritus of the Himalayas [5] to their north; they are poorly consolidated. The sedimentary rocks comprising the hills are believed to be 16–5.2 million years old. [6]
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 or plains. [7]
The Sivalik Hills are well known for fossils of vertebrates, spanning from the Early Miocene, until the Middle Pleistocene, around 18 million to 600,000 years ago. [8] [9]
Some of the best known fossils from the hills include Megalochelys atlas , the largest known tortoise to have ever existed, [10] the sabertooth cat Megantereon falconeri , [11] Sivatherium giganteum, the largest known giraffid, [12] and the ape Sivapithecus . [13]
Remains of the Lower-Middle Paleolithic Soanian culture dating to around 500,000 to 125,000 years Before Present were found in the Sivalik region. [14] Contemporary to the Acheulean, the Soanian culture is named after the Soan Valley in the Sivalik Hills of Pakistan. The Soanian archaeological culture is found across Sivalik region in present-day India, Nepal and Pakistan. [2]
The carbon stock and carbon sequestration rates of the Churia forests differ among different forest management regimes and are highest in protected areas. [15] [16]
The Himalayas, or Himalaya is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has several peaks exceeding an elevation of 8,000 m (26,000 ft) including Mount Everest, the highest mountain on Earth. The mountain range runs for 2,400 km (1,500 mi) as an arc from west-northwest to east-southeast at the northern end of the Indian subcontinent.
The Indo-Gangetic Plain, also known as the Northern Plain or North Indian River Plain, is a fertile plain spanning 700,000 km2 (270,000 sq mi) across the northern and north-eastern part of the Indian subcontinent. It encompasses northern and eastern India, eastern Pakistan, southern Nepal, and almost all of Bangladesh. It is named after the two major river systems that drain the region–Indus and Ganges.
Sivapithecus is a genus of extinct apes. Fossil remains of animals now assigned to this genus, dated from 12.2 million years old in the Miocene, have been found since the 19th century in the Sivalik Hills of the Indian subcontinent as well as in Kutch. Any one of the species in this genus may have been the ancestor to the modern orangutans.
The geology of the Himalayas is a record of the most dramatic and visible creations of the immense mountain range formed by plate tectonic forces and sculpted by weathering and erosion. The Himalayas, which stretch over 2400 km between the Namcha Barwa syntaxis at the eastern end of the mountain range and the Nanga Parbat syntaxis at the western end, are the result of an ongoing orogeny — the collision of the continental crust of two tectonic plates, namely, the Indian Plate thrusting into the Eurasian Plate. The Himalaya-Tibet region supplies fresh water for more than one-fifth of the world population, and accounts for a quarter of the global sedimentary budget. Topographically, the belt has many superlatives: the highest rate of uplift, the highest relief, among the highest erosion rates at 2–12 mm/yr, the source of some of the greatest rivers and the highest concentration of glaciers outside of the polar regions. This last feature earned the Himalaya its name, originating from the Sanskrit for "the abode of the snow".
The South Asian Stone Age spans the prehistoric age from the earliest use of stone tools in the Paleolithic period to the rise of agriculture, domestication, and pottery in the Neolithic period across present-day India, Pakistan, Bangladesh, Nepal, Bhutan, and Sri Lanka. As in other parts of the world, in South Asia, the divisions of the stone age into the Paleolithic, Mesolithic, and Neolithic periods do not carry precise chronological boundaries; instead, they describe broad phases of technological and cultural development based on the tools and artifacts found at various archaeological sites.
The Sub-Himalayan Range is the southernmost mountains in the Himalayas, located on the Indian subcontinent. Their average height varies between 600 and 1,200 meters, and are not so high in altitude as compared to other mountain ranges in the Himalaya range. The range spans the modern-day countries of Pakistan, India, Nepal, and Bhutan.
Sivatherium is an extinct genus of giraffid that ranged throughout Africa and Eurasia. The species Sivatherium giganteum is, by weight, one of the largest giraffids known, and also one of the largest ruminants of all time.
The geology of Nepal is dominated by the Himalaya, the highest, youngest and a very highly active mountain range. Himalaya is a type locality for the study of on-going continent-continent collision tectonics. The Himalayan arc extends about 2,400 km (1,500 mi) from Nanga Parbat by the Indus River in northern Pakistan eastward to Namche Barwa by the gorge of the Tsangpo-Brahmaputra in eastern Tibet. About 800 km (500 mi) of this extent is in Nepal; the remainder includes Bhutan and parts of Pakistan, India, and China.
The Doon Valley is an unusually wide, long valley within the Sivalik Hills and the Lesser Himalayas, in the Indian states of Uttarakhand, Himachal Pradesh and Haryana. Within the valley lies the city of Dehradun, the winter capital of Uttarakhand state.
Shivalik Fossil Park, also known as the Suketi Fossil Park, is a notified National Geo-heritage Monument fossil park in the Sirmaur district in the Indian state of Himachal Pradesh. It has a collection of prehistoric vertebrate fossils and skeletons recovered from the upper and middle Siwaliks geological formations of sandstones and clay at Suketi. The Siwalik ranges are located in the outer Himalayas. The park has a display of the fossil finds and an open-air exhibition of six life-sized fiberglass models of extinct mammals in a recreation of the Sivalik Hills environment of the Plio-Pleistocene era. A museum, within the precincts of the park curated and exhibits the fossils. Shivalik is Asia's biggest fossil park. The exhibits in the park are used to generate scientific interest among the public, and facilitate special international studies by visiting research scholars from all over the world.
The Soanian culture is a prehistoric technological culture from the Siwalik Hills, Pakistan. It is named after the Soan Valley in Pakistan.
Bramatherium is an extinct genus of giraffids that ranged from India to Turkey in Asia. It is closely related to the larger Sivatherium.
The Inner Terai Valleys of Nepal comprise several elongated river valleys in the southern lowland Terai part of the country. These tropical valleys are enclosed by the Himalayan foothills, viz the Mahabharat Range and the Sivalik Hills farther south.
The Indian Himalayan Region is the section of the Himalayas within the Republic of India, spanning thirteen Indian states and union territories, namely Ladakh, Jammu and Kashmir, Himachal Pradesh, Uttarakhand, Sikkim, West Bengal, Manipur, Meghalaya, Mizoram, Nagaland, Tripura, Assam, and Arunachal Pradesh. The region is responsible for providing water to a large part of the Indian subcontinent and contains various flora and fauna.
The ecology of the Himalayas varies with climate, rainfall, altitude, and soils. The climate ranges from tropical at the base of the mountains to permanent ice and snow at the highest elevations. The amount of yearly rainfall increases from west to east along the southern front of the range. This diversity of climate, altitude, rainfall and soil conditions supports a variety of distinct plant and animal species, such as the Nepal gray langur
Megalochelys is an extinct genus of tortoises that lived from the Miocene to Pleistocene. They are noted for their giant size, the largest known for any tortoise, with a maximum carapace length of over 2 m (6.5 ft) in M. atlas. The genus ranged from western India and Pakistan to as far east as Sulawesi and Timor in Indonesia, though the island specimens likely represent distinct species.
The Himalayan foreland basin is an active collisional foreland basin system in South Asia. Uplift and loading of the Eurasian Plate on to the Indian Plate resulted in the flexure (bending) of the Indian Plate, and the creation of a depression adjacent to the Himalayan mountain belt. This depression was filled with sediment eroded from the Himalaya, that lithified and produced a sedimentary basin ~3 to >7 km deep. The foreland basin spans approximately 2,000 kilometres (1,200 mi) in length and 450 kilometres (280 mi) in width. From west to east the foreland basin stretches across five countries: Pakistan, India, Nepal, Bangladesh, and Bhutan.
Enhydriodon is an extinct genus of mustelids known from Africa, Pakistan, and India that lived from the late Miocene to the early Pleistocene. It contains nine confirmed species, two debated species, and at least a few other undescribed species from Africa. The genus belongs to the tribe Enhydriodontini in the otter subfamily Lutrinae. Enhydriodon means "otter tooth" in Ancient Greek and is a reference to its dentition rather than to the Enhydra genus, which includes the modern sea otter and its two prehistoric relatives.
Sivapardus is an extinct, little-known genus of feline with only one species assigned to it, Sivapardus punjabiensis. It was described in 1969 by the paleontologist Abu Bakr based on a partial mandible from the Upper Siwaliks in Pakistan; the locality it was found at is estimated to be from the Late Pliocene to Early Pleistocene. S. punjabiensis was a large cat with a short and broad snout that may have lived on open grasslands.
Deposits of coal are found in Tosh, Siuja, Azimara and Abidhara in Dang, and a few other places in Sallyan, Rolpa, Pyuthan and Palpa districts of Nepal. The total estimated deposits are about 5 million tons. Due to the low volume of deposits, mining is done by traditional methods. The mines have been exploited since the early 1960s; however due to lack of proper markets, they are not exploited to their full capacity.
27°46′N82°24′E / 27.767°N 82.400°E
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