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Everything about Gorge totally explained » For the song, see CANYON.MID. For the band, see Canyon (band).
A canyon (rarely cañon) or gorge is a deep valley between cliffs often carved from the landscape by a river. Most canyons were formed by a process of long-time erosion from a plateau level. The cliffs form because harder rock strata that are resistant to erosion and weathering remain exposed on the valley walls. Canyons are much more common in arid areas than in wetter areas because weathering has a greater effect in arid zones. Canyon walls are often formed of resistant sandstones or granite. Submarine canyons are those which form underwater, generally at the mouths of rivers. The word canyon is Spanish in origin ( cañón). The word canyon is generally used in the United States, while the word gorge is more common in Europe and Oceania, though it's also used in some parts of the United States and Canada. The military derived word defile is occasionally used in England.
A famous example is the Grand Canyon in
Arizona. In the southwestern United States, canyons are important archeologically because of the many cliff-dwellings built there, largely by the earlier inhabitants, Ancient Pueblo Peoples.
Sometimes large rivers run through canyons as the result of gradual geologic uplift. These are called entrenched rivers, because they're unable to easily alter their course. The Colorado River and the Snake River in the northwestern United States are two examples of tectonic uplift.
Canyons often form in areas of limestone rock. Limestone is to a certain extent soluble, so cave systems form in the rock. When these collapse a canyon is left, for example in the Mendip Hills in Somerset and Yorkshire Dales in Yorkshire, England.
Largest canyons
The definition of "largest canyon" is rather imprecise, as a canyon can be "large" by its depth, length, or the total area of the canyon system. Also the inaccessibility of the major canyons in the Himalaya contributes to their not being regarded as candidates for the biggest canyon. The definition of "deepest canyon" is similarly imprecise, especially if one includes mountain canyons as well as canyons cut through relatively flat plateaus (which have a somewhat well-defined rim elevation).
The Yarlung Tsangpo Canyon, along the Yarlung Tsangpo River in Tibet, China, is regarded by some as the deepest canyon in the world, and is even slightly longer than Grand Canyon. Hence it's regarded by many as the world's largest canyon, followed by the Kali Gandaki Gorge in Nepal, Polung Tsangpo Canyon in Tibet, Cotahuasi Canyon (3,535 m deep and the deepest in the Americas), and the Tekezé gorge (2000m+ deep and deepest in Africa).
Slot canyons are very narrow canyons, often with smooth walls.
Other well-known canyons
Avon Gorge in Bristol, England
Blyde River Canyon in Mpumalanga, South Africa
Black Canyon of the Gunnison, Colorado, USA
Canyon Fortaleza in Cambará do Sul, Brazil
Canhão da Nazaré, Portugal
Canyon Guartelá in Tibagi, Brazil
Sumidero Canyon in Chiapas, Mexico
Cataract Gorge in Launceston, Australia
Cheddar Gorge in Somerset, England
Colca Canyon along the Colca River in Arequipa, Peru one of the deepest canyons in the world with 3269 meters.
Columbia River Gorge in the Pacific Northwest of America.
Cotahuasi Canyon along the Cotahuasi River in Arequipa, Peru, the deepest canyon in the world with 3535 meters.
Fish River Canyon in Namibia
Glen Nevis in Lochaber, Scotland
Grand Canyon of Pennsylvania located in the Tioga State Forest in Pennsylvania, USA
Grand Canyon of the Yellowstone located within Yellowstone National Park in Wyoming, USA
Grand Canyon du Verdon in Provence, France
Gorges d'Ardèche, in France
Gorges du Tarn in France
Hells Canyon in Idaho and Oregon, USA
Ironbridge Gorge in Shropshire, England
Iron Gate located in the Đerdap national park in Serbia
Itaimbezinho in Cambará do Sul, Brazil
Kloof Gorge in Kloof, South Africa
Komati Gorge, South Africa
Lanner Gorge, South Africa
Malacara in Praia Grande, Brazil
Nine Mile Canyon in eastern Utah, USA
Palo Duro Canyon in Texas, USA
Pankisi Gorge in Georgia (country)
Red River Gorge in Kentucky, USA
Royal Gorge in Colorado, USA
Samaria Gorge in Crete, Greece
São Francisco River Canyon, Brazil
Tara River Canyon in Montenegro
Taroko Gorge in Taiwan
Three Gorges in China
Kings Canyon in California, USA
Vikos Gorge in Greece
Other lesser-known canyon systems include:
Black Dragon Canyon in Utah, USA
Manawatu Gorge in Manawatu, North Island New Zealand
Swaan River makes many gorges in Pothohar plateau Pakistan.
Four canyons in the Nahanni, Canada, the largest being 19km long and 1.2km deep.(External Link )
The Blue Mountains west of Sydney in New South Wales, Australia contain many
Canyons on other planetary bodies
Valles Marineris on Mars is the largest known canyon in the solar system
Ithaca Chasma on Saturn's moon Tethys
Venus has many craters and canyons on its surface. The troughs on the planet are part of a system of canyons that's more than 6 400 km long.
Further Information
Get more info on 'Gorge'.
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