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36-526: The Grand Banks of Newfoundland are a group of underwater plateaus south-east of Newfoundland on the North American continental shelf . These areas are relatively shallow, ranging from 15 to 91 metres (50 to 300 ft) in depth. The cold Labrador Current mixes with the warm waters of the Gulf Stream here, often causing extreme foggy conditions . The mixing of these waters and the shape of

72-510: A high plain or a tableland , is an area of a highland consisting of flat terrain that is raised sharply above the surrounding area on at least one side. Often one or more sides have deep hills or escarpments . 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. A few plateaus may have

108-496: A pin-shaped section at the west edge of the Grand Banks, with the 22 kilometres (12 nmi; 14 mi) radius head of the pin surrounding the islands and the needle heading south for 348 km (188 nmi; 216 mi). Canada is performing the hydrographic and geological surveys necessary for claiming the entire continental shelf off eastern Canada, as allowed by the terms of the latest United Nations Convention on

144-505: A rare Atlantic tsunami that struck the south coast of Newfoundland , claiming 29 lives on the Burin Peninsula . Technological advances in fishing (such as using large factory-ships and sonar ), as well as geopolitical disputes over territorial sea and exclusive economic zone (EEZ) boundaries, led to overfishing and a serious decline in the fish stocks of the Grand Banks from around 1990. The Canadian Grand Banks fishery

180-553: 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,

216-513: A small flat top while others have wider ones. 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 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

252-525: Is believed that rising sea levels submerged these around 8,000 years ago. While no archaeological evidence for a European presence near the Grand Banks survives from the period between the short-lived Greenland Norse settlement at L'Anse aux Meadows in 1000 CE and John Cabot 's transatlantic crossing in 1497, some evidence suggests that voyagers from the Basque Region and England (specifically from Bristol ) and others preceded Cabot. In

288-622: 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

324-710: 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

360-545: 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

396-572: 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,

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432-895: 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,

468-586: 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

504-539: The Grand Banks of Newfoundland . The 58,000-square-kilometre area may have served as an important refuge for marine species during the last ice age . The Flemish Cap lies outside Canada 's 200 nautical mile (370 km) Exclusive Economic Zone established in 1977, and is therefore in international fishing waters. Overfishing became a serious issue in the latter 20th & early 21st centuries. Cod are particularly threatened here, as are American plaice , and

540-408: 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. 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

576-567: 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

612-564: The 15th century some texts refer to a land called Bacalao , the land of the codfish, which is possibly Newfoundland. Within a few years of Cabot's voyage the existence of fishing grounds on the Grand Banks became generally known in Europe. Ships from France and Portugal pioneered fishing there, followed by vessels from Spain , while ships from England were scarce in the early years. This soon changed, especially after Bernard Drake 's Newfoundland Expedition in 1585 , which virtually wiped out

648-648: The 1990 film The Hunt for Red October . Herman Melville described passing through the Banks as a young sailor on his first voyage in his autobiographical novel Redburn: His First Voyage (1849), where he saw whales and a haunting shipwreck with weeks-dead sailors still on board. It is also featured in The Grey Seas Under , a non-fiction book by Canadian author Farley Mowat about the ocean-going maritime salvage tug Foundation Franklin . The Canadian patriotic song " Something to Sing About " opens with

684-688: 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 ,

720-652: The Law of the Sea (UNCLOS). Petroleum reserves have also been discovered and a number of oil fields are under development in this region, most notably the Hibernia , Terra Nova , and White Rose projects. However, the harsh environment on the Grand Banks also led to the Ocean Ranger disaster. The Northwest Atlantic Ocean is undergoing long-term warming from anthropogenic climate change . The surface water temperatures of

756-635: The Newfoundland Shelf have increased by 0.13 °C per decade from 1950 to 2016. Depth-averaged ocean temperatures (0–175 m) have not shown a warming trend during that same period. Semi-fictional depictions of fishermen working on the Grand Banks can be found in Rudyard Kipling 's novel Captains Courageous (1897) and in Sebastian Junger's non-fiction book The Perfect Storm (1997). The Grand Banks are also portrayed in

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792-721: 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

828-543: The Spanish and Portuguese fishing-industries in this area. The fish stocks became important for the early European-settler economies of eastern Canada and New England . On 18 November 1929, the 1929 Grand Banks earthquake struck the southwestern part of the Grand Banks bordering the Laurentian Channel , causing an underwater landslide which resulted in extensive damage to transatlantic cables and generated

864-549: The cap range from approximately 122 m (400 feet) to 700 m (2,300 feet). The Flemish Cap is located within an area of transition between the cold waters of the Labrador Current and warmer waters influenced by the Gulf Stream . The mixing of the warmer and colder waters over the plateau produces the characteristic clockwise circulation current over the cap. The waters of the Flemish Cap are deeper and warmer than

900-674: 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

936-492: 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

972-527: The largest lake in South America. [REDACTED] Media related to Plateaus at Wikimedia Commons Flemish Cap The Flemish Cap is an area of shallow waters in the north Atlantic Ocean centered roughly at 47° north, 45° west or about 563 km (350 miles) east of St. John's, Newfoundland and Labrador . The shallow water is caused by a wide underwater plateau covering an extended area of 42,000 km (12,000 square miles). Depths at

1008-483: The late 20th century caused the collapse of several species, particularly cod, leading to the closure of the Canadian Grand Banks fishery in 1992. Extensive glaciation took place in the area of the Grand Banks during the last glacial maximum . By approximately 13,000 years ago the majority of the ice had melted, leaving the Grand Banks exposed as several islands extending for hundreds of kilometres. It

1044-507: The line "I have walked 'cross the sand on the Grand Banks of Newfoundland." However, as the banks are underwater, it is impossible to walk across them in reality. 45°14′13″N 50°59′21.2″W  /  45.23694°N 50.989222°W  / 45.23694; -50.989222 Plateaus In geology and physical geography , a plateau ( / p l ə ˈ t oʊ , p l æ ˈ t oʊ , ˈ p l æ t oʊ / ; French: [plato] ; pl. : plateaus or plateaux ), also called

1080-601: 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

1116-590: The numbers of redfish have shown such significant decline as to be classified endangered. During the last decade of the 20th century & the beginning part of the 21st century, Canada made an effort to prevent overfishing in the region by use of provisions of the Coastal Fisheries Protection Act and the United Nations Fish Stocks Agreement. According to early written accounts dating back to 1607,

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1152-450: The ocean bottom lifts nutrients to the surface. These conditions helped to create one of the richest fishing grounds in the world. Fish species include Atlantic cod , swordfish , haddock and capelin ; shellfish include scallop and lobster . The area also supports large colonies of seabirds such as northern gannets , shearwaters and sea ducks and various sea mammals such as seals , dolphins and whales . Overfishing in

1188-866: 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

1224-480: 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

1260-676: Was closed in 1993. Canada 's EEZ currently covers the majority of the Grand Banks except for the lucrative "nose" (eastern extremity, near the Flemish Cap ) and "tail" (southern extremity) of the fishing bank . The 1783 Treaty of Paris gave the United States shared rights to fish in these waters, but that section of the Treaty is no longer in force. The exclusive economic zone of the French territory Saint Pierre and Miquelon occupies

1296-605: 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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