Geology of Nepal

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Geology of Nepal

Post  kosovohp on Thu Oct 28, 2010 1:49 am

Nepal is of roughly trapezoidal shape, 800 kilometres (497 mi) long and 200 kilometres (124 mi) wide, with an area of 147,181 km2 (56,827 sq mi). See List of territories by size for the comparative size of Nepal.

Nepal is commonly divided into three physiographic areas: the Mountain, Hill, Siwalik region and Terai Regions. These ecological belts run east-west and are vertically intersected by Nepal's major, north to south flowing river systems.

The southern lowland plains or Terai bordering India are part of the northern rim of the Indo-Gangetic plains. They were formed and are fed by three major Himalayan rivers: the Kosi, the Narayani, and the Karnali as well as smaller rivers rising below the permanent snowline. This region has a subtropical to tropical climate. The outermost range of foothills called Shiwalik or Churia Range cresting at 700 to 1,000 metres (2,297 to 3,281 ft) marks the limit of the Gangetic Plain, however broad, low valleys called Inner Tarai (Bhitri Tarai Uptyaka) lie north of these foothills in several places.
Mount Everest
Barun Valley There are many such valleys in the Himalaya created by glacier flows.
Gosainkunda Lake in Langtang.

The Hill Region (Pahad) abuts the mountains and varies from 800 to 4,000 metres (2,625 to 13,123 ft) in altitude with progression from subtropical climates below 1,200 metres (3,937 ft) to alpine climates above 3,600 metres (11,811 ft). The Mahabharat Lekh reaching 1,500 to 3,000 metres (4,921 to 9,843 ft) is the southern limit of this region, with subtropical river valleys and "hills" alternating to the north of this range. Population density is high in valleys but notably less above 2,000 metres (6,562 ft) and very low above 2,500 metres (8,202 ft) where snow occasionally falls in winter.

The Mountain Region (Parbat), situated in the Great Himalayan Range, makes up the northern part of Nepal. It contains the highest elevations in the world including 8,848 metres (29,029 ft) height Mount Everest (Sagarmatha in Nepali) on the border with China. Seven other of the world's eight thousand metre peaks are in Nepal or on its border with China: Lhotse, Makalu, Cho Oyu, Kanchenjunga, Dhaulagiri, Annapurna and Manaslu.

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