The Info List - Plateau

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In geology and physical geography a plateau ( /pləˈtoʊ/, /plæˈtoʊ/ or /ˈplætoʊ/; plural plateaus or plateaux[1][2]),is also called a high plain or a tableland, it is an area of a highland, usually consisting of relatively flat terrain that is raised significantly above the surrounding area, often with one or more sides with steep slopes. Plateaus can be formed by a number of processes, including upwelling of volcanic magma, extrusion of lava, and erosion by water and glaciers. Plateaus are classified according to their surrounding environment as intermontane, Piedmont, or continental.


1 Formation

1.1 Volcanic 1.2 Erosive

2 Classification 3 Large plateaus

3.1 Asia 3.2 Antarctica 3.3 North America 3.4 South America 3.5 Africa 3.6 Oceania

4 See also 5 References 6 External links

Formation[edit] Plateaus can be formed by a number of processes, including upwelling of volcanic magma, extrusion of lava, and erosion by water and glaciers. Volcanic[edit] Main article: volcanic plateau Volcanic
plateaus are produced by volcanic activity. The Columbia Plateau
in the northwestern United States
United States
is an example. They may be formed by upwelling of volcanic magma or extrusion of lava.

The Pajarito Plateau
Pajarito Plateau
in New Mexico
New Mexico
is an example of a volcanic plateau.

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 the crust. Erosive[edit] 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. Computer modeling studies suggest that high plateaus may also be partially a result from the feedback between tectonic deformation and dry climatic conditions created at the lee side of growing orogens.[3] Classification[edit] Plateaux are classified according to their surrounding environment.

Intermontane plateaus are the highest in the world, bordered by mountains. The Tibetan Plateau
Tibetan Plateau
is one such plateau. Piedmont plateaus are bordered on one side by mountains and on the other by a plain or a sea. The Piedmont Plateau
Piedmont Plateau
of the Eastern United States between the Appalachian Mountains
Appalachian Mountains
and the Atlantic Coastal Plain
is an example. Continental plateaus are bordered on all sides by plains or oceans, forming away from the mountains. An example of a continental plateau is the Antarctic Plateau
Antarctic Plateau
or Polar Plateau
Polar Plateau
in East Antarctica.

Large plateaus[edit] Asia[edit] The largest and highest plateau in the world is the Tibetan Plateau, sometimes metaphorically described as 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 km2 (970,000 sq mi), at about 5,000 m (16,000 ft) above sea level. The plateau is sufficiently high enough to reverse the Hadley cell
Hadley cell
convection cycles and to drive the monsoons of India
towards the south. The second-highest plateau is the Deosai Plateau
of the Deosai National Park (also known as Deoasai Plains) at an average elevation of 4,114 m (13,497 ft). It is located in the Astore and Skardu districts of Gilgit-Baltistan, in northern Pakistan. Deosai means 'the land of giants'. The park protects an area of 3,000 km2 (1,200 sq mi). It is known for its rich flora and fauna of the Karakoram-West Tibetan Plateau
Tibetan Plateau
alpine steppe ecoregion. In spring it is covered by sweeps of wildflowers and a wide variety of butterflies. The highest point in Deosai is Deosai Lake, or Sheosar Lake
from the Shina language meaning "Blind lake" (Sheo – Blind, Sar – lake) near the Chilim Valley. The lake lies at an elevation of 4,142 m (13,589 ft), one of the highest lakes in the world, and is 2.3 km (1.4 mi) long, 1.8 km (1.1 mi) wide, and 40 m (130 ft) deep on average.

Hardangervidda, the largest plateau in Europe

Bogotá, Colombia
is located in a high plateau, over 8,600 ft (2,600 m) high

Some other major plateaus in Asia are: Najd
in the Arabian Peninsula elevation 762 to 1,525 m (2,500 to 5,003 ft), Armenian Highlands (~400,000 km2 (150,000 sq mi), elevation 900–2,100 metres (3,000–6,900 ft)), Iranian plateau
Iranian plateau
(~3,700,000 km2 (1,400,000 sq mi), elevation 300–1,500 metres (980–4,920 ft)), Anatolian Plateau, Mongolian Plateau (~2,600,000 km2 (1,000,000 sq mi), elevation 1,000–1,500 metres (3,300–4,900 ft)), and the Deccan Plateau (~1,900,000 km2 (730,000 sq mi), elevation 300–600 metres (980–1,970 ft)). Antarctica[edit] Another very large plateau is the icy Antarctic Plateau, which is sometimes referred to as the Polar Plateau, home to the geographic South Pole
South Pole
and the Amundsen-Scott South Pole
South Pole
Station, which covers most of East Antarctica
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 the surrounding coastline through enormous glaciers. This polar ice cap is so massive that the echolocation sound measurements of ice thickness have shown that large parts of the Antarctic "dry land" surface have been pressed below sea level. Thus, if that same ice cap were suddenly removed, the large areas of the frozen white continent would be flooded by the surrounding Antarctic Ocean or Southern Ocean. On the other hand, were the ice cap melts away too gradually, the surface of the land beneath it would gradually rebound away through isostasy from the center of the Earth
and that same land would ultimately rise above sea level. North America[edit] A large plateau in North America
North America
is the Colorado
Plateau, which covers about 337,000 km2 (130,000 sq mi) in Colorado, Utah, Arizona
and New Mexico.[4] In northern Arizona
and southern Utah
the Colorado Plateau
Colorado Plateau
is bisected by the Colorado
and the Grand Canyon. How this came to be is that over 10 million years ago, 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
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
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, the North Rim of the Grand Canyon
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
is about 1,830 m (6,000 ft) below the level of the North Rim. Another high altitude plateau in North America
North America
is the Mexican Plateau. With an area of 601,882 km2 (232,388 sq mi) and average height of 1,825 m, it is the home of more than 70 million people. South America[edit] Main article: Tepui A tepui ( /ˈtɛpwi/), or tepuy (Spanish: [teˈpui]), is a table-top mountain or mesa found in the Guiana Highlands
Guiana Highlands
of South America, especially in Venezuela
and western Guyana. The word tepui means "house of 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 the jungle, giving rise to spectacular natural scenery. Auyantepui
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
Altiplano Cundiboyacense
roughly the size of Switzerland. Averaging a height of 2,600 metres above sea level, this northern Andean plateau is situated in the country's eastern range and is divided into three main flat regions; the Bogotá
savanna, the valleys of Ubaté
and Chiquinquirá, and the valleys of Duitama
and Sogamoso.

to the ALMA’s Operations Support Facility and then on further to the Chajnantor
at 5000 meters above sea level.[5]

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 the Altiplano
lies within Bolivian and Peruvian territory while its southern parts lie in Chile and Argentina. The Altiplano
plateau hosts several cities like Puno, Oruro, Potosí, Cuzco 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, the largest lake in South America. Africa[edit] The highest African plateau is the Ethiopian Highlands
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 1500 m (4,921 ft), while the summits reach heights of up to 4550 m (14,928 ft). It 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 1500 m, but below 2100 m, thus excluding the Lesotho mountain regions. It is home to some of largest South-African urban agglomerations. Oceania[edit] 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 of between 305 and 460 m. The North Island
North Island
is an area of high land occupying much of the centre of the North Island
North Island
of New Zealand, with volcanoes, lava plateaus, and crater lakes, the most notable of which is the country's largest lake, Lake
Taupo. The plateau stretches approximately 100 km east to west and 130 km north to south. The majority of the plateau is more than 600 m above sea level. See also[edit]

Atherton Tableland Butte Chapada Deosai National Park Mesa Oceanic plateau
Oceanic plateau
for submarine or undersea plateaux Potrero Tepuis Tuya


^ "Definition of plateau". American English Dictionary. Merriam-Webster. Retrieved 26 August 2017.  ^ "Definition of plateau". Cambridge English Dictionary. Cambridge University Press. Retrieved 26 August 2017.  ^ Garcia-Castellanos, D., 2007. The role of climate during high plateau formation. Insights from numerical experiments. Earth
Planet. Sci. Lett. 257, 372-390, doi:10.1016/j.epsl.2007.02.039 pdf ^ Leighty, Dr. Robert D. (2001). " Colorado Plateau
Colorado Plateau
Physiographic Province". Contract Report. Defense Advanced Research Projects Agency (DOD) Information Sciences Office. Archived from the original on 2004-09-26. Retrieved 2007-12-25.  ^ "The Road
to the Stars". Retrieved 27 July 2015. 

External links[edit]

Wikimedia Commons has media related to Plateaus.

has the text of the 1911 Encyclopædia Britannica article Plateau.

"Plateau" at scienceclarified.com nationalgeographic.com travel-university.org[permanent dead link] edu.pe.ca britannica.com

v t e

Earth's landforms

List of landforms




Flat Hill Mountain Mountain
range Plateau Ridge Valley

Continental plain

Ice sheet Plain Steppe Tundra


Alluvial fan Beach Canyon Cave Channel Cliff Floodplain Lake Levee Meander Oasis Pond Rapids River River
delta River
mouth River
valley Strait Swamp Waterfall


Arête Cirque Esker Fjord Glacier Tunnel

Oceanic and coastal landforms

Atoll Bay Cape Channel Coast Continental shelf Coral reef Estuary High island Island Isthmus Lagoon Mid-ocean ridge Oceanic trench Peninsula Seamount


Caldera Crater lake Geyser High island Mid-ocean ridge Lava
dome Lava
field Lava
plateau Submarine volcano


crater Volcanic
plug Volcano Wall rock


Desert Dry lake Dune Sandhill Tundra


Artificial island Artificial reef Bridge Building Canal
(man-made) Dam Ditch Land reclamation Levee Polder Quarry Reservoir Road Tunnel

See also: Ge