AskDefine | Define everest

Dictionary Definition

Everest n : a mountain in the central Himalayas on the border of Tibet and Nepal; the highest mountain peak in the world (29,028 feet high) [syn: Mount Everest, Mt. Everest]

User Contributed Dictionary

English

Proper noun

  1. Mount Everest

Synonyms

Extensive Definition

Mount Everest, also called Chomolungma, Qomolangma or Zhumulangma (in , in Chinese: 珠穆朗玛峰 Zhūmùlǎngmǎ Fēng) or Sagarmatha ( meaning Ocean Head) is the highest mountain on Earth, as measured by the height of its summit above sea level, which is 8,848 metres (29,029 feet). The mountain, which is part of the Himalaya range in High Asia, is located on the border between Sagarmatha Zone, Nepal, and Tibet, China.
In 1856, the Great Trigonometric Survey of India established the first published height of Everest at , although at the time Everest was known as Peak XV. In 1865, Everest was given its official English name by the Royal Geographical Society upon recommendation of Andrew Waugh, the British Surveyor General of India at the time. Waugh was unable to propose an established local name due to Nepal and Tibet being closed to foreigners at the time, although Chomolungma had been in common use by Tibetans for centuries.
The highest mountain in the world attracts climbers of all levels, from well experienced mountaineers to novice climbers willing to pay substantial sums to professional mountain guides to complete a successful climb. The mountain, while not posing substantial technical climbing difficulty on the standard route (other eight-thousanders such as K2 or Nanga Parbat are much more difficult), still has many inherent dangers such as altitude sickness, weather and wind. By the end of the 2007 climbing season, there had been 3,679 ascents to the summit by 2,436 individuals. This means climbers are a significant source of tourist revenue for Nepal, whose government also requires all prospective climbers to obtain an expensive permit, costing up to US$25,000 per person. Everest has claimed 210 lives, including 15 who perished during a 1996 storm high on the mountain. Conditions are so difficult in the death zone that most corpses have been left where they fell, some of which are visible from standard climbing routes.

Discovery of the highest mountain

In 1808, the British began the Great Trigonometric Survey of India to determine the location and names of the world's highest mountains. Starting in southern India, the survey teams gradually moved northward using giant 1100 pound (500 kg) theodolites (each requiring 12 men to carry) to measure heights as accurately as possible. They reached the Himalayan foothills by the 1830s, but Nepal was unwilling to allow the British to enter the country due to suspicions of political aggression and possible annexation. Several requests by the surveyors to enter Nepal were turned down.
The British were forced to continue their observations from Terai, a region south of Nepal which is parallel to the Himalayas. Conditions in Terai were difficult due to torrential rains and malaria — three survey officers died from malaria while two others had to retire due to failing health.
Nonetheless, in 1847, the British pressed on and began detailed observations of the Himalayan peaks from observation stations up to away. Weather restricted work to the last three months of the year. In November 1847, Andrew Waugh, the British Surveyor General of India made a number of observations from Sawajpore station located in the eastern end of the Himalayas. At the time, Kangchenjunga was considered the highest peak in the world, and with interest he noted a peak beyond it, some away. John Armstrong, one of Waugh's officials, also saw the peak from a location further west and called it peak 'b'. Waugh would later write that the observations indicated that peak 'b' was higher than Kangchenjunga, but due to the great distance of the observations, closer observations were required for verification. The following year, Waugh sent a survey official back to Terai to make closer observations of peak 'b', but clouds thwarted all attempts.
In 1849, Waugh dispatched James Nicolson to the area. Nicolson was able to make two observations from Jirol, away. Nicolson then took the largest theodolite and headed east, obtaining over 30 observations from five different locations, with the closest being away from the peak.
Unknown to Nicolson, he had just completed the observations that would establish peak 'b' as the highest peak on Earth. Nicolson retreated to Patna on the Ganges to perform the necessary calculations based on his observations. His raw data gave an average height of for peak 'b', but this did not take into account light refraction which distorts heights. The number clearly indicated, however, that peak 'b' was higher than Kangchenjunga. Unfortunately, Nicolson came down with malaria and was forced to return home, calculations unfinished. Michael Hennessy, one of Waugh's assistants, had begun designating peaks based on Roman Numerals, with Kangchenjunga named Peak IX, while peak 'b' now became known as Peak XV. An official announcement that Peak XV was the highest was delayed for several years as the calculations were repeatedly verified. Waugh began work on Nicolson's data in 1854, and along with his staff spent almost two years working on the calculations, having to deal with the problems of light refraction, barometric pressure, and temperature over the vast distances of the observations. Finally, in March 1856 he announced his findings in a letter to his deputy in Calcutta. Kangchenjunga was declared to be , while Peak XV was given the height of . Waugh concluded that Peak XV was "most probably the highest in the world".
With the height now established, what to name the peak was clearly the next challenge. While the survey was anxious to preserve local names if possible (e.g., Kangchenjunga and Dhaulagiri were local names), Waugh argued that he was unable to find any commonly used local name. Waugh's search for a local name was hampered by Nepal and Tibet being closed to foreigners at the time. Many local names existed, with perhaps the best known in Tibet for several centuries being Chomolungma, which had appeared on a 1733 map published in Paris by the French geographer D'Anville. However, Waugh argued that with the plethora of local names, it would be difficult to favour one specific name over all others. So, he decided that Peak XV should be named after George Everest, his predecessor as Surveyor General of India.
George Everest opposed the name suggested by Waugh and told the Royal Geographical Society in 1857 that Everest could not be written in Hindi nor pronounced by "the native of India". Waugh's proposed name prevailed despite the objections, and in 1865, the Royal Geographical Society officially adopted Mount Everest as the name for the highest mountain in the world.
In the 1960s, the Government of Nepal gave the mountain the official Nepali name of Sagarmatha (सगरमाथा), meaning "Goddess of the Sky".
In 1865, the mountain was officially given its English name by the Royal Geographical Society after being proposed by Andrew Waugh, the British Surveyor General of India. is in fact different from Sir George's own pronunciation of his surname, which was /ˈiːvrɪst/.
In the late 19th century, many European cartographers incorrectly believed that a native name for the mountain was "Gaurisankar". This was a result of confusion of Mount Everest with the actual Gauri Sankar, which, when viewed from Kathmandu, stands almost directly in front of Everest.
In the early 1960s, the Nepalese government gave Mount Everest the official name Sagarmatha (सगरमाथा). This name had not previously been used; the local inhabitants knew the mountain as Chomolungma. The mountain was not known and named in ethnic Nepal (that is, the Kathmandu valley and surrounding areas). The government set out to find a Nepalese name for the mountain because the Sherpa/Tibetan name Chomolangma was not acceptable, as it would have been against the idea of unification (Nepalization) of the country.
In 2002, the Chinese People's Daily newspaper published an article making a case against the continued use of the English name for the mountain in the Western world, insisting that it should be referred to by its Tibetan name. The newspaper argued that the Chinese (in nature a Tibetan) name preceded the English one, as Mount Qomolangma was marked on a Chinese map more than 280 years ago.

Measurement

In 1856, Andrew Waugh announced Everest (then known as Peak XV) as high, after several years of calculations based on observations made by the Great Trigonometric Survey.
More recently, the mountain has been found to be high, although there is some variation in the measurements. On 22 May 2005, the People's Republic of China's Everest Expedition Team ascended to the top of the mountain. On 9 October 2005, after several months of measurement and calculation, the PRC's State Bureau of Surveying and Mapping officially announced the height of Everest as 8,844.43 m ± 0.21 m (29,017.16 ± 0.69 ft). They claimed it was the most accurate and precise measurement to date. This height is based on the actual highest point of rock and not on the snow and ice covering it. The Chinese team also measured a snow/ice depth of 3.5 m, which is in agreement with a net elevation of 8,848 m. The snow and ice thickness varies over time, making a definitive height of the snow cap impossible to determine.
The elevation of was first determined by an Indian survey in 1955, made closer to the mountain, also using theodolites. It was subsequently reaffirmed by a 1975 Chinese measurement. In both cases the snow cap, not the rock head, was measured. In May 1999 an American Everest Expedition, directed by Bradford Washburn, anchored a GPS unit into the highest bedrock. A rock head elevation of 8,850 m (29,035 ft), and a snow/ice elevation 1 m (3 ft) higher, were obtained via this device. Although it has not been officially recognized by Nepal, this figure is widely quoted. Geoid uncertainty casts doubt upon the accuracy claimed by both the 1999 and 2005 surveys.
A detailed photogrammetric map (at a scale of 1:50,000) of the Khumbu region, including the south side of Mount Everest, was made by Erwin Schneider as part of the 1955 International Himalayan Expedition, which also attempted Lhotse. An even more detailed topographic map of the Everest area was made in the late 1980s under the direction of Bradford Washburn, using extensive aerial photography. suggest the rates of change are per year (upwards) and 3-6 mm (0.12-0.25 in) per year (northeastwards), but another account mentions more lateral movement (), and even shrinkage has been suggested.
The Mount Everest region, and the Himalayas in general, are thought to be experiencing ice-melt due to global warming.

Comparisons

Everest is the mountain whose summit attains the greatest distance above sea level. Several other mountains are sometimes claimed as alternative "tallest mountains on Earth". Mauna Kea in Hawaii is tallest when measured from its base; it rises over when measured from its base on the mid-ocean floor, but only attains above sea level.
By the same measure of base By comparison, reasonable base elevations for Everest range from on the south side to on the Tibetan Plateau, yielding a height above base in the range of 3,650 m (12,000 ft) to 4,650 m (15,300 ft).
The summit of Chimborazo in Ecuador is farther from the Earth's centre (6,384.4 km or 3,967.1 mi) than that of Everest (6,382.3 km or 3,965.8 mi), because the Earth bulges at the Equator. However, Chimborazo attains a height of only above sea level, and by this criterion it is not even the highest peak of the Andes.
Measured from sea level, the mountain K2 is ranked second in height with high.
The deepest spot in the ocean is deeper than Everest is high: the Challenger Deep off the Mariana Islands, is so deep that if Everest could be placed into it there would be more than 2 km (more than 1.3 mi) of water covering it.

Climbing routes

rect 58 14 160 49 Chomo Lonzo rect 200 28 335 52 Makalu rect 378 24 566 45 Mount Everest rect 188 581 920 656 Tibetan Plateau rect 250 406 340 427 Rong River rect 333 149 409 186 Changtse rect 550 284 677 303 Rongbuk Glacier rect 478 196 570 218 North Face rect 237 231 346 267 East Rongbuk Glacier rect 314 290 536 309 North Col north ridge route rect 531 79 663 105 Lhotse rect 582 112 711 130 Nuptse rect 603 232 733 254 South Col route rect 716 165 839 206 Gyachung Kang rect 882 147 967 183 Cho Oyu rect 1 1 999 661 desc bottom-left
Mt. Everest has two main climbing routes, the southeast ridge from Nepal and the northeast ridge from Tibet, as well as many other less frequently climbed routes. Of the two main routes, the southeast ridge is technically easier and is the more frequently-used route. It was the route used by Edmund Hillary and Tenzing Norgay in 1953 and the first recognised of fifteen routes to the top by 1996.
Most attempts are made during May before the summer monsoon season. As the monsoon season approaches, a change in the jet stream at this time pushes it northward, thereby reducing the average wind speeds high on the mountain. While attempts are sometimes made after the monsoons in September and October, when the jet stream is again temporarily pushed northward, the additional snow deposited by the monsoons and the less stable weather patterns (tail end of the monsoon) makes climbing more difficult.

Southeast ridge

The ascent via the southeast ridge begins with a trek to Base Camp at on the south side of Everest in Nepal. Expeditions usually fly into Lukla (2,860 m) from Kathmandu and pass through Namche Bazaar. Climbers then hike to Base Camp, which usually takes six to eight days, allowing for proper altitude acclimatization in order to prevent altitude sickness. Climbing equipment and supplies are carried by yaks, dzopkyos (yak hybrids) and human porters to Base Camp on the Khumbu Glacier. When Hillary and Tenzing climbed Everest in 1953, they started from Kathmandu Valley, as there were no roads further east at that time.
Climbers will spend a couple of weeks in Base Camp, acclimatizing to the altitude. During that time, Sherpas and some expedition climbers will set up ropes and ladders in the treacherous Khumbu Icefall. Seracs, crevasses and shifting blocks of ice make the icefall one of the most dangerous sections of the route. Many climbers and Sherpas have been killed in this section. To reduce the hazard, climbers will usually begin their ascent well before dawn when the freezing temperatures glue ice blocks in place. Above the icefall is Camp I at .
From Camp I, climbers make their way up the Western Cwm to the base of the Lhotse face, where Camp II or Advanced Base Camp (ABC) is established at . The Western Cwm is a relatively flat, gently rising glacial valley, marked by huge lateral crevasses in the centre which prevent direct access to the upper reaches of the Cwm. Climbers are forced to cross on the far right near the base of Nuptse to a small passageway known as the "Nuptse corner". The Western Cwm is also called the "Valley of Silence" as the topography of the area generally cuts off wind from the climbing route. The high altitude and a clear, windless day can make the Western Cwm unbearably hot for climbers.
From ABC, climbers ascend the Lhotse face on fixed ropes up to Camp III, located on a small ledge at . From there, it is another 500 metres to Camp IV on the South Col at . From Camp III to Camp IV, climbers are faced with two additional challenges: The Geneva Spur and The Yellow Band. The Geneva Spur is an anvil shaped rib of black rock named by a 1952 Swiss expedition. Fixed ropes assist climbers in scrambling over this snow covered rock band. The Yellow Band is a section of interlayered marble, phyllite, and semischist which also requires about 100 metres of rope for traversing it.
China is paving a dirt road from Tingri County to its Base Camp in order to accommodate growing numbers of climbers on their side of the mountain. It will become the highest asphalt-paved road in the world. Construction began on 18 June 2007 at a cost of 150 million yuan (US$19.7 million). China also routed the 2008 Olympic Torch Relay over Everest, going up the South Col route and back down the North Col route, on the way to the 2008 Summer Olympics in Beijing.

Ascents

Early expeditions

In 1885, Clinton Thomas Dent, president of the Alpine Club, suggests that climbing Mount Everest is possible in his book Above the Snow Line.
On 8 June 1924, George Mallory and Andrew Irvine, both of the United Kingdom, made an attempt on the summit via the north col/north ridge route from which they never returned. On 1 May 1999, the Mallory and Irvine Research Expedition found Mallory's body in the predicted search area near the old Chinese camp. Controversy has raged in the mountaineering community as to whether or not one or both of them reached the summit 29 years before the confirmed ascent (and of course, safe descent) of Everest by Sir Edmund Hillary and Tenzing Norgay in 1953. The general consensus among climbers has been that they did not.
Mallory had gone on a speaking tour of the United States the year before in 1923; it was then that he exasperatedly gave the famous reply: "Because it is there!" to a New York journalist in response to hearing the question: "Why climb Everest?" for seemingly the thousandth time.
In 1933, Lady Houston, a British millionaire ex-showgirl, funded the Houston Everest Flight of 1933, which saw a formation of aircraft led by the Marquess of Clydesdale fly over the summit in an effort to deploy the British Union Flag at the top.
Early expeditions – such as Bruce's in the 1920s and Hugh Ruttledge's two unsuccessful attempts in 1933 and 1936 – tried to make an ascent of the mountain from Tibet, via the north face. Access was closed from the north to western expeditions in 1950, after the Chinese reasserted control over Tibet. However, in 1950, Bill Tilman and a small party which included Charles Houston, Oscar Houston and Betsy Cowles undertook an exploratory expedition to Everest through Nepal along the route which has now become the standard approach to Everest from the south.

First successful ascent by Tenzing and Hillary

In 1953, a ninth British expedition, led by John Hunt, returned to Nepal. Hunt selected two climbing pairs to attempt to reach the summit. The first pair (Tom Bourdillon and Charles Evans) came within 100 m (300 feet) of the summit on 26 May 1953, but turned back after becoming exhausted. As planned, their work in route finding and breaking trail and their caches of extra oxygen were of great aid to the following pair. Two days later, the expedition made its second and final assault on the summit with its second climbing pair, the New Zealander Edmund Hillary and Sherpa Tenzing Norgay from Nepal. They reached the summit at 11:30 a.m. local time on 29 May 1953 via the South Col Route. At the time, both acknowledged it as a team effort by the whole expedition, but Tenzing revealed a few years later that Hillary had put his foot on the summit first. They paused at the summit to take photographs and buried a few sweets and a small cross in the snow before descending.
News of the expedition's success reached London on the morning of Queen Elizabeth II's coronation. Returning to Kathmandu a few days later, Hunt (a Briton) and Hillary (a subject of Elizabeth, through her role as head of state of New Zealand) discovered that they had been promptly knighted in the Order of the British Empire, a KBE, for the ascent. Tenzing (a subject of the King of Nepal) was granted the George Medal by the UK. Hunt was ultimately made a life peer in Britain, while Hillary became a founding member of the Order of New Zealand.

First ascents without supplemental oxygen

On 8 May 1978, Reinhold Messner (Italy) and Peter Habeler (Austria) made the first ascent without supplemental oxygen, using the southeast ridge route.
The storm's impact on climbers on the mountain's other side, the North Ridge, where several climbers also died, was detailed in a first hand account by British filmmaker and writer Matt Dickinson in his book The Other Side of Everest.

2003 - 50th Anniversary of First Ascent

2003 marked the 50th anniversary of the first ascent, and a record number of teams, including some very distinguished climbers, climbed or attempted to climb the mountain.

2005 - Helicopter landing

On 14 May 2005, pilot Didier Delsalle of France landed a Eurocopter AS 350 B3 helicopter on the summit of Mount Everest (without any witness) and took off after about four minutes. (His rotors were continually engaged, constituting a "hover landing", and avoiding the risks of relying on the snow to support the aircraft.) He thereby set rotorcraft world records, for highest of both landing (de facto) and take-off (formally).
Delsalle had also performed, two days earlier, a take-off from the South Col; some press reports suggested that the report of the summit landing was a misunderstanding of a South Col one.

2006 - David Sharp controversy

Double-amputee climber Mark Inglis revealed in an interview with the press on May 23, 2006, that his climbing party, and many others, had passed a distressed climber, David Sharp, on May 15, sheltering under a rock overhang 450 metres below the summit, without attempting a rescue. The revelation sparked wide debate on climbing ethics, especially as applied to Everest. The climbers who left him said that the rescue efforts would be useless and only cause more deaths because of how many people it would have taken to pull him off.
Much of this controversy was captured by the Discovery Channel while filming the television program Everest: Beyond the Limit. A crucial decision affecting the fate of Sharp is shown in the program, where an early returning climber (Max Chaya) is descending and radios to his base camp manager (Russell Brice) that he has found a climber in distress. He is unable to identify Sharp, and Sharp had chosen to climb solo without any support, so he did not identify himself to other climbers. The base camp manager assumes that Sharp is part of a group that has abandoned him, and informs his climber that there is no chance of him being able to help Sharp [at 8000+ meters in altitude, barely anyone has the strength to help another man who is only semi conscious, and Max Chaya is only an amateur mountaineer]. As Sharp's condition deteriorates through the day and other descending climbers pass him, his opportunities for rescue diminish: his legs and feet curl from frost-bite, preventing him from walking; the later descending climbers are lower on oxygen and lack the strength to offer aid; time runs out for any Sherpas to return and rescue him. Most importantly, Sharp's decision to forgo all support leaves him with no margin for recovery.
As this debate raged, on May 26, Australian climber Lincoln Hall was found alive, after being declared dead the day before. He was found by a party of four climbers (Dan Mazur, Andrew Brash, Myles Osborne and Jangbu Sherpa) who, giving up their own summit attempt, stayed with Hall and descended with him and a party of 11 Sherpas sent up to carry him down. Hall later fully recovered. Similar actions have been recorded since, including on 21 May 2007, when Canadian climber Meagan McGrath initiated the successful high-altitude rescue of Nepali Usha Bista.

Various records

According to the Nepalese government, the youngest person to climb Mount Everest was a 15-year-old Sherpa girl, and the youngest foreigner was 18-year-old Californian Samantha Larson in 2007.
The fastest ascent over the northeast ridge was accomplished in 2007 by Austrian climber Christian Stangl, who needed 16h 42min for the 10km distance from Camp III to the summit, just barely beating Italian Hans Kammerlander's record of 17 hours, accomplished in 1996. Both men climbed alone and without supplementary oxygen. The fastest oxygen-supported ascent over the southeast ridge was Nepalese Pemba Dorjie Sherpa's 2004 climb, using 8h 10min for the 17km route. The fastest ascent without supplementary oxygen over the southeast ridge was accomplished by French Marc Batard who needed 22h 30min in 1988.
The oldest climber to successfully reach Mt. Everest's summit was 76-year-old Min Bahadur Sherchan, who did so 25 May 2008.

Death zone

While conditions for any area classified as a death zone apply to Mount Everest (altitudes higher than 8,000 m/26,246 ft), it is significantly more difficult for a climber to survive at the death zone on Mount Everest. Temperatures can dip to very low levels, resulting in frostbite of any body part exposed to the air. Because temperatures are so low, snow is well-frozen in certain areas and death by slipping and falling can also occur. High winds at these altitudes on Everest are also a potential threat to climbers. The atmospheric pressure at the top of Everest is about a third of sea level pressure, meaning there is about a third as much oxygen available to breathe as at sea level.
In May 2007, the Caudwell Xtreme Everest undertook a medical study of oxygen levels in human blood at extreme altitude. Over 200 volunteers climbed to Everest Base Camp where various medical tests were performed to examine blood oxygen levels. A small team also performed tests on the way to the summit.
Even at base camp the low level of available oxygen had direct effect on blood oxygen saturation levels. At sea level these are usually 98% to 99%, but at base camp this fell to between 85% and 87%. Blood samples taken at the summit indicated very low levels of oxygen present. A side effect of this is a vastly increased breathing rate, from 20-30 breaths per minute to 80-90 breaths, leading to exhaustion just trying to breathe.
Lack of oxygen, exhaustion, extreme cold, and the dangers of the climb all contribute to the death toll.
People who die during the climb are typically left behind. About 150 bodies have never been recovered. It is not uncommon that corpses are visible from the standard climbing routes.
One sometimes deadly phenomenon, however, does not plague climbers — lightning. Lightning does not strike Mount Everest. NASA's lightning detection system does record significant lightning in the Tibet plateau, but none along the high Tibetan mountains, from about 2000 m (7,000 feet) and above.

Bottled oxygen controversy

Most expeditions use oxygen masks and tanks above 8,000 m (26,246 ft). Everest can be climbed without supplementary oxygen but this increases the risk to the climber. Humans do not think clearly with low oxygen, and the combination of severe weather, low temperatures, and steep slopes often require quick, accurate decisions.
The use of bottled oxygen to ascend Mount Everest has been controversial. George Mallory himself described the use of such oxygen as unsportsmanlike, but he later concluded that it would be impossible to summit without it and consequently used it. When Tenzing and Hillary made the first successful summit in 1953, they used bottled oxygen. For the next twenty-five years, bottled oxygen was considered standard for any successful summit.
Reinhold Messner was the first climber to break the bottled oxygen tradition and in 1978, with Peter Habeler, made the first successful climb without it. Although critics alleged that he sucked mini-bottles of oxygen - a claim that Messner denied - Messner silenced them when he summited the mountain, without supplemental oxygen or support, on the more difficult northwest route, in 1980. In the aftermath of Messner's two successful ascents, the debate on bottled oxygen usage continued.
The aftermath of the 1996 disaster further intensified the debate. Jon Krakauer's Into Thin Air (1997) expressed the author's personal criticisms of the use of bottled oxygen. Krakauer wrote that the use of bottled oxygen allowed otherwise unqualified climbers to attempt to summit, leading to dangerous situations and more deaths. The May 11, 1996 disaster was partially caused by the sheer number of climbers (33 on that day) attempting to ascend, causing bottlenecks at the Hillary Step and delaying many climbers, most of whom summited after the usual 2 p.m. turnaround time. He proposed banning bottled oxygen except for emergency cases, arguing that this would both decrease the growing pollution on Everest—many bottles have accumulated on its slopes—and keep marginally qualified climbers off the mountain. The 1996 disaster also introduced the issue of the guide's role in using bottled oxygen. Guide Anatoli Boukreev's decision not to use bottled oxygen was sharply criticized by Jon Krakauer. Boukreev's supporters (who include G. Weston DeWalt, who co-wrote The Climb) state that using bottled oxygen gives a false sense of security. Krakauer and his supporters point out that, without bottled oxygen, Boukreev was unable to directly help his clients descend. They state that Boukreev said that he was going down with client Martin Adams,

Life-threatening thefts

Other climbers have reported life-threatening thefts from supply caches. Vitor Negrete, the first Brazilian to climb Everest without oxygen and part of David Sharp's party, died during his descent, and theft from his high-altitude camp may have contributed.

Flora and fauna

Euophrys omnisuperstes, a minute black jumping spider, has been found at elevations as high as , possibly making it the highest confirmed permanent resident on Earth. They lurk in crevices and possibly feed on frozen insects that have been blown there by the wind. It should be noted that there is a high likelihood of microscopic life at even higher altitudes.
Birds, such as the bar-headed goose, have been seen flying at the higher altitudes of the mountain, while others such as the Chough have been spotted as high as the South Col (7,920 m), scavenging on food, or even corpses, left over by climbing expeditions.

Geology

Geologists have subdivided the rocks comprising Mount Everest into three units called "formations". Each of these formations are separated from each other by low-angle faults, called “detachments”, along which they have been thrust over each other. From the summit of Mount Everest to its base these rock units are the Qomolangma Formation, the North Col Formation, and the Rongbuk Formation.
From its summit to the top of the Yellow Band, about 8,600 m above sea level, the top of Mount Everest consists of the Qomolangma Formation, which has also been designated as either the Everest Formation or Jolmo Lungama Formation. It consists of grayish to dark gray or white, parallel laminated and bedded limestone interlayered with subordinate beds of recrystallized dolomite with argillaceous laminae and siltstone. Gansser reported finding visible fragments of crinoids in these limestones. Petrographic analysis of samples of this Ordovician limestone from near the summit revealed them to be composed of carbonate pellets and finely fragmented remains of trilobites, crinoids, and ostracods. Other samples were so badly sheared and recrystallized that their original constituents could not be determined. The Qomolangma Formation is broken up by several high-angle faults that terminate at the low angle thrust fault, the Qomolangma Detachment. This detachment separates it from the underlying Yellow Band. The lower five metres of the Qomolangma Formation overlying this detachment are very highly deformed.

Image gallery

References

Bibliography

  • American Alpine Journal 2005, p. 393.
everest in Amharic: ኤቨረስት ተራራ
everest in Arabic: جبل إفرست
everest in Aragonese: Everest
everest in Asturian: Everest
everest in Bengali: মাউন্ট এভারেস্ট
everest in Min Nan: Chomolangma Hong
everest in Belarusian (Tarashkevitsa): Эвэрэст
bh:सगरमाथा
everest in Central Bicolano: Bukid Everest
everest in Bosnian: Mount Everest
everest in Bulgarian: Еверест
everest in Catalan: Everest
everest in Czech: Mount Everest
everest in Welsh: Mynydd Everest
everest in Danish: Mount Everest
everest in German: Mount Everest
everest in Dhivehi: އެވަރެސްޓް ފަރުބަދަ
everest in Estonian: Džomolungma
everest in Modern Greek (1453-): Έβερεστ
everest in Spanish: Monte Everest
everest in Esperanto: Ĉomolungmo
everest in Basque: Everest
everest in Persian: کوه اورست
everest in Faroese: Mount Everest
everest in French: Everest
everest in Irish: Teomólongma
everest in Gan Chinese: 珠穆朗瑪峰
everest in Scottish Gaelic: Beinn Everest
everest in Galician: Everest
everest in Classical Chinese: 珠穆朗瑪峰
everest in Hakka Chinese: Chû-mu̍k-lòng-mâ-fûng
everest in Korean: 에베레스트 산
everest in Hindi: माउंट एवरेस्ट
everest in Croatian: Mount Everest
everest in Ido: Monto Everest
everest in Indonesian: Gunung Everest
everest in Icelandic: Everestfjall
everest in Italian: Everest
everest in Hebrew: אוורסט
everest in Javanese: Mount Everest
everest in Georgian: ჯომოლუნგმა
everest in Swahili (macrolanguage): Everest (mlima)
everest in Kurdish: Mount Everest
everest in Latin: Mons Everestis
everest in Latvian: Everests
everest in Luxembourgish: Mount Everest
everest in Lithuanian: Džomolungma
everest in Hungarian: Mount Everest
everest in Macedonian: Монт Еверест
everest in Malayalam: എവറസ്റ്റ്‌ കൊടുമുടി
everest in Marathi: एव्हरेस्ट
everest in Malay (macrolanguage): Gunung Everest
everest in Dutch: Mount Everest
everest in Nepali: सगरमाथा
everest in Newari: सगरमाथा अञ्चल
everest in Japanese: エベレスト
everest in Norwegian: Mount Everest
everest in Norwegian Nynorsk: Mount Everest
everest in Piemontese: Everest
everest in Polish: Mount Everest
everest in Portuguese: Monte Everest
everest in Romanian: Everest
everest in Romansh: Mount Everest
everest in Quechua: Chomolungma
everest in Russian: Джомолунгма
everest in Albanian: Mali Everest
everest in Sicilian: Everest
everest in Simple English: Mount Everest
everest in Slovak: Mount Everest
everest in Slovenian: Mount Everest
everest in Serbian: Монт Еверест
everest in Serbo-Croatian: Mount Everest
everest in Finnish: Mount Everest
everest in Swedish: Mount Everest
everest in Tagalog: Bundok Everest
everest in Tamil: எவரெஸ்ட் சிகரம்
everest in Telugu: ఎవరెస్టు పర్వతం
everest in Thai: ยอดเขาเอเวอเรสต์
everest in Vietnamese: Everest
everest in Turkish: Everest Dağı
everest in Turkmen: Ewerest
everest in Ukrainian: Джомолунгма
everest in Urdu: ماؤنٹ ایورسٹ
everest in Contenese: 珠穆朗瑪峰
everest in Samogitian: Everests
everest in Chinese: 珠穆朗瑪峰
Privacy Policy, About Us, Terms and Conditions, Contact Us
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2
Material from Wikipedia, Wiktionary, Dict
Valid HTML 4.01 Strict, Valid CSS Level 2.1