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The Andes (/ˈændiːz/ AN-deez), Andes Mountains or Andean Mountain Range (Spanish: Cordillera de los Andes; Quechua: Anti) are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range is 8,900 km (5,530 mi) long and 200 to 700 km (124 to 435 mi) wide (widest between 18°S and 20°S latitude) and has an average height of about 4,000 m (13,123 ft). The Andes extend from South to North through seven South American countries: Argentina, Chile, Bolivia, Peru, Ecuador, Colombia, and Venezuela.
Along their length, the Andes are split into several ranges, separated by intermediate depressions. The Andes are the location of several high plateaus—some of which host major cities such as Quito, Bogotá, Cali, Arequipa, Medellín, Bucaramanga, Sucre, Mérida, El Alto, and La Paz. The Altiplano Plateau is the world's second highest after the Tibetan Plateau. These ranges are in turn grouped into three major divisions based on climate: the Tropical Andes, the Dry Andes, and the Wet Andes. (Full article...)
Selected general articles
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Image 1
Monte Fitz Roy (also known as Cerro Chaltén, Cerro Fitz Roy, or simply Mount Fitz Roy) is a mountain in Patagonia, on the border between Argentina and Chile. It is located in the Southern Patagonian Ice Field, near El Chaltén village and Viedma Lake. It was first climbed in 1952 by French alpinists Lionel Terray and Guido Magnone. (Full article...) -
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Cerro del Nacimiento is an Andean volcano of the Cordillera de la Ramada range, in the Catamarca Province of Argentina. Its summit is 6,436 metres (21,115 ft) above sea level. (Full article...) -
Image 3Paquni (Aymara paqu a kind of edible herb, -ni a suffix, "the one with the paqu herbs", Hispanicized spelling Pacuni) is a 4,838-metre-high (15,873 ft) mountain in the Potosí Department of Bolivia. It is located in the Antonio Quijarro Province, Tomave Municipality, northeast of the Jatun Mundo Quri Warani volcano. (Full article...)
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Image 4
Sierra Nevada, also known as Sierra Nevada de Lagunas Bravas, is a major ignimbrite-lava dome complex which lies in both Chile and Argentina in one of the most remote parts of the Central Andes.
Activity in the complex started in Argentina and formed two stratovolcanoes. Later, 12 or more vents formed, some with craters up to 400 metres (1,300 ft) wide. Lava flows up to 7 kilometres (4.3 mi) long with flow ridges are also found. It covers a total area of 225 km2. Radiometric dating has yielded ages of 1.7 ± 0.4 to 0.431 ± 0.012 million years ago, a lava flow from the neighbouring Azufrera Los Cuyanos volcano that is sometimes considered part of Sierra Nevada is 140,000 years old. Together with Cerro el Condor and Peinado it forms the Culampaja line, a line of volcanoes that reaches Cerro Blanco. Strong seismic attenuation is observed beneath Sierra Nevada. Hydrothermally altered rocks in Sierra Nevada may be the source of sulfate and arsenic in the Juncalito and Negro rivers, and heat sources for regional hot springs. The snowline in the area lies at 5,800 metres (19,000 ft) altitude at Cumbre del Laudo. (Full article...) -
Image 5
Trichomycterus rivulatus is a species of pencil catfish that is native to high-altitude Andean streams and lakes (including Junin, Poopó and Titicaca) in southern Peru, western Bolivia and northern Chile. It is the largest species in the genus Trichomycterus and grows to a maximum length of 37.4 centimetres (14.7 in) TL. The species is regularly caught as a food fish. However, because of pollution, studies have revealed levels of metals in T. rivulatus of Lake Titicaca that exceed the internationally recommended safety thresholds for human consumption. (Full article...) -
Image 6Touching the Void is a 2003 survival documentary film directed by Kevin Macdonald and starring Brendan Mackey, Nicholas Aaron, and Ollie Ryall. The plot concerns Joe Simpson and Simon Yates' near-fatal descent after making the first successful ascent of the West Face of Siula Grande in the Cordillera Huayhuash in the Peruvian Andes, in 1985. It is based on Simpson's 1988 book of the same name.
Critically acclaimed, Touching the Void was listed in PBS's "100 Greatest Documentaries of All Time". The Guardian described it as "the most successful documentary in British cinema history". (Full article...) -
Image 7
Jirishanca is a 6,094-metre-high (19,993 ft) mountain in the Huayhuash mountain range in west central Peru, part of the Andes. Other sources cite a height of 6,125 metres (20,095 ft). It is the tenth highest peak in Peru and the third in the Huayhuash range (after Yerupajá and Siula Grande). Jirishanca translates as "hummingbird bill peak". (Full article...) -
Image 8
Huayna Potosí is a mountain in Bolivia, located near El Alto and about 25 km north of La Paz in the Cordillera Real.
Huayna Potosí is the closest high mountain to La Paz. Surrounded by high mountains, it is roughly 15 miles due north of the city, which makes this mountain the most popular climb in Bolivia. The normal ascent route is a fairly straightforward glacier climb, with some crevasses and a steep climb to the summit. However, the other side of the mountain—Huayna Potosí West Face—is the biggest face in Bolivia. Several difficult snow and ice routes ascend this 1,000-meter-high face. (Full article...) -
Image 9
Cotopaxi (Spanish pronunciation: [kotoˈpaksi]) is an active stratovolcano in the Andes Mountains, located near Latacunga city of Cotopaxi Province, about 50 km (31 mi) south of Quito, and 31 km (19 mi) northeast of the city of Latacunga, Ecuador. It is the second highest summit in Ecuador (after Chimborazo), reaching a height of 5,897 m (19,347 ft). Cotopaxi is among the highest active volcanoes in the world.
Cotopaxi is known to have erupted 87 times, resulting in the creation of numerous valleys formed by lahars (mudflows) around the volcano. An ongoing eruption began on 21 October 2022. (Full article...) -
Image 10
Tata Sabaya is a 5,430-metre (17,810 ft) high volcano in Bolivia. It is part of the Central Volcanic Zone, one of several volcanic belts in the Andes which are separated by gaps without volcanic activity. This section of the Andes was volcanically active since the Jurassic, with an episode of strong ignimbritic volcanism occurring during the Miocene. Tata Sabaya lies in a thinly populated region north of the Salar de Coipasa salt pan.
Volcanic activity at Tata Sabaya and elsewhere in the Central Volcanic Zone is the consequence of the subduction of the Nazca Plate beneath the South America Plate. The volcano has developed along a lineament that separates older crust north of the lineament from younger crust in the south, and the edifice has been formed by andesitic rocks. (Full article...) -
Image 11
Lanín is an ice-clad, cone-shaped stratovolcano on the border of Argentina and Chile. It forms part of two national parks: Lanín in Argentina and Villarrica in Chile. As a part of the flag and anthem of the Argentine province of Neuquén, it serves as a symbol for the region. Although the date of its last eruption is not known, it is estimated to have occurred within the last 10,000 years. Following the 1906 Valparaíso earthquake a local newspaper reported the volcano to have erupted, but a work published in 1917 by Karl Sapper disputed this.
The ascent is regulated by the management of Argentine National Parks and the Argentine National Gendarmerie and is technically relatively simple but has a much higher level of exposure than the neighbouring volcanoes. The nearest towns, usually employed as a base for climbers, are Pucón in Chile and Junín de los Andes in Argentina. (Full article...) -
Image 12
Chimborazo (Spanish pronunciation: [tʃimboˈɾaso] ⓘ) is a stratovolcano situated in Ecuador in the Cordillera Occidental range of the Andes. Its last known eruption is believed to have occurred around 550 A.D. Although not the tallest mountain in the Andes or on Earth relative to sea level, its summit is the farthest point on Earth's surface from the Earth's center due to its location along the planet's equatorial bulge. Chimborazo's height from sea level is 6,263 m (20,548 ft), well below that of Mount Everest at 8,849 m (29,031 ft)
Chimborazo is the highest mountain in Ecuador and the 39th-highest peak in the entire Andes. It is a popular destination for mountaineering due to its challenging climbing routes, which involve traversing snow, ice, and rocky terrain. (Full article...) -
Image 13
Artesonraju is a pyramidal mountain peak located near the city of Caraz in the Cordillera Blanca mountain range in the Peruvian Andes. It is located at the Peruvian province of Huaylas and its slopes are within two cities: Santa Cruz and Caraz. Its summit has an elevation of 6,025 metres (19,767 ft) (or 5,999 metres (19,682 ft) according to the IGN-Peru map). It is one of many prominent peaks (2772 metres) located within the boundaries of Peru's Huascarán National Park.
Artesonraju has two distinguished climbing routes. Due to their difficulties, Artesonraju is seldom successfully climbed in comparison to other well known mountains in the Cordillera Blanca. This mountain serves as the inspiration mascot for the newer Paramount Pictures production logo. (Full article...) -
Image 14
Quilotoa (Spanish pronunciation: [kiloˈto.a]) is a water-filled crater lake and the most western volcano in the Ecuadorian Andes. The 3-kilometre (2 mi)-wide caldera was formed by the collapse of this dacite volcano following a catastrophic VEI-6 eruption about 800 years ago, which produced pyroclastic flows and lahars that reached the Pacific Ocean, and spread an airborne deposit of volcanic ash throughout the northern Andes. This last eruption followed a dormancy period of 14,000 years and is known as the 1280 Plinian eruption. The fourth (of seven) eruptive phase was phreatomagmatic, indicating that a Crater lake was already present at that time. The caldera has since accumulated a 250-metre-deep (820 ft) crater lake, which has a greenish color as a result of dissolved minerals. Fumaroles are found on the lake floor and hot springs occur on the eastern flank of the volcano.
Quilotoa is a site of growing popularity. The route to the "summit" (the small town of Quilotoa) is generally traveled by hired truck or bus from the town of Zumbahua 17 kilometres (11 mi) to the South, or more commonly by bus from Latacunga. Visitors have to pay two US dollars each to enter Quilotoa. There are a number of simple hostels in the immediate area offering services such as mules and guides. Activities include a four to five-hour hike around the caldera (whose diameter is just over 3 kilometres (2 mi)). The caldera rim is highly irregular and reaches its maximum elevations 3,810 metres (12,500 ft) to the N, 3,894 metres (12,776 ft) to the NW and 3,915 metres (12,844 ft) to the SE, at three lava domes. The 10-kilometre (6 mi) hike is sandy and steep in places and can be quite taxing, particularly if there is fog. (Full article...) -
Image 15
Incahuasi (Spanish pronunciation: [iŋkaˈwasi]; possibly from Quechua: inka Inca, wasi house) is a volcanic mountain in the Andes of South America. It lies on the border of the Catamarca Province of Argentina and the Atacama Region of Chile. Incahuasi has a summit elevation of 6,621 metres (21,722 ft) above sea level.
The volcano consists of a 3.5-kilometre-wide (2.2 mi) caldera and two stratovolcanoes. Four pyroclastic cones located 7 kilometres (4.3 mi) to the northeast have produced basalt-andesite lava flows that cover an area of 10 square kilometres (4 sq mi). (Full article...) -
Image 16
Chacaltaya (Mollo language for "bridge of winds" or "winds meeting point", Aymara for "cold road"[dubious – discuss]) is a mountain in the Cordillera Real, one of the mountain ranges of the Cordillera Oriental, itself a range of the Bolivian Andes. Its elevation is 5,421 meters (17,785 ft). Chacaltaya's glacier — which was as old as 18,000 years — had an area of 0.22 km2 (0.085 sq mi) in 1940, which had been reduced to 0.01 km2 (0.0039 sq mi) in 2007 and was completely gone by 2009. Half of the meltdown, as measured by volume, took place before 1980. The final meltdown after 1980, due to missing precipitation and the warm phase of El Niño, resulted in the glacier's disappearance in 2009. The glacier was located about 30 kilometers (19 mi) from La Paz, near Huayna Potosí mountain. (Full article...) -
Image 17
Cerro Escorial is a stratovolcano at the border of Argentina and Chile. It is part of the Corrida de Cori volcanic group and its youngest member. A well-preserved 1-kilometre-wide (0.6 mi) crater forms its summit area. Lava flows are found on the Chilean and smaller ones on the Argentinian side, the former reaching as far as 3–4 kilometres (1.9–2.5 mi) from the volcano. One of these is dated 342,000 years ago by argon-argon dating.
Off the western coast of South America, the Nazca Plate subducts beneath the South America Plate. This process has given rise to the Andes mountain chain and the Altiplano-Puna high plateau, which formed through shortening of the crust that lasted until 1 million years ago. Cerro Escorial rises from the Puna, which is dissected at Cerro Escorial by the Archibarca lineament; it is a strike-slip fault that has facilitated the ascent of magma. (Full article...) -
Image 18
Telmatobius is a genus of frogs native to the Andean highlands in South America, where they are found in Ecuador, Peru, Bolivia, northwestern Argentina and northern Chile. It is the only genus in the family Telmatobiidae. Some sources recognize Batrachophrynus as a valid genus distinct from Telmatobius. (Full article...) -
Image 19
El Cocuy National Park is a national park located in the Andes Mountains within the nation of Colombia. Its official name is Parque Nacional Natural El Cocuy. (Full article...) -
Image 20Orestias chungarensis is a species of fish in the family Cyprinodontidae. It is endemic to Lake Chungara in Chile. (Full article...)
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Image 21
Acotango is the central and highest of a group of stratovolcanoes straddling the border of Bolivia and Chile. It is 6,052 metres (19,856 ft) high. The group is known as Kimsa Chata and consists of three mountains: Acotango, Umurata (5,730 metres (18,799 ft)) north of it and Capurata (5,990 metres (19,652 ft)) south of it.
The group lies along a north–south alignment. The Acotango volcano is heavily eroded, but a lava flow on its northern flank is morphologically young, suggesting Acotango was active in the Holocene. Later research has suggested that lava flow may be of Pleistocene age. Argon-argon dating has yielded ages of 192,000±8,000 and 241,000±27,000 years on dacites from Acotango. Glacial activity has exposed parts of the inner volcano, which is hydrothermally altered. Glacial moraines lie at an altitude of 4,200 metres (13,800 ft) but a present ice cap is only found past 6,000 metres (20,000 ft) of altitude. (Full article...) -
Image 22
Aconcagua (Spanish pronunciation: [akoŋˈkaɣwa]) is a mountain in the Principal Cordillera of the Andes mountain range, in Mendoza Province, Argentina. It is the highest mountain in the Americas, the highest outside Asia, and the highest in both the Western Hemisphere and the Southern Hemisphere with a summit elevation of 6,961 metres (22,838 ft). Despite its impressive size and stature, it is only the 189th highest mountain in the world. It lies 112 kilometres (70 miles) northwest of the provincial capital, the city of Mendoza, about five kilometres (three miles) from San Juan Province, and 15 km (9 mi) from Argentina's border with Chile. The mountain is one of the Seven Summits of the seven continents.
Aconcagua is bounded by the Valle de las Vacas to the north and east and the Valle de los Horcones Inferior to the west and south. The mountain and its surroundings are part of the Aconcagua Provincial Park. The mountain has a number of glaciers. The largest glacier is the Ventisquero Horcones Inferior at about 10 km (6 mi) long, which descends from the south face to about 3,600 m (11,800 ft) in elevation near the Confluencia camp.
Two other large glacier systems are the Ventisquero de las Vacas Sur and Glaciar Este/Ventisquero Relinchos system at about 5 km (3 mi) long. The best known is the northeastern or Polish Glacier, as it is a common route of ascent. (Full article...) -
Image 23
Pichincha is a stratovolcano in Ecuador. The capital Quito wraps around its eastern slopes.
The two highest peaks of the mountain are Wawa Pichincha (Kichwa wawa child, baby / small, Spanish spelling Guagua Pichincha) (4,784 metres (15,696 ft)) and Ruku Pichincha (Kichwa ruku old person, Spanish Rucu Pichincha) (4,698 metres (15,413 ft)). The active caldera is in Wawa Pichincha on the western side of the mountain. (Full article...) -
Image 24
Hudson Volcano (Spanish: Volcán Hudson, Cerro Hudson, or Monte Hudson) is the most active volcano in the southern part of the Southern Volcanic Zone of the Andes Mountains in Chile, having erupted most recently in 2011. It was formed by the subduction of the oceanic Nazca Plate under the continental South American Plate. South of Hudson is a smaller volcano, followed by a long gap without active volcanoes, then the Austral Volcanic Zone. Hudson has the form of a 10-kilometre-wide (6-mile) caldera filled with ice; the Huemules Glacier emerges from the northwestern side of the caldera. The volcano has erupted rocks ranging from basalt to rhyolite, but large parts of the caldera are formed by non-volcanic rocks.
The volcano erupted numerous times in the late Pleistocene and Holocene, forming widespread tephra deposits both in the proximity of Hudson and in the wider region.
Four large eruptions took place in 17,300–17,440 BP ("H0 eruption"), 7,750 BP ("H1 eruption"), 4,200 BP ("H2 eruption") and in 1991 AD ("H3 eruption"); the second is among the most intense volcanic eruptions in South America during the Holocene. A smaller eruption occurred in 1971. The 7,750 BP and 1991 eruptions had a substantial impact on the human population of Patagonia and (for the 7,750 BP eruption) Tierra del Fuego: The 7,750 BP eruption devastated the local ecosystem and may have caused substantial shifts in human settlement and lifestyle. During the 1991 eruption, volcanic ash covered a large area in Chile and neighbouring Argentina, causing high mortality in farm animals, aggravating an existing economic crisis, and reaching as far as Antarctica. (Full article...) -
Image 25
Chumpe (possibly from Quechua chumpi: belt), Jatunriti, Ñanaloma or Yanaloma is a mountain in the Vilcanota mountain range in the Andes of Peru with 6,106 metres (20,033 ft) of elevation. It is located in the Cusco Region, Canchis Province, Pitumarca District as well as in the Quispicanchi Province, Ocongate District. Chumpe lies north of Lake Sibinacocha. (Full article...)
Did you know...
- ... that the 1930s Polish Andean expeditions have been credited with several first ascents and the tracing of a new route to the summit of Aconcagua, the Andes' highest peak?
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Selected images
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Image 2Peruvian farmers sowing maize and beans (from Andes)
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Image 4Pico Humboldt at sunset (from Andes)
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Image 6Central Andes (from Andes)
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Image 16Aerial view of Valle Carbajal in the Tierra del Fuego. The Andes range is about 200 km (124 mi) wide throughout its length, except in the Bolivian flexure where it is about 640 kilometres (398 mi) wide. (from Andes)
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Image 18Bolivian Andes (from Andes)
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Image 20A male Andean cock-of-the-rock, a species found in humid Andean forests and the national bird of Peru (from Andes)
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Image 23Irrigating land in the Peruvian Andes (from Andes)
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Image 24Huayna Potosí, Bolivia (from Andes)
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