Slot canyon
Encyclopedia
Canyon
A canyon or gorge is a deep ravine between cliffs often carved from the landscape by a river. Rivers have a natural tendency to reach a baseline elevation, which is the same elevation as the body of water it will eventually drain into. This forms a canyon. Most canyons were formed by a process of...
, formed by the wear of water rushing through rock. A slot canyon is significantly deeper than it is wide. Some slot canyons can measure less than one metre (3 ft) across at the top but drop more than 30 m (100 ft) to the floor of the canyon.
Most slot canyons are formed in sandstone
Sandstone
Sandstone is a sedimentary rock composed mainly of sand-sized minerals or rock grains.Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand, sandstone may be any colour, but the most common colours are tan, brown, yellow,...
and limestone
Limestone
Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate . Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera....
rock, although slot canyons in other rock types such as granite
Granite
Granite is a common and widely occurring type of intrusive, felsic, igneous rock. Granite usually has a medium- to coarse-grained texture. Occasionally some individual crystals are larger than the groundmass, in which case the texture is known as porphyritic. A granitic rock with a porphyritic...
and basalt
Basalt
Basalt is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or grey...
are possible. Even in sandstone and limestone, only a very small number of creek
Stream
A stream is a body of water with a current, confined within a bed and stream banks. Depending on its locale or certain characteristics, a stream may be referred to as a branch, brook, beck, burn, creek, "crick", gill , kill, lick, rill, river, syke, bayou, rivulet, streamage, wash, run or...
s will form slot canyons. This is due to a combination of the particular characteristics of the rock, and regional rainfall.
Slot canyons around the world
Slot canyons are found in many parts of the world, predominantly in areas with low rainfall. Some of the most well known slot canyons are to be found in the Southwestern United StatesSouthwestern United States
The Southwestern United States is a region defined in different ways by different sources. Broad definitions include nearly a quarter of the United States, including Arizona, California, Colorado, Nevada, New Mexico, Oklahoma, Texas and Utah...
. Other significant areas include the Sierra de Guara
Sierra de Guara
The Sierra de Guara is a mountain massif in the province of Huesca, the most northerly province in the autonomous community of Aragon, Spain. Its highest point is Tozal de Guara .It lies around 25km northeast of the city of Huesca itself...
in northern Spain
Spain
Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...
, the Pyrenees
Pyrenees
The Pyrenees is a range of mountains in southwest Europe that forms a natural border between France and Spain...
on the border of France
France
The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...
and Spain, and the Blue Mountains in New South Wales
New South Wales
New South Wales is a state of :Australia, located in the east of the country. It is bordered by Queensland, Victoria and South Australia to the north, south and west respectively. To the east, the state is bordered by the Tasman Sea, which forms part of the Pacific Ocean. New South Wales...
, Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
.
Australia
The largest known area of slot canyons in Australia is in the Blue Mountains, west of SydneySydney
Sydney is the most populous city in Australia and the state capital of New South Wales. Sydney is located on Australia's south-east coast of the Tasman Sea. As of June 2010, the greater metropolitan area had an approximate population of 4.6 million people...
. They occur in a narrow band of sandstone that runs roughly 30 km (19 mi) from east to west, and about 100 km (62 mi) from south to north. The majority of these canyons are in the Wollemi Wilderness
Wollemi National Park
Wollemi National Park is the second largest national park in New South Wales, and contains most of the largest wilderness area, the Wollemi Wilderness...
, and are difficult to access. A small number are regularly visited by canyoners on weekends in summer. The Grand Canyon, near Blackheath, has a tourist track along its rim, but requires abseiling
Abseiling
Abseiling , rappelling in American English, is the controlled descent down a rock face using a rope; climbers use this technique when a cliff or slope is too steep and/or dangerous to descend without protection.- Slang terms :...
(rappelling) or swimming to visit fully.
Sandstone slot canyons can also be found in a few more remote parts of Australia, including:
- the Bungle Bungles in Purnululu National ParkPurnululu National ParkPurnululu National Park is a national park in the Kimberley region of Western Australia. It was declared a World Heritage Site in 2003.-Location:...
, Western AustraliaWestern AustraliaWestern Australia is a state of Australia, occupying the entire western third of the Australian continent. It is bounded by the Indian Ocean to the north and west, the Great Australian Bight and Indian Ocean to the south, the Northern Territory to the north-east and South Australia to the south-east... - Karijini National ParkKarijini National ParkKarijini National Park is a National Park centred in the Hamersley Ranges of the Pilbara region in northwestern Western Australia . It is just north of the Tropic of Capricorn, approximately 1055 km from the State's capital city, Perth...
in Western Australia - Carnarvon GorgeCarnarvon GorgeCarnarvon Gorge is located in the Southern Brigalow Belt bioregion in Central Queensland , 593 km northwest of Brisbane. Primarily created by water erosion, Carnarvon Gorge is around 30 kilometres long, and six hundred metres deep at the mouth...
in QueenslandQueenslandQueensland is a state of Australia, occupying the north-eastern section of the mainland continent. It is bordered by the Northern Territory, South Australia and New South Wales to the west, south-west and south respectively. To the east, Queensland is bordered by the Coral Sea and Pacific Ocean...
Jordan
The SiqSiq
al-Siq is the main entrance to the ancient city of Petra in southern Jordan. The dim, narrow gorge winds its way approximately one mile and ends at Petra's most elaborate ruin, Al Khazneh .The Siq is a natural geological fault produced by tectonic forces and worn smooth by water erosion...
in Petra
Petra
Petra is a historical and archaeological city in the Jordanian governorate of Ma'an that is famous for its rock cut architecture and water conduits system. Established sometime around the 6th century BC as the capital city of the Nabataeans, it is a symbol of Jordan as well as its most visited...
, Jordan
Jordan
Jordan , officially the Hashemite Kingdom of Jordan , Al-Mamlaka al-Urduniyya al-Hashemiyya) is a kingdom on the East Bank of the River Jordan. The country borders Saudi Arabia to the east and south-east, Iraq to the north-east, Syria to the north and the West Bank and Israel to the west, sharing...
is a famous slot canyon. It was a location in the film Indiana Jones and the Last Crusade
Indiana Jones and the Last Crusade
Indiana Jones and the Last Crusade is a 1989 American adventure film directed by Steven Spielberg, from a story co-written by executive producer George Lucas. It is the third film in the Indiana Jones franchise. Harrison Ford reprises the title role and Sean Connery plays Indiana's father, Henry...
.
United States
The U.S. stateU.S. state
A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...
of Utah
Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...
has the largest concentration of slot canyons in the world. Utah
Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...
slot canyons are found places such as Zion National Park
Zion National Park
Zion National Park is located in the Southwestern United States, near Springdale, Utah. A prominent feature of the park is Zion Canyon, which is 15 miles long and up to half a mile deep, cut through the reddish and tan-colored Navajo Sandstone by the North Fork of the Virgin River...
, Bryce Canyon National Park
Bryce Canyon National Park
Bryce Canyon National Park is a national park located in southwestern Utah in the United States. The major feature of the park is Bryce Canyon which, despite its name, is not a canyon but a giant natural amphitheater created by erosion along the eastern side of the Paunsaugunt Plateau...
, and Grand Staircase-Escalante National Monument
Grand Staircase-Escalante National Monument
The Grand Staircase-Escalante National Monument contains 1.9 million acres of land in southern Utah, the United States. There are three main regions: the Grand Staircase, the Kaiparowits Plateau, and the Canyons of the Escalante. President Bill Clinton designated the area as a U.S. National...
. Slot canyons of Utah include Buckskin Gulch
Buckskin Gulch
The Buckskin Gulch, a canyon in southern Utah, is one of the main tributaries of the Paria River, which is itself a minor tributary of the Colorado River. It is the longest and deepest slot canyon in the southwest United States and may very well be the longest in the world...
, the longest slot canyon in the world, and The Narrows (Zion National Park)
The Narrows (Zion National Park)
The Narrows in Zion National Park, is a section of canyon on the North Fork of the Virgin River. The hike of The Narrows is one of the premier hikes on the Colorado Plateau...
. Northern Arizona also has a high concentration of slot canyons including Antelope Canyon
Antelope Canyon
Antelope Canyon is the most-visited and most-photographed slot canyon in the American Southwest. It is located on Navajo land near Page, Arizona...
and Secret Canyon, two of the most famous slot canyons located near Page
Page, Arizona
Page is a city in Coconino County, Arizona, United States, near the Glen Canyon Dam and Lake Powell. According to 2005 Census Bureau estimates, the population of the city is 6,794.-Geography:Page is located at ....
, on the Navajo
Navajo Nation
The Navajo Nation is a semi-autonomous Native American-governed territory covering , occupying all of northeastern Arizona, the southeastern portion of Utah, and northwestern New Mexico...
Nation. There are also numerous slot canyons in the valley between US Route 89 and the Vermilion Cliffs
Vermilion Cliffs
The Vermilion Cliffs are the second "step" up in the five-step Grand Staircase of the Colorado Plateau. Reddish or vermilion-colored cliffs are found along U.S. Highway 89 and U.S. Highway 89A near Kanab, Utah . They extend from a location near Page, Arizona, west for a considerable distance, in...
in Arizona, and can be seen as one descends into the valley on US 89, but these are also on the Navajo reservation and are closed to the public. Several canyons accessible to the public are within Zion National Park
Zion National Park
Zion National Park is located in the Southwestern United States, near Springdale, Utah. A prominent feature of the park is Zion Canyon, which is 15 miles long and up to half a mile deep, cut through the reddish and tan-colored Navajo Sandstone by the North Fork of the Virgin River...
and Death Valley National Park
Death Valley National Park
Death Valley National Park is a national park in the U.S. states of California and Nevada located east of the Sierra Nevada in the arid Great Basin of the United States. The park protects the northwest corner of the Mojave Desert and contains a diverse desert environment of salt-flats, sand dunes,...
.