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70-689: The Tibetan Plateau , also known as Qinghai–Tibet Plateau and Qing–Zang Plateau , is a vast elevated plateau located at the intersection of Central , South , and East Asia .. Geographically, it is located to the north of Himalayas and the Indian subcontinent , and to the south of Tarim Basin and Mongolian Plateau . Geopolitically, it covers most of the Tibet Autonomous Region , most of Qinghai , western half of Sichuan , Southern Gansu provinces in Western China , southern Xinjiang , Bhutan ,

140-522: A forest steppe to a desert . By 12   Ma, the climate had dried enough to break Qaidam's single lake into separate basins, which frequently became saline. During the Pliocene (5–2.5   Ma), the focus of most sedimentation was at what is now Kunteyi but, during the Pleistocene (after 2.5   Ma), tectonic activity shifted the basin's tributaries and floor, moving the focus of sedimentation from

210-556: A " water tower " storing water and maintaining flow . It is sometimes termed the Third Pole because its ice fields contain the largest reserve of fresh water outside the polar regions. The impact of climate change on the Tibetan Plateau is of ongoing scientific interest. The Tibetan Plateau is surrounded by the massive mountain ranges of high-mountain Asia . The plateau is bordered to

280-455: A few other saline lakes occupy over one-fourth of the basin, with the sediments deposited since the Jurassic as deep as 10 to 14 km (6–9   mi) in places despite tectonic activity having repeatedly shifted the center of the region's sedimentation. The seasonal nature and commercial exploitation of some of the lakes makes an exact count problematic: one count reckoned there were 27 lakes in

350-533: A higher speed than in any other part of the world. In the short term, this will cause lakes to expand and bring floods and mudflows. In the long run, the glaciers are vital lifelines for Asian rivers, including the Indus and the Ganges . Once they vanish, water supplies in those regions will be in peril. The Tibetan Plateau contains the largest area of low- latitude glaciers and is particularly vulnerable to global warming. Over

420-566: A result of this extremely inhospitable environment, the Changtang region (together with the adjoining Kekexili region) is the least populous region in Asia and the third least populous area in the world after Antarctica and northern Greenland. The geological history of the Tibetan Plateau is closely related to that of the Himalayas. The Himalayas belong to the Alpine Orogeny and are therefore among

490-542: A river was already there, though not necessarily on exactly the same course. Then, subterranean geological forces caused the land in that part of North America to gradually rise by about a centimeter per year for millions of years. An unusual balance occurred: the river that would become the Colorado River was able to erode into the crust of the Earth at a nearly equal rate to the uplift of the plateau. Now, millions of years later,

560-415: A steady wind to blow toward the land, which brings the moist air over the ocean surface with it. Rainfall is then increased by the presence of the moist ocean air. The rainfall is stimulated by a variety of mechanisms, such as low-level air being lifted upwards by mountains, surface heating, convergence at the surface, divergence aloft, or from storm-produced outflows near the surface. When such lifting occurs,

630-620: A term usually referring to the localized, diurnal cycle of circulation near coastlines everywhere, but they are much larger in scale, stronger and seasonal. The seasonal monsoon wind shift and weather associated with the heating and cooling of the Tibetan plateau is the strongest such monsoon on Earth. Today, Tibet is an important heating surface of the atmosphere. However, during the Last Glacial Maximum , an approximately 2,400,000 square kilometres (930,000 sq mi) ice sheet covered

700-717: Is broadly divided into three blocks: the Mangya Depression, a northern fault zone, and the Sanhu Depression . Qaidam is an intermontane basin, surrounded on all sides by mountain ranges. In the south, the Kunlun Mountains separate it from the higher central section of the Tibetan Plateau . In the north, a number of smaller ridges like the Shulenanshan separate it from another higher plateau, which usually referenced by

770-548: Is controlled by the Altyn Tagh fault constituting the northern basin boundary. The basin's large mineral deposits caused a great deal of investment interest from 2005. Qarhan Playa , a salt flat including about ten of the lakes, contains over 50 billion metric tons (55 billion short tons) of salt . Beneath the salt, Qaidam is one of China's nine most important petroliferous basins and its largest center of onshore production. The Qinghai Oilfield, exploited since 1954, includes

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840-409: Is distributed vertically through a "mixed layer" that may be 50 meters deep through the action of wind and buoyancy-generated turbulence , whereas the land surface conducts heat slowly, with the seasonal signal penetrating only a meter or so. Additionally, the specific heat capacity of liquid water is significantly greater than that of most materials that make up land. Together, these factors mean that

910-609: Is divided into three main flat regions: the Bogotá savanna , the valleys of Ubaté and Chiquinquirá , and the valleys of Duitama and Sogamoso . The parallel Sierra of Andes delimit one of the world highest plateaux: the Altiplano , (Spanish for "high plain"), Andean Plateau or Bolivian Plateau. It lies in west-central South America, where the Andes are at their widest, is the most extensive area of high plateau on Earth outside of Tibet. The bulk of

980-683: Is sometimes called the Roof of Africa due to its height and large area. Another example is the Highveld which is the portion of the South African inland plateau which has an altitude above approximately 1,500 metres, but below 2,100 metres, thus excluding the Lesotho mountain regions. It is home to some of the largest South African urban agglomerations . In Egypt are the Giza Plateau and Galala Mountain , which

1050-528: Is the Scottish Highlands . Plateaus are classified according to their surrounding environment. The highest African plateau is the Ethiopian Highlands which cover the central part of Ethiopia. It forms the largest continuous area of its altitude in the continent, with little of its surface falling below 1,500 metres (4,921 ft), while the summits reach heights of up to 4,550 metres (14,928 ft). It

1120-558: Is the home of more than 70 million people. The Western Plateau , part of the Australian Shield , is an ancient craton covering much of the continent's southwest, an area of some 700,000 square kilometres. It has an average elevation between 305 and 460 metres. The North Island Volcanic Plateau is an area of high land occupying much of the centre of the North Island of New Zealand, with volcanoes, lava plateaus, and crater lakes,

1190-548: The Changtang , is generally too high and cold to support permanent population. One of the most notable civilizations to have developed on the Tibetan Plateau is the Tibetan Empire from the 7th century to the 9th century AD. Monsoons are caused by the different amplitudes of surface temperature seasonal cycles between land and oceans. This differential warming occurs because heating rates differ between land and water. Ocean heating

1260-450: The Dalangtan to Qarhan area. During this time, the record's glacial intervals suggest a low-temperature climate and its sandstone yardangs attest to strong winds. From 770,000 and 30,000 years ago, the enormous lake which filled much of the southeastern basin alternated nine times between being a fresh- and saltwater lake. Pollen studies suggest the bed of Dabusun Lake in

1330-847: The Deccan Plateau (≈1,900,000 km (730,000 sq mi), elevation 300–600 metres (980–1,970 ft)). A large plateau in North America is the Colorado Plateau , which covers about 337,000 km (130,000 sq mi) in Colorado , Arizona , New Mexico , and Utah . In northern Arizona and southern Utah the Colorado Plateau is bisected by the Colorado River and the Grand Canyon . This came to be over 10 million years ago,

1400-525: The Eurasian Plate . About 50 million years ago, this fast-moving Indo-Australian plate had completely closed the Tethys Ocean , the existence of which has been determined by sedimentary rocks settled on the ocean floor, and the volcanoes that fringed its edges. Since these sediments were light, they crumpled into mountain ranges rather than sinking to the floor. During this early stage of its formation in

1470-630: The Indian regions of Ladakh and Lahaul and Spiti ( Himachal Pradesh ) as well as Gilgit-Baltistan in Pakistan , northwestern Nepal , eastern Tajikistan and southern Kyrgyzstan . It stretches approximately 1,000 kilometres (620 mi) north to south and 2,500 kilometres (1,600 mi) east to west. It is the world's highest and largest plateau above sea level, with an area of 2,500,000 square kilometres (970,000 sq mi). With an average elevation exceeding 4,500 metres (14,800 ft) and being surrounded by imposing mountain ranges that harbor

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1540-485: The Miocene (23–5   Ma), this lake spread at the present 2,800 m (9,200 ft) elevation contour over 300 km (190 mi) and was among the largest lakes in the world . Nutrient-rich inflows contributed to plankton blooms, which supported an ecosystem that built up reserves of organic carbon. The Tibetan plateau's uplift, however, eventually cut it off from the warm and humid Indian monsoon . It went from

1610-516: The North China Craton from at least 1 billion years ago, before breaking off c.  560 million years ago at the end of the Neoproterozoic . It was an island in a shallow sea until uplift beginning around 400   Ma finally rejoined it to the mainland by 200   Ma. Three-dimensional modeling shows that the present basin has been squeezed to an irregular diamond shape since

1680-671: The thermal low pressure caused by the heating, there was no monsoon over the Indian subcontinent . This lack of monsoon caused extensive rainfall over the Sahara , expansion of the Thar Desert , more dust deposited into the Arabian Sea , and a lowering of the biotic life zones on the Indian subcontinent. Animals responded to this shift in climate, with the Javan rusa migrating into India. In addition,

1750-552: The " Roof of the World ", which is still being formed by the collisions of the Indo-Australian and Eurasian tectonic plates . The Tibetan Plateau covers approximately 2,500,000 km (970,000 sq mi), at about 5,000 m (16,000 ft) above sea level. The plateau is sufficiently high to reverse the Hadley cell convection cycles and to drive the monsoons of India towards

1820-662: The Altiplano lies within Bolivian and Peruvian territory while its southern parts lie in Chile. The Altiplano plateau hosts several cities like Puno, Oruro, El Alto and La Paz the administrative seat of Bolivia. Northeastern Altiplano is more humid than the Southwestern, the latter of which hosts several salares , or salt flats, due to its aridity. At the Bolivia-Peru border lies Lake Titicaca ,

1890-637: The Chinese lowlands. Ice of the plateau provides a valuable window to the past. In 2015, researchers studying the Plateau reached the top of the Guliya glacier , with ice thickness of 310 m (1,020 ft), and drilled to a depth of 50 m (160 ft) in order to recover ice core samples. Due to the extremely low biomass in those 15,000-year-old samples, it had taken around 5 years of research to extract 33 viruses, of which 28 were new to science. None had survived

1960-622: The Huatugou field with a major refinery at Golmud , and the Sebei gas fields are connected to Xining , Lanzhou , and Yinchuan . Qaidam has reserves of asbestos , borax , gypsum , and several metals , with the greatest reserves of lithium , magnesium , potassium , and sodium found anywhere in China. The Xining-Golmud rail line (the first stage of the Qinghai–Tibet Railway ), which crossed

2030-872: The Late Palaeogene, Tibet consisted of a deep palaeovalley bounded by multiple mountain ranges rather than the more topographically uniform elevated flatland that it is today. The Tibetan Plateau's mean elevation continued to vary since its initial uplift in the Eocene; isotopic records show the plateau's altitude was around 3,000 metres above sea level around the Oligocene-Miocene boundary and that it fell by 900 metres between 25.5 and 21.6 million years ago, attributable to tectonic unroofing from east–west extension or to erosion from climatic weathering. The plateau subsequently rose by 500 to 1,000 metres between 21.6 and 20.4 million years ago. Palaeobotanical evidence indicates that

2100-532: The Lenghu, Gasikule, Yuejin-2, and Huatugou oil fields and the Sebei-1, Sebei-2, and Tainan gas fields. All together, it has proven reserves of 347.65 million metric tons (more than 2 billion barrels ) of petroleum and 306.6 billion cubic meters (10.83 trillion cubic feet) of natural gas . Annual production capacity is about 2 million metric tons of petroleum and 8.5 billion cubic meters of natural gas. A pipeline connects

2170-698: The North Rim of the Grand Canyon is at an elevation of about 2,450 m (8,040 ft) above sea level , and the South Rim of the Grand Canyon is about 2,150 m (7,050 ft) above sea level. At its deepest, the Colorado River is about 1,830 m (6,000 ft) below the level of the North Rim. Another high-altitude plateau in North America is the Mexican Plateau . With an area of 601,882 km (232,388 sq mi) and average height of 1,825 metres, it

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2240-736: The Nujiang Suture Zone and the Yarlung-Zangpo Suture Zone remained tropical or subtropical lowlands until the latest Oligocene or Early Miocene , enabling biotic interchange across Tibet. The age of east–west grabens in the Lhasa and Himalaya terranes suggests that the plateau's elevation was close to its modern altitude by around 14 to 8 million years ago. Erosion rates in Tibet decreased significantly around 10 million years ago. The Indo-Australian plate continues to be driven horizontally below

2310-517: The Qaidam Basin proper from that of Qinghai Lake to the east. Despite this lower elevation, Qaidam is still high enough that its mean annual temperature is 2–4 °C (36–39 °F) despite lying on the same latitude as Algeria , Greece , and Virginia in the United States . The crescent-shaped basin covers an area of approximately 120,000 km (46,000 sq mi). Its substrate

2380-472: The Qarhan Playa—nearly the lowest point of the basin—was elevated about 700 m (2,300 ft) within the last 500,000 years. At around 30 kya , this great—at the time, freshwater—lake spread over at least 25,000 km (9,700 sq mi) with a surface 50–60 m (160–200 ft) above the present levels of its successors. At the same time, a river from the "Kunlun" paleolake to its south

2450-427: The Tibetan Plateau, which forces the plateau to move upwards; the plateau is still rising at a rate of approximately 5 mm (0.2 in) per year (although erosion reduces the actual increase in height). Much of the Tibetan Plateau is of relatively low relief. The cause of this is debated among geologists. Some argue that the Tibetan Plateau is an uplifted peneplain formed at low altitude, while others argue that

2520-520: The Tibetan plateau from around 200,000 to 40,000 years ago, according to a study published in Nature . Nomads on the Tibetan Plateau and in the Himalayas are the remainders of nomadic practices historically once widespread in Asia and Africa. Pastoral nomads constitute about 40% of the ethnic Tibetan population. The presence of nomadic peoples on the plateau is predicated on their adaptation to survival on

2590-432: The air cools due to expansion in lower pressure, which in turn produces condensation and precipitation. In winter, the land cools off quickly, but the ocean maintains the heat longer. The hot air over the ocean rises, creating a low-pressure area and a breeze from land to ocean while a large area of drying high pressure is formed over the land, increased by wintertime cooling. Monsoons are similar to sea and land breezes ,

2660-468: The basin, another reckoned 43 with a total area of 16,509 km (6,374 sq mi). The aridity, salinity, wide diurnal and seasonal temperature swings, and relatively high ultraviolet radiation has led to Qaidam being studied by the China Geological Survey as a Mars analogue for use in testing spectroscopy and equipment for China's 2020 Mars rover program . Qaidam was part of

2730-672: The basin, about 35,000 km (14,000 sq mi), is desert. Tshwa'i 'Dam is the Wylie romanization of the Tibetan name ཚྭ འི ་ འདམ ་ , meaning " Salt Marsh "; the Tibetan Pinyin romanization of the same name is Caidam . Qaidam is the GNC romanization of its transcription into Mongolian ; Tsaidam is a variant romanization of the same name. Chaidamu is the pinyin romanization of its transcription into Chinese characters ;

2800-622: The beginning of the Cenozoic , with the Indian Plate beginning to impact the ancient Tibetan shoreline somewhere between 55 –35   Ma. At first, Qaidam was at a far lower elevation. Pollen found in core samples shows that the Oligocene (34–23   Ma) was relatively humid. A great lake slowly formed in the western basin, which two major tectonic movements raised and cut off from its original sources of sediment. At its greatest extent during

2870-742: The crust. Tectonic plateaus are formed by tectonic plate movements which cause uplift, and are normally of a considerable size, and a fairly uniform altitude. Examples are the Deccan Plateau in India and the Meseta Central on the Iberian Peninsula . Plateaus can also be formed by the erosional processes of glaciers on mountain ranges, leaving them sitting between the mountain ranges. Water can also erode mountains and other landforms down into plateaus. Dissected plateaus are highly eroded plateaus cut by rivers and broken by deep narrow valleys. An example

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2940-405: The eastern part of the Qaidam Basin in the early 1980s, is an essential transportation link for accessing the region's mineral resources. Additional railroads spanning the basin include the Golmud–Dunhuang Railway completed in December 2019 and a 25 km private railway constructed by Zangge Mining Co., Ltd. The National Development and Reform Commission began conducting preliminary planning for

3010-473: The elevation and low precipitation. The Tibetan Plateau hosts the Tibetan wolf , and species of snow leopard , wild yak , wild ass , cranes, vultures, hawks, geese, snakes, and water buffalo . One notable animal is the high-altitude jumping spider , that can live at elevations of over 6,500 metres (21,300 ft). Ecoregions found on the Tibetan Plateau, as defined by the World Wide Fund for Nature , are as follows: Extinct humans ( Denisovans ) lived on

3080-415: The entire basin, the mean annual rainfall is 26 mm (1 in) but the mean annual evaporation is 3,000–3,200 mm (120–130 in). Because of the low rainfall, these lakes have become saline or dried up completely. Presently, there are four main playas in the basin: Qarhan in the southeast and (from north to south) Kunteyi , Chahanshilatu , and Dalangtan in the northwest. These playas and

3150-410: The escarpment is a range of mountains. In the west, the Kunlun Mountains separate the plateau from the Tarim Basin. About halfway across the Tarim the bounding range becomes the Altyn-Tagh and the Kunluns, by convention, continue somewhat to the south. In the 'V' formed by this split is the western part of the Qaidam Basin . The Altyn-Tagh ends near the Dangjin pass on the Dunhuang – Golmud road. To

3220-409: The extraction process. Phylogenetic analysis suggests those viruses infected plants or other microorganisms. The Tibetan Plateau contains the world's third-largest store of ice. Qin Dahe, the former head of the China Meteorological Administration , issued the following assessment in 2009: Temperatures are rising four times faster than elsewhere in China, and the Tibetan glaciers are retreating at

3290-423: The glaciers in Tibet created meltwater lakes in the Qaidam Basin , the Tarim Basin , and the Gobi Desert , despite the strong evaporation caused by the low latitude. Silt and clay from the glaciers accumulated in these lakes; when the lakes dried at the end of the ice age, the silt and clay were blown by the downslope wind off the Plateau. These airborne fine grains produced the enormous amount of loess in

3360-506: The gods" in the native tongue of the Pemon , the Indigenous people who inhabit the Gran Sabana . Tepuis can be considered minute plateaus and tend to be found as isolated entities rather than in connected ranges, which makes them the host of a unique array of endemic plant and animal species. Some of the most outstanding tepuis are Neblina , Autana , Auyan and Mount Roraima . They are typically composed of sheer blocks of Precambrian quartz arenite sandstone that rise abruptly from

3430-399: The heat capacity of the layer participating in the seasonal cycle is much larger over the oceans than over land, with the consequence that the land warms and cools faster than the ocean. In turn, air over the land warms faster and reaches a higher temperature than does air over the ocean. The warmer air over land tends to rise, creating an area of low pressure . The pressure anomaly then causes

3500-416: The jungle, giving rise to spectacular natural scenery. Auyán-tepui is the source of Angel Falls , the world's tallest waterfall . The Colombian capital city of Bogota sits on an Andean plateau known as the Altiplano Cundiboyacense roughly the size of Switzerland. Averaging a height of 2,600 m (8,500 ft) above sea level, this northern Andean plateau is situated in the country's eastern range and

3570-445: The largest lake in South America. [REDACTED] Media related to Plateaus at Wikimedia Commons Qaidam Basin The Qaidam , Tsaidam , or Chaidamu Basin is a hyperarid basin that occupies a large part of Haixi Prefecture in Qinghai Province , China . The basin covers an area of approximately 120,000 km (46,000 sq mi), one-fourth of which is covered by saline lakes and playas . Around one third of

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3640-403: The latter, the plateau is affected by distributed deformation resulting from flow within the crust. The Tibetan Plateau supports a variety of ecosystems, most of them classified as montane grasslands. While parts of the plateau feature an alpine tundra -like environment, other areas feature monsoon-influenced shrublands and forests. Species diversity is generally reduced on the plateau due to

3710-427: The low relief stems from erosion and infill of topographic depressions that occurred at already high elevations. The current tectonics of the plateau are also debated. The best-regarded explanations are provided by the block model and the alternative continuum model. According to the former, the crust of the plateau is formed of several blocks with little internal deformation separated by major strike-slip faults . In

3780-479: The most notable of which is the country's largest lake, Lake Taupō . The plateau stretches approximately 100 km east to west and 130 km north to south. The majority of the plateau is more than 600 metres above sea level. A tepui ( / ˈ t ɛ p w i / ), or tepuy ( Spanish: [teˈpuj] ), is a table-top mountain or mesa found in the Guiana Highlands of South America, especially in Venezuela and western Guyana . The word tepui means "house of

3850-402: The name of its northern escarpment, the Qilian or Nanshan. In the northwest, the Altyn-Tagh separates it from the Kumtagh Desert of southeastern Xinjiang . Because of this position, Qaidam forms an endorheic basin accumulating lakes with no outlet to the sea. The area is among the most arid non-polar locations on Earth, with some places reporting an aridity index of 0.008–0.04. Across

3920-442: The north-western United States is an example. They may be formed by upwelling of volcanic magma or extrusion of lava. The underlining mechanism in forming plateaus from upwelling starts when magma rises from the mantle , causing the ground to swell upward. In this way, large, flat areas of rock are uplifted to form a plateau. For plateaus formed by extrusion, the rock is built up from lava spreading outward from cracks and weak areas in

3990-497: The past five decades, 80% of the glaciers in the Tibetan Plateau have retreated, losing 4.5% of their combined areal coverage. This region is also liable to suffer damages from permafrost thaw caused by climate change. Plateau Plateaus can be formed by a number of processes, including upwelling of volcanic magma, extrusion of lava, plate tectonics movements, and erosion by water and glaciers. Volcanic plateaus are produced by volcanic activity . The Columbia Plateau in

4060-448: The plateau. Due to its great extent, this glaciation in the subtropics was an important element of radiative forcing . With a much lower latitude, the ice in Tibet reflected at least four times more radiation energy per unit area into space than ice at higher latitudes . Thus, while the modern plateau heats the overlying atmosphere, during the Last Ice Age it helped to cool it. This cooling had multiple effects on regional climate. Without

4130-463: The same name was formerly romanized as the Zaidam Swamp for the Chinese Postal Map . Orographically , the Qaidam Basin is a comparatively low area in the northeastern part of the Qinghai–Tibet Plateau . With an elevation of around 3,000 m (10,000 ft), Qaidam forms a kind of shelf between Tibet to the south (around 4,300 m or 14,000 ft) and Gansu to the north (around 1,100 m or 3,500 ft). A low water divide separates

4200-486: The south by the inner Himalayan range , to the north by the Kunlun Mountains , which separate it from the Tarim Basin , and to the northeast by the Qilian Mountains , which separate the plateau from the Hexi Corridor and Gobi Desert . To the east and southeast the plateau gives way to the forested gorge and ridge geography of the mountainous headwaters of the Salween , Mekong , and Yangtze rivers in northwest Yunnan and western Sichuan (the Hengduan Mountains ). In

4270-692: The south. The Deosai Plains in Pakistan are situated at an average elevation of 4,114 meters (13,497 ft) above sea level. They are considered to be the second highest plateaus in the world. Other major plateaus in Asia are: Najd on the Arabian Peninsula , elevation 762 to 1,525 m (2,500 to 5,003 ft), Armenian Highlands (≈400,000 km (150,000 sq mi), elevation 900–2,100 metres (3,000–6,900 ft)), Iranian Plateau (≈3,700,000 km (1,400,000 sq mi), elevation 300–1,500 metres (980–4,920 ft)), Anatolian Plateau , Mongolian Plateau (≈2,600,000 km (1,000,000 sq mi), elevation 1,000–1,500 metres (3,300–4,900 ft)), and

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4340-511: The steppe have grasslands that can sustainably support populations of nomadic herdsmen, although frost occurs for six months of the year. Permafrost occurs over extensive parts of the plateau. Proceeding to the north and northwest, the plateau becomes progressively higher, colder, and drier, until reaching the remote Changtang region in the northwestern part of the plateau. Here the average altitude exceeds 5,000 metres (16,000 ft) and winter temperatures can drop to −40 °C (−40 °F). As

4410-416: The surrounding coastline through enormous glaciers . The polar ice cap is so massive that the echolocation measurements of ice thickness have shown that large areas are below sea level . But, as the ice melts, the land beneath will rebound through isostasy and ultimately rise above sea level. The largest and highest plateau in the world is the Tibetan Plateau , sometimes metaphorically described as

4480-618: The west are short ranges called the Danghe, Yema, Shule, and Tulai Nanshans. The easternmost range is the Qilian Mountains. The line of mountains continues east of the plateau as the Qinling , which separates the Ordos Plateau from Sichuan. North of the mountains runs the Gansu or Hexi Corridor which was the main silk-road route from China proper to the West. The plateau is a high-altitude arid steppe interspersed with mountain ranges and large brackish lakes. Annual precipitation ranges from 100 to 300 millimetres (3.9 to 11.8 in) and falls mainly as hail . The southern and eastern edges of

4550-436: The west, the curve of the rugged Karakoram range of northern Kashmir embraces the plateau. The Indus River originates in the western Tibetan Plateau in the vicinity of Lake Manasarovar . The Tibetan Plateau is bounded in the north by a broad escarpment where the altitude drops from around 5,000 metres (16,000 ft) to 1,500 metres (4,900 ft) over a horizontal distance of less than 150 kilometres (93 mi). Along

4620-399: The world's grassland by raising livestock rather than crops, which are unsuitable to the terrain. Archaeological evidence suggests that the earliest human occupation of the plateau occurred between 30,000 and 40,000 years ago. Since colonization of the Tibetan Plateau, Tibetan culture has adapted and flourished in the western, southern, and eastern regions of the plateau. The northern portion,

4690-448: The world's two highest summits, Mount Everest and K2 , the Tibetan Plateau is often referred to as "the Roof of the World ". The Tibetan Plateau contains the headwaters of the drainage basins of most of the streams and rivers in surrounding regions . This includes the three longest rivers in Asia (the Yellow , Yangtze , and Mekong ). Its tens of thousands of glaciers and other geographical and ecological features serve as

4760-467: The younger mountain ranges on the planet, consisting mostly of uplifted sedimentary and metamorphic rock . Their formation is a result of a continental collision or orogeny along the convergent boundary between the Indo-Australian Plate and the Eurasian Plate . The collision began in the Upper Cretaceous period about 70 million years ago, when the north-moving Indo-Australian Plate , moving at about 15 cm (6 in) per year, collided with

4830-446: Was enriching the Sanhu region with enormous reserves of lithium derived from hot springs near Mount Buka Daban which now feed into the Narin Gol River that flows into East Taijinar Lake . Around 30 kya , the lake in the Kunluns dried up and the Qarhan was cut off from sufficient inflows of fresh water. It became saline again, beginning to precipitate salts about 25,000 years ago. The basin's continuing formation and evolution

4900-467: Was once called Gallayat Plateaus, rising 3,300 ft above sea level. Another very large plateau is the icy Antarctic Plateau , which is sometimes referred to as the Polar Plateau or King Haakon VII Plateau, home to the geographic South Pole and the Amundsen–Scott South Pole Station , which covers most of East Antarctica where there are no known mountains but rather 3,000 m (9,800 ft) high of superficial ice and which spreads very slowly toward

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