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The Andes, Andes Mountains or Andean Mountains (; ) are the longest continental mountain range in the world, forming a continuous highland along the western edge of
South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the souther ...
. The range is long, wide (widest between 18°S20°S
latitude In geography, latitude is a coordinate that specifies the north– south position of a point on the surface of the Earth or another celestial body. Latitude is given as an angle that ranges from –90° at the south pole to 90° at the north po ...
), and has an average height of about . The Andes extend from north to south through seven South American countries:
Venezuela Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in ...
, Colombia,
Ecuador Ecuador ( ; ; Quechuan languages, Quechua: ''Ikwayur''; Shuar language, Shuar: ''Ecuador'' or ''Ekuatur''), officially the Republic of Ecuador ( es, República del Ecuador, which literally translates as "Republic of the Equator"; Quechuan ...
,
Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...
,
Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...
,
Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the eas ...
, and
Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, t ...
. Along their length, the Andes are split into several ranges, separated by intermediate depressions. The Andes are the location of several high
plateau In geology and physical geography, a plateau (; ; ), also called 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 ...
s—some of which host major cities such as
Quito Quito (; qu, Kitu), formally San Francisco de Quito, is the capital city, capital and largest city of Ecuador, with an estimated population of 2.8 million in its urban area. It is also the capital of the province of Pichincha Province, Pichincha ...
,
Bogotá Bogotá (, also , , ), officially Bogotá, Distrito Capital, abbreviated Bogotá, D.C., and formerly known as Santa Fe de Bogotá (; ) during the Spanish period and between 1991 and 2000, is the capital city of Colombia, and one of the largest ...
,
Cali Santiago de Cali (), or Cali, is the capital of the Valle del Cauca department, and the most populous city in southwest Colombia, with 2,227,642 residents according to the 2018 census. The city spans with of urban area, making Cali the secon ...
,
Arequipa Arequipa (; Aymara and qu, Ariqipa) is a city and capital of province and the eponymous department of Peru. It is the seat of the Constitutional Court of Peru and often dubbed the "legal capital of Peru". It is the second most populated cit ...
,
Medellín Medellín ( or ), officially the Municipality of Medellín ( es, Municipio de Medellín), is the second-largest city in Colombia, after Bogotá, and the capital of the department of Antioquia. It is located in the Aburrá Valley, a central re ...
, Bucaramanga,
Sucre Sucre () is the capital of Bolivia, the capital of the Chuquisaca Department and the 6th most populated city in Bolivia. Located in the south-central part of the country, Sucre lies at an elevation of . This relatively high altitude gives the ...
, Mérida, El Alto and
La Paz La Paz (), officially known as Nuestra Señora de La Paz (Spanish pronunciation: ), is the seat of government of the Plurinational State of Bolivia. With an estimated 816,044 residents as of 2020, La Paz is the third-most populous city in Bo ...
. The
Altiplano plateau The Altiplano (Spanish for "high plain"), Collao ( Quechua and Aymara: Qullaw, meaning "place of the Qulla") or Andean Plateau, in west-central South America, is the most extensive high plateau on Earth outside Tibet. The plateau is located at ...
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 Tropical Andes is northern of the three climate-delineated parts of the Andes, the others being the Dry Andes and the Wet Andes. The Tropical Andes' area spans . Geography and ecology file:Andes_clima.png, 200px, Map of the climatic regions ...
, the
Dry Andes 200px, Map of the climatic regions of the Andes. The Dry Andes are shown in yellow. The Andes áridos) is a climatic and glaciology">glaciological subregion of the Andes. Together with the Wet Andes it is one of the two subregions of the Argentin ...
, and the Wet Andes. The Andes Mountains are the highest mountain range outside Asia. The highest mountain outside Asia, Argentina's Mount Aconcagua, rises to an elevation of about above sea level. The peak of Chimborazo in the Ecuadorian Andes is farther from the Earth's center than any other location on the Earth's surface, due to the equatorial bulge resulting from the Earth's rotation. The world's highest
volcano A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates ...
es are in the Andes, including Ojos del Salado on the Chile-Argentina border, which rises to . The Andes are also part of the American Cordillera, a chain of mountain ranges ( cordillera) that consists of an almost continuous sequence of mountain ranges that form the western "backbone" of North America, Central America, South America and Antarctica.


Etymology

The etymology of the word ''Andes'' has been debated. The majority consensus is that it derives from the Quechua word 'east'Teofilo Laime Ajacopa, Diccionario Bilingüe Iskay simipi yuyayk'ancha, La Paz, 2007 (Quechua–Spanish dictionary) as in '' Antisuyu'' (Quechua for 'east region'), one of the four regions of the
Inca Empire The Inca Empire (also known as the Incan Empire and the Inka Empire), called ''Tawantinsuyu'' by its subjects, ( Quechua for the "Realm of the Four Parts",  "four parts together" ) was the largest empire in pre-Columbian America. The adm ...
. The term '' cordillera'' comes from the Spanish word ''cordel'' 'rope' and is used as a descriptive name for several contiguous sections of the Andes, as well as the entire Andean range, and the combined mountain chain along the western part of the North and South American continents.


Geography

The Andes can be divided into three sections: ; The Southern Andes: in Argentina and Chile, south of Llullaillaco. ; The Central Andes: in Peru and Bolivia. ; The Northern Andes: in Venezuela, Colombia, and Ecuador. In the northern part of the Andes, the separate
Sierra Nevada de Santa Marta The Sierra Nevada de Santa Marta (English: ''Snow-Covered Mountain Range of Saint Martha'') is an isolated mountain range in northern Colombia, separate from the Andes range that runs through the north of the country. Reaching an elevation of ...
range is often treated as part of the Northern Andes. The Leeward Antilles islands Aruba,
Bonaire Bonaire (; , ; pap, Boneiru, , almost pronounced ) is a Dutch island in the Leeward Antilles in the Caribbean Sea. Its capital is the port of Kralendijk, on the west (leeward) coast of the island. Aruba, Bonaire and Curaçao form the ABC ...
, and
Curaçao Curaçao ( ; ; pap, Kòrsou, ), officially the Country of Curaçao ( nl, Land Curaçao; pap, Pais Kòrsou), is a Lesser Antilles island country in the southern Caribbean Sea and the Dutch Caribbean region, about north of the Venezuela coas ...
, which lie in the
Caribbean Sea The Caribbean Sea ( es, Mar Caribe; french: Mer des Caraïbes; ht, Lanmè Karayib; jam, Kiaribiyan Sii; nl, Caraïbische Zee; pap, Laman Karibe) is a sea of the Atlantic Ocean in the tropics of the Western Hemisphere. It is bounded by Mexico ...
off the coast of Venezuela, were formerly thought to represent the submerged peaks of the extreme northern edge of the Andes range, but ongoing geological studies indicate that such a simplification does not do justice to the complex tectonic boundary between the South American and Caribbean plates.


Geology

The Andes are a
Mesozoic The Mesozoic Era ( ), also called the Age of Reptiles, the Age of Conifers, and colloquially as the Age of the Dinosaurs is the second-to-last era of Earth's geological history, lasting from about , comprising the Triassic, Jurassic and Creta ...
Tertiary Tertiary ( ) is a widely used but obsolete term for the geologic period from 66 million to 2.6 million years ago. The period began with the demise of the non- avian dinosaurs in the Cretaceous–Paleogene extinction event, at the start ...
orogenic belt of mountains along the Pacific Ring of Fire, a zone of
volcanic activity Volcanism, vulcanism or volcanicity is the phenomenon of eruption of molten rock (magma) onto the surface of the Earth or a solid-surface planet or moon, where lava, pyroclastics, and volcanic gases erupt through a break in the surface called a ...
that encompasses the Pacific rim of the Americas as well as the
Asia-Pacific Asia-Pacific (APAC) is the part of the world near the western Pacific Ocean. The Asia-Pacific region varies in area depending on context, but it generally includes East Asia, Russian Far East, South Asia, Southeast Asia, Australia and Pacific Isla ...
region. The Andes are the result of tectonic plate processes, caused by the subduction of
oceanic crust Oceanic crust is the uppermost layer of the oceanic portion of the tectonic plates. It is composed of the upper oceanic crust, with pillow lavas and a dike complex, and the lower oceanic crust, composed of troctolite, gabbro and ultramafi ...
beneath the South American Plate. It is the result of a convergent plate boundary between the Nazca Plate and the South American Plate. The main cause of the rise of the Andes is the compression of the western rim of the South American Plate due to the subduction of the
Nazca Plate The Nazca Plate or Nasca Plate, named after the Nazca region of southern Peru, is an oceanic tectonic plate in the eastern Pacific Ocean basin off the west coast of South America. The ongoing subduction, along the Peru–Chile Trench, of the ...
and the Antarctic Plate. To the east, the Andes range is bounded by several sedimentary basins, such as Orinoco,
Amazon Basin The Amazon basin is the part of South America drained by the Amazon River and its tributaries. The Amazon drainage basin covers an area of about , or about 35.5 percent of the South American continent. It is located in the countries of Boli ...
, Madre de Dios and Gran Chaco, that separate the Andes from the ancient
craton A craton (, , or ; from grc-gre, κράτος "strength") is an old and stable part of the continental lithosphere, which consists of Earth's two topmost layers, the crust and the uppermost mantle. Having often survived cycles of merging and ...
s in eastern South America. In the south, the Andes share a long boundary with the former Patagonia Terrane. To the west, the Andes end at the
Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the contine ...
, although the Peru-Chile trench can be considered their ultimate western limit. From a geographical approach, the Andes are considered to have their western boundaries marked by the appearance of coastal lowlands and a less rugged topography. The Andes Mountains also contain large quantities of iron ore located in many mountains within the range. The Andean orogen has a series of bends or oroclines. The Bolivian Orocline is a seaward concave bending in the coast of South America and the Andes Mountains at about 18° S. At this point, the orientation of the Andes turns from Northwest in
Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...
to South in
Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the eas ...
and
Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, t ...
. The Andean segment north and south of the Orocline have been rotated 15° to 20° counter clockwise and clockwise respectively. The Bolivian Orocline area overlaps with the area of maximum width of the
Altiplano Plateau The Altiplano (Spanish for "high plain"), Collao ( Quechua and Aymara: Qullaw, meaning "place of the Qulla") or Andean Plateau, in west-central South America, is the most extensive high plateau on Earth outside Tibet. The plateau is located at ...
and according to Isacks (1988) the Orocline is related to crustal shortening. The specific point at 18° S where the coastline bends is known as the "Arica Elbow". Further south lies the Maipo Orocline a more subtle Orocline between 30° S and 38°S with a seaward-concave break in trend at 33° S. Near the southern tip of the Andes lies the Patagonian Orocline.


Orogeny

The western rim of the South American Plate has been the place of several pre-Andean
orogenies Orogeny is a mountain building process. An orogeny is an event that takes place at a convergent plate margin when plate motion compresses the margin. An ''orogenic belt'' or ''orogen'' develops as the compressed plate crumples and is uplifted t ...
since at least the late
Proterozoic The Proterozoic () is a geological eon spanning the time interval from 2500 to 538.8million years ago. It is the most recent part of the Precambrian "supereon". It is also the longest eon of the Earth's geologic time scale, and it is subdivided ...
and early
Paleozoic The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838 by combining the Greek words ''palaiós'' (, "old") and ' ...
, when several terranes and microcontinents collided and amalgamated with the ancient
craton A craton (, , or ; from grc-gre, κράτος "strength") is an old and stable part of the continental lithosphere, which consists of Earth's two topmost layers, the crust and the uppermost mantle. Having often survived cycles of merging and ...
s of eastern South America, by then the South American part of
Gondwana Gondwana () was a large landmass, often referred to as a supercontinent, that formed during the late Neoproterozoic (about 550 million years ago) and began to break up during the Jurassic period (about 180 million years ago). The final st ...
. The formation of the modern Andes began with the events of the
Triassic The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago (Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period ...
when
Pangaea Pangaea or Pangea () was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It assembled from the earlier continental units of Gondwana, Euramerica and Siberia during the Carboniferous approximately 335 millio ...
began the break up that resulted in developing several
rift In geology, a rift is a linear zone where the lithosphere is being pulled apart and is an example of extensional tectonics. Typical rift features are a central linear downfaulted depression, called a graben, or more commonly a half-grabe ...
s. The development continued through the
Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The J ...
Period. It was during the
Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of ...
Period that the Andes began to take their present form, by the uplifting, faulting and folding of
sedimentary Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles ...
and
metamorphic Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock ( protolith) is subjected to temperatures greater than and, often, elevated pressure of or more, cau ...
rocks of the ancient cratons to the east. The rise of the Andes has not been constant, as different regions have had different degrees of tectonic stress, uplift, and
erosion Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location where it is deposited. Erosion is di ...
. Tectonic forces above the subduction zone along the entire west coast of South America where the
Nazca Plate The Nazca Plate or Nasca Plate, named after the Nazca region of southern Peru, is an oceanic tectonic plate in the eastern Pacific Ocean basin off the west coast of South America. The ongoing subduction, along the Peru–Chile Trench, of the ...
and a part of the Antarctic Plate are sliding beneath the South American Plate continue to produce an ongoing orogenic event resulting in minor to major
earthquake An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, from ...
s and
volcanic eruption Several types of volcanic eruptions—during which lava, tephra (ash, lapilli, volcanic bombs and volcanic blocks), and assorted gases are expelled from a volcanic vent or fissure—have been distinguished by volcanologists. These are ...
s to this day. In the extreme south, a major
transform fault A transform fault or transform boundary, is a fault along a plate boundary where the motion is predominantly horizontal. It ends abruptly where it connects to another plate boundary, either another transform, a spreading ridge, or a subducti ...
separates
Tierra del Fuego Tierra del Fuego (, ; Spanish for "Land of the Fire", rarely also Fireland in English) is an archipelago off the southernmost tip of the South American mainland, across the Strait of Magellan. The archipelago consists of the main island, Isla ...
from the small Scotia Plate. Across the wide Drake Passage lie the mountains of the Antarctic Peninsula south of the Scotia Plate which appear to be a continuation of the Andes chain. The regions immediately east of the Andes experience a series of changes resulting from the Andean orogeny. Parts of the Sunsás Orogen in Amazonian craton disappeared from the surface of earth being overridden by the Andes. The
Sierras de Córdoba The Sierras de Córdoba is a mountain range in central Argentina, located between the Pampas to the east and south and the Chaco to the north and east. Most of the range is located in Córdoba Province, except for the southwestern margin whic ...
, where the effects of the ancient Pampean orogeny can be observed, owe their modern uplift and relief to the Andean orogeny in the
Tertiary Tertiary ( ) is a widely used but obsolete term for the geologic period from 66 million to 2.6 million years ago. The period began with the demise of the non- avian dinosaurs in the Cretaceous–Paleogene extinction event, at the start ...
. Further south in southern
Patagonia Patagonia () refers to a geographical region that encompasses the southern end of South America, governed by Argentina and Chile. The region comprises the southern section of the Andes Mountains with lakes, fjords, temperate rainforests, and ...
the onset of the Andean orogeny caused the Magallanes Basin to evolve from being an extensional
back-arc basin A back-arc basin is a type of geologic basin, found at some convergent plate boundaries. Presently all back-arc basins are submarine features associated with island arcs and subduction zones, with many found in the western Pacific Ocean. Most ...
in the
Mesozoic The Mesozoic Era ( ), also called the Age of Reptiles, the Age of Conifers, and colloquially as the Age of the Dinosaurs is the second-to-last era of Earth's geological history, lasting from about , comprising the Triassic, Jurassic and Creta ...
to being a compressional foreland basin in the
Cenozoic The Cenozoic ( ; ) is Earth's current geological era, representing the last 66million years of Earth's history. It is characterised by the dominance of mammals, birds and flowering plants, a cooling and drying climate, and the current configu ...
.


Volcanism

The Andes range has many active volcanoes distributed in four volcanic zones separated by areas of inactivity. The Andean volcanism is a result of subduction of the Nazca Plate and Antarctic Plate underneath the South American Plate. The belt is subdivided into four main volcanic zones that are separated from each other by volcanic gaps. The volcanoes of the belt are diverse in terms of activity style, products and morphology. While some differences can be explained by which volcanic zone a volcano belongs to, there are significant differences inside volcanic zones and even between neighbouring volcanoes. Despite being a type location for calc-alkalic and subduction volcanism, the Andean Volcanic Belt has a large range of volcano-tectonic settings, such as rift systems and extensional zones, transpressional faults, subduction of mid-ocean ridges and
seamount A seamount is a large geologic landform that rises from the ocean floor that does not reach to the water's surface (sea level), and thus is not an island, islet or cliff-rock. Seamounts are typically formed from extinct volcanoes that rise a ...
chains apart from a large range of crustal thicknesses and
magma Magma () is the molten or semi-molten natural material from which all igneous rocks are formed. Magma is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natura ...
ascent paths, and different amount of crustal assimilations.


Ore deposits and evaporates

The Andes Mountains host large ore and
salt Salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts; salt in the form of a natural crystalline mineral is known as rock salt or halite. Salt is present in vast quanti ...
deposits and some of their eastern fold and thrust belt acts as traps for commercially exploitable amounts of
hydrocarbon In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. Hydrocarbons are examples of group 14 hydrides. Hydrocarbons are generally colourless and hydrophobic, and their odors are usually weak or ...
s. In the forelands of the
Atacama Desert The Atacama Desert ( es, Desierto de Atacama) is a desert plateau in South America covering a 1,600 km (990 mi) strip of land on the Pacific coast, west of the Andes Mountains. The Atacama Desert is the driest nonpolar desert in the ...
some of the largest porphyry copper mineralizations occur making Chile and Peru the first- and second-largest exporters of
copper Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish ...
in the world. Porphyry copper in the western slopes of the Andes has been generated by hydrothermal fluids (mostly water) during the cooling of plutons or volcanic systems. The porphyry mineralization further benefited from the dry climate that let them largely out of the disturbing actions of meteoric water. The dry climate in the central western Andes has also led to the creation of extensive saltpeter deposits which were extensively mined until the invention of synthetic nitrates. Yet another result of the dry climate are the salars of Atacama and
Uyuni Uyuni (Aymara, ''uyu'' pen (enclosure), yard, cemetery, ''-ni'' a suffix to indicate ownership, "the one that has got a pen", "the one with a pen") is a city in the southwest of Bolivia. Uyuni primarily serves as a gateway for tourists visiting t ...
, the first one being the largest source of
lithium Lithium (from el, λίθος, lithos, lit=stone) is a chemical element with the symbol Li and atomic number 3. It is a soft, silvery-white alkali metal. Under standard conditions, it is the least dense metal and the least dense solid ...
today and the second the world's largest reserve of the element. Early Mesozoic and
Neogene The Neogene ( ), informally Upper Tertiary or Late Tertiary, is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago (Mya) to the beginning of the present Quaternary Period Mya. ...
plutonism in Bolivia's Cordillera Central created the Bolivian tin belt as well as the famous, now depleted, deposits of Cerro Rico de Potosí.


History

The Andes Mountains, initially inhabited by
hunter-gatherers A traditional hunter-gatherer or forager is a human living an ancestrally derived lifestyle in which most or all food is obtained by foraging, that is, by gathering food from local sources, especially edible wild plants but also insects, fungi ...
, experienced the development of
agriculture Agriculture or farming is the practice of cultivating plants and livestock. Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled peop ...
and rise of politically centralised civilizations, which culminated in the establishment of the century-long
Inca Empire The Inca Empire (also known as the Incan Empire and the Inka Empire), called ''Tawantinsuyu'' by its subjects, ( Quechua for the "Realm of the Four Parts",  "four parts together" ) was the largest empire in pre-Columbian America. The adm ...
. This all changed in the 16th century, when the Spanish conquistadors colonized the mountains in the advance of the
mining Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit. The exploitation of these deposits for raw material is based on the economic ...
economy. In tide of anti-imperialist nationalism, the Andes became the scene of a series of independence wars in the 19th century when rebel forces swept through the region to overthrow Spanish colonial rule. Since then, many former Spanish territories have become five independent Andean states.


Climate and hydrology

The climate in the Andes varies greatly depending on latitude, altitude, and proximity to the sea. Temperature, atmospheric pressure and humidity decrease in higher elevations. The southern section is rainy and cool, the central section is dry. The northern Andes are typically rainy and warm, with an average temperature of in Colombia. The climate is known to change drastically in rather short distances.
Rainforest Rainforests are characterized by a closed and continuous tree canopy, moisture-dependent vegetation, the presence of epiphytes and lianas and the absence of wildfire. Rainforest can be classified as tropical rainforest or temperate rainfo ...
s exist just kilometres away from the snow-covered peak Cotopaxi. The mountains have a large effect on the temperatures of nearby areas. The
snow line The climatic snow line is the boundary between a snow-covered and snow-free surface. The actual snow line may adjust seasonally, and be either significantly higher in elevation, or lower. The permanent snow line is the level above which snow wil ...
depends on the location. It is at between in the tropical Ecuadorian, Colombian, Venezuelan, and northern Peruvian Andes, rising to in the drier mountains of southern Peru south to northern Chile south to about 30°S before descending to on Aconcagua at 32°S, at 40°S, at 50°S, and only in
Tierra del Fuego Tierra del Fuego (, ; Spanish for "Land of the Fire", rarely also Fireland in English) is an archipelago off the southernmost tip of the South American mainland, across the Strait of Magellan. The archipelago consists of the main island, Isla ...
at 55°S; from 50°S, several of the larger glaciers descend to sea level. The Andes of Chile and
Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, t ...
can be divided into two climatic and glaciological zones: the
Dry Andes 200px, Map of the climatic regions of the Andes. The Dry Andes are shown in yellow. The Andes áridos) is a climatic and glaciology">glaciological subregion of the Andes. Together with the Wet Andes it is one of the two subregions of the Argentin ...
and the Wet Andes. Since the Dry Andes extend from the latitudes of
Atacama Desert The Atacama Desert ( es, Desierto de Atacama) is a desert plateau in South America covering a 1,600 km (990 mi) strip of land on the Pacific coast, west of the Andes Mountains. The Atacama Desert is the driest nonpolar desert in the ...
to the area of Maule River, precipitation is more sporadic and there are strong temperature oscillations. The line of equilibrium may shift drastically over short periods of time, leaving a whole glacier in the
ablation Ablation ( la, ablatio – removal) is removal or destruction of something from an object by vaporization, chipping, erosive processes or by other means. Examples of ablative materials are described below, and include spacecraft material for a ...
area or in the accumulation area. In the high Andes of Central Chile and
Mendoza Province Mendoza, officially Province of Mendoza, is a province of Argentina, in the western central part of the country in the Cuyo region. It borders San Juan to the north, La Pampa and Neuquén to the south, San Luis to the east, and the republic ...
, rock glaciers are larger and more common than glaciers; this is due to the high exposure to
solar radiation Solar irradiance is the power per unit area ( surface power density) received from the Sun in the form of electromagnetic radiation in the wavelength range of the measuring instrument. Solar irradiance is measured in watts per square metre ...
. In these regions glaciers occur typically at higher altitudes than rock glaciers. The lowest active rock glacier occur at 900 m a.s.l. in Aconcagua. Though precipitation increases with the height, there are semiarid conditions in the nearly highest mountains of the Andes. This dry steppe climate is considered to be typical of the subtropical position at 32–34° S. The valley bottoms have no woods, just dwarf scrub. The largest glaciers, for example the Plomo glacier and the Horcones glaciers, do not even reach in length and have an only insignificant ice thickness. At glacial times, however, c. 20,000 years ago, the glaciers were over ten times longer. On the east side of this section of the Mendozina Andes, they flowed down to and on the west side to about above sea level.Kuhle, M. (2011): The High-Glacial (Last Glacial Maximum) Glacier Cover of the Aconcagua Group and Adjacent Massifs in the Mendoza Andes (South America) with a Closer Look at Further Empirical Evidence. Development in Quaternary Science, Vol. 15 (Quaternary Glaciation – Extent and Chronology, A Closer Look, Eds: Ehlers, J.; Gibbard, P.L.; Hughes, P.D.), 735–738. (Elsevier B.V., Amsterdam). The massifs of Cerro Aconcagua (), Cerro Tupungato () and Nevado Juncal () are tens of kilometres away from each other and were connected by a joint ice stream network. The Andes' dendritic glacier arms, i.e. components of valley glaciers, were up to long, over thick and overspanned a vertical distance of . The climatic glacier snowline (ELA) was lowered from to at glacial times.


Flora

The Andean region cuts across several
natural Nature, in the broadest sense, is the physical world or universe. "Nature" can refer to the phenomena of the physical world, and also to life in general. The study of nature is a large, if not the only, part of science. Although humans are ...
and floristic regions, due to its extension, from Caribbean Venezuela to cold, windy and wet
Cape Horn Cape Horn ( es, Cabo de Hornos, ) is the southernmost headland of the Tierra del Fuego archipelago of southern Chile, and is located on the small Hornos Island. Although not the most southerly point of South America (which are the Diego Ramí ...
passing through the hyperarid Atacama Desert.
Rainforest Rainforests are characterized by a closed and continuous tree canopy, moisture-dependent vegetation, the presence of epiphytes and lianas and the absence of wildfire. Rainforest can be classified as tropical rainforest or temperate rainfo ...
s and tropical dry forests used to encircle much of the northern Andes but are now greatly diminished, especially in the Chocó and inter-Andean valleys of Colombia. Opposite of the humid Andean slopes are the relatively dry Andean slopes in most of western Peru, Chile and Argentina. Along with several
Interandean Valles The term Interandean valles refers to those valleys located in the Andes mountains. The interandean valles comprise most of the mid-elevation areas of the "sierra" of Peru, "los valles" of Bolivia and the " Cuyo region" of Argentina. In Colombi ...
, they are typically dominated by
deciduous In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, a ...
woodland, shrub and xeric vegetation, reaching the extreme in the slopes near the virtually lifeless Atacama Desert. About 30,000 species of
vascular plants Vascular plants (), also called tracheophytes () or collectively Tracheophyta (), form a large group of land plants ( accepted known species) that have lignified tissues (the xylem) for conducting water and minerals throughout the plant. They a ...
live in the Andes, with roughly half being
endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...
to the region, surpassing the diversity of any other
hotspot Hotspot, Hot Spot or Hot spot may refer to: Places * Hot Spot, Kentucky, a community in the United States Arts, entertainment, and media Fictional entities * Hot Spot (comics), a name for the DC Comics character Isaiah Crockett * Hot Spot (Tra ...
. The small tree ''
Cinchona pubescens ''Cinchona pubescens'', also known as red cinchona and quina (Kina) ( ''Cascarilla, cinchona''; ''quina-do-amazonas, quineira''), is native to Central and South America. It is known as a medicinal plant for its bark's high quinine content- and h ...
'', a source of
quinine Quinine is a medication used to treat malaria and babesiosis. This includes the treatment of malaria due to '' Plasmodium falciparum'' that is resistant to chloroquine when artesunate is not available. While sometimes used for nocturnal leg ...
which is used to treat
malaria Malaria is a mosquito-borne infectious disease that affects humans and other animals. Malaria causes symptoms that typically include fever, tiredness, vomiting, and headaches. In severe cases, it can cause jaundice, seizures, coma, or deat ...
, is found widely in the Andes as far south as Bolivia. Other important crops that originated from the Andes are
tobacco Tobacco is the common name of several plants in the genus '' Nicotiana'' of the family Solanaceae, and the general term for any product prepared from the cured leaves of these plants. More than 70 species of tobacco are known, but the ch ...
and
potato The potato is a starchy food, a tuber of the plant ''Solanum tuberosum'' and is a root vegetable native to the Americas. The plant is a perennial in the nightshade family Solanaceae. Wild potato species can be found from the southern Un ...
es. The high-altitude ''
Polylepis ''Polylepis'' is a genus comprising 28 recognised shrub and tree species, that are endemic to the mid- and high-elevation regions of the tropical Andes. This group is unique in the rose family in that it is predominantly wind-pollinated. They are ...
'' forests and woodlands are found in the Andean areas of Colombia, Ecuador, Peru, Bolivia and Chile. These trees, by locals referred to as Queñua, Yagual and other names, can be found at altitudes of above sea level. It remains unclear if the patchy distribution of these forests and woodlands is natural, or the result of clearing which began during the Incan period. Regardless, in modern times the clearance has accelerated, and the trees are now considered to be highly
endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inv ...
, with some believing that as little as 10% of the original woodland remains.


Fauna

The Andes are rich in fauna: With almost 1,000 species, of which roughly 2/3 are
endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...
to the region, the Andes are the most important region in the world for amphibians.Tropical Andes
– biodiversityhotspots.org
The diversity of animals in the Andes is high, with almost 600 species of mammals (13% endemic), more than 1,700 species of birds (about 1/3 endemic), more than 600 species of reptile (about 45% endemic), and almost 400 species of fish (about 1/3 endemic). The vicuña and guanaco can be found living in the
Altiplano The Altiplano (Spanish for "high plain"), Collao ( Quechua and Aymara: Qullaw, meaning "place of the Qulla") or Andean Plateau, in west-central South America, is the most extensive high plateau on Earth outside Tibet. The plateau is located a ...
, while the closely related domesticated
llama The llama (; ) (''Lama glama'') is a domesticated South American camelid, widely used as a meat and pack animal by Andean cultures since the Pre-Columbian era. Llamas are social animals and live with others as a herd. Their wool is so ...
and
alpaca The alpaca (''Lama pacos'') is a species of South American camelid mammal. It is similar to, and often confused with, the llama. However, alpacas are often noticeably smaller than llamas. The two animals are closely related and can success ...
are widely kept by locals as
pack animal A pack animal, also known as a sumpter animal or beast of burden, is an individual or type of working animal used by humans as means of transporting materials by attaching them so their weight bears on the animal's back, in contrast to draft an ...
s and for their meat and
wool Wool is the textile fibre obtained from sheep and other mammals, especially goats, rabbits, and camelids. The term may also refer to inorganic materials, such as mineral wool and glass wool, that have properties similar to animal wool. ...
. The crepuscular (active during dawn and dusk) chinchillas, two threatened members of the
rodent Rodents (from Latin , 'to gnaw') are mammals of the Order (biology), order Rodentia (), which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are roden ...
order, inhabit the Andes' alpine regions.Eisenberg, J.F.; & Redford, K.H. (2000). ''Mammals of the Neotropics, Volume 3: The Central Neotropics: Ecuador, Peru, Bolivia, Brazil.'' Eisenberg, J.F.; & Redford, K.H. (1992). ''Mammals of the Neotropics, Volume 2: The Southern Cone: Chile, Argentina, Uruguay, Paraguay.'' The Andean condor, the largest bird of its kind in the
Western Hemisphere The Western Hemisphere is the half of the planet Earth that lies west of the prime meridian (which crosses Greenwich, London, United Kingdom) and east of the antimeridian. The other half is called the Eastern Hemisphere. Politically, th ...
, occurs throughout much of the Andes but generally in very low densities.Fjeldsaa, J.; & Krabbe, N. (1990). ''Birds of the High Andes: A Manual to the Birds of the Temperate Zone of the Andes and Patagonia, South America.'' Other animals found in the relatively open habitats of the high Andes include the huemul,
cougar The cougar (''Puma concolor'') is a large cat native to the Americas. Its range spans from the Canadian Yukon to the southern Andes in South America and is the most widespread of any large wild terrestrial mammal in the Western Hemisphere. I ...
, foxes in the genus '' Pseudalopex'', and, for birds, certain species of tinamous (notably members of the genus '' Nothoprocta''), Andean goose, giant coot,
flamingo Flamingos or flamingoes are a type of wading bird in the family Phoenicopteridae, which is the only extant family in the order Phoenicopteriformes. There are four flamingo species distributed throughout the Americas (including the Caribbean) ...
s (mainly associated with hypersaline lakes), lesser rhea, Andean flicker,
diademed sandpiper-plover The diademed sandpiper-plover or diademed plover (''Phegornis mitchellii'') is a Near Threatened species of bird in subfamily Charadriinae of family Charadriidae. It is found in Argentina, Bolivia, Chile, and Peru.HBW and BirdLife International ...
, miners, sierra-finches and diuca-finches.
Lake Titicaca Lake Titicaca (; es, Lago Titicaca ; qu, Titiqaqa Qucha) is a large freshwater lake in the Andes mountains on the border of Bolivia and Peru. It is often called the highest navigable lake in the world. By volume of water and by surface area ...
hosts several endemics, among them the highly endangered
Titicaca flightless grebe The Titicaca grebe (''Rollandia microptera''), also known as the Titicaca flightless grebe or short-winged grebe, is a grebe found on the altiplano of Peru and Bolivia. As its name implies, its main population occurs on Lake Titicaca. Lake Uru ...
and
Titicaca water frog ''Telmatobius culeus'', commonly known as the Titicaca water frog, is a medium-large to very large and endangered species of frog in the family Telmatobiidae. It is entirely aquatic and only found in the Lake Titicaca basin, including rivers tha ...
.Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani and Young, editors (2008). ''Threatened Amphibians of the World.'' A few species of
hummingbirds Hummingbirds are birds native to the Americas and comprise the Family (biology), biological family Trochilidae. With about 361 species and 113 genus, genera, they occur from Alaska to Tierra del Fuego, but the vast majority of the species are ...
, notably some hillstars, can be seen at altitudes above , but far higher diversities can be found at lower altitudes, especially in the humid Andean forests ("
cloud forest A cloud forest, also called a water forest, primas forest, or tropical montane cloud forest (TMCF), is a generally tropical or subtropical, evergreen, montane, moist forest characterized by a persistent, frequent or seasonal low-level cloud ...
s") growing on slopes in Colombia, Ecuador, Peru, Bolivia and far northwestern Argentina. These forest-types, which includes the Yungas and parts of the Chocó, are very rich in flora and fauna, although few large mammals exist, exceptions being the threatened
mountain tapir The mountain tapir, also known as the Andean tapir or woolly tapir (''Tapirus pinchaque'') is the smallest of the four widely recognized species of tapir. It is the only one to live outside of tropical rainforests in the wild. It is most easil ...
, spectacled bear and yellow-tailed woolly monkey. Birds of humid Andean forests include
mountain-toucan ''Andigena'', the mountain toucans, is a genus of birds in the family Ramphastidae. They are found in humid highland forests in the Andes of South America, ranging from Bolivia to Venezuela. These medium-sized toucans all have olive-brown upperp ...
s, quetzals and the Andean cock-of-the-rock, while
mixed species flock A mixed-species feeding flock, also termed a mixed-species foraging flock, mixed hunting party or informally bird wave, is a flock of usually insectivorous birds of different species that join each other and move together while foraging. These are ...
s dominated by tanagers and
furnariids Ovenbirds or furnariids are a large family of small suboscine passerine birds found from Mexico and Central to southern South America. They form the family Furnariidae. This is a large family containing around 315 species and 70 genera. The ov ...
commonly are seen – in contrast to several vocal but typically
cryptic Cryptic may refer to: In science: * Cryptic species complex, a group of species that are very difficult to distinguish from one another * Crypsis, the ability of animals to blend in to avoid observation * Cryptic era, earliest period of the Earth ...
species of wrens, tapaculos and antpittas. A number of species such as the
royal cinclodes The royal cinclodes (''Cinclodes aricomae'') is a passerine bird which breeds in the Andes of south-east Peru and adjacent Bolivia. It was formerly considered to be a subspecies of the stout-billed cinclodes ''C. excelsior''. It is 20 cm lo ...
and white-browed tit-spinetail are associated with ''Polylepis'', and consequently also threatened.


Human activity

The Andes Mountains form a north–south axis of cultural influences. A long series of cultural development culminated in the expansion of the
Inca civilization The Incas were most notable for establishing the Inca Empire in Pre-Columbian America, which was centered in modern day South America in Peru and Chile. It was about 2,500 miles from the northern to southern tip. The civilization lasted from 1 ...
and
Inca Empire The Inca Empire (also known as the Incan Empire and the Inka Empire), called ''Tawantinsuyu'' by its subjects, ( Quechua for the "Realm of the Four Parts",  "four parts together" ) was the largest empire in pre-Columbian America. The adm ...
in the central Andes during the 15th century. The Incas formed this civilization through imperialistic
militarism Militarism is the belief or the desire of a government or a people that a state should maintain a strong military capability and to use it aggressively to expand national interests and/or values. It may also imply the glorification of the mili ...
as well as careful and meticulous governmental management. The government sponsored the construction of aqueducts and roads in addition to preexisting installations. Some of these constructions are still in existence today. Devastated by European diseases and by
civil war A civil war or intrastate war is a war between organized groups within the same state (or country). The aim of one side may be to take control of the country or a region, to achieve independence for a region, or to change government polic ...
, the Incas were defeated in 1532 by an alliance composed of tens of thousands of allies from nations they had subjugated (e.g. Huancas, Chachapoyas, Cañaris) and a small army of 180 Spaniards led by
Francisco Pizarro Francisco Pizarro González, Marquess of the Atabillos (; ;  – 26 June 1541) was a Spanish conquistador, best known for his expeditions that led to the Spanish conquest of Peru. Born in Trujillo, Cáceres, Trujillo, Spain to a poor fam ...
. One of the few Inca sites the Spanish never found in their conquest was
Machu Picchu Machu Picchu is a 15th-century Inca citadel located in the Eastern Cordillera of southern Peru on a mountain range.UNESCO World Heritage Centre. It is located in the Machupicchu District within Urubamba Province above the Sacred Valley, whi ...
, which lay hidden on a peak on the eastern edge of the Andes where they descend to the Amazon. The main surviving languages of the Andean peoples are those of the Quechua and
Aymara language Aymara (; also ) is an Aymaran language spoken by the Aymara people of the Bolivian Andes. It is one of only a handful of Native American languages with over one million speakers.The other native American languages with more than one millio ...
families. Woodbine Parish and
Joseph Barclay Pentland Joseph Barclay Pentland (17 January 1797Joseph Barclay Pentland
in ''Dictionary of U ...
surveyed a large part of the Bolivian Andes from 1826 to 1827.


Cities

In modern times, the largest cities in the Andes are
Bogotá Bogotá (, also , , ), officially Bogotá, Distrito Capital, abbreviated Bogotá, D.C., and formerly known as Santa Fe de Bogotá (; ) during the Spanish period and between 1991 and 2000, is the capital city of Colombia, and one of the largest ...
, with a population of about eight million,
Santiago Santiago (, ; ), also known as Santiago de Chile, is the capital and largest city of Chile as well as one of the largest cities in the Americas. It is the center of Chile's most densely populated region, the Santiago Metropolitan Region, who ...
,
Medellín Medellín ( or ), officially the Municipality of Medellín ( es, Municipio de Medellín), is the second-largest city in Colombia, after Bogotá, and the capital of the department of Antioquia. It is located in the Aburrá Valley, a central re ...
,
Cali Santiago de Cali (), or Cali, is the capital of the Valle del Cauca department, and the most populous city in southwest Colombia, with 2,227,642 residents according to the 2018 census. The city spans with of urban area, making Cali the secon ...
, and
Quito Quito (; qu, Kitu), formally San Francisco de Quito, is the capital city, capital and largest city of Ecuador, with an estimated population of 2.8 million in its urban area. It is also the capital of the province of Pichincha Province, Pichincha ...
.
Lima Lima ( ; ), originally founded as Ciudad de Los Reyes (City of The Kings) is the capital and the largest city of Peru. It is located in the valleys of the Chillón, Rímac and Lurín Rivers, in the desert zone of the central coastal part of t ...
is a coastal city adjacent to the Andes and is the largest city of all Andean countries. It is the seat of the Andean Community of Nations.
La Paz La Paz (), officially known as Nuestra Señora de La Paz (Spanish pronunciation: ), is the seat of government of the Plurinational State of Bolivia. With an estimated 816,044 residents as of 2020, La Paz is the third-most populous city in Bo ...
,
Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...
's seat of government, is the highest capital city in the world, at an elevation of approximately . Parts of the La Paz conurbation, including the city of El Alto, extend up to . Other cities in or near the Andes include Bariloche, Catamarca, Jujuy, Mendoza,
Salta Salta () is the capital and largest city in the Argentine province of the same name. With a population of 618,375 according to the 2010 census, it is also the 7th most-populous city in Argentina. The city serves as the cultural and economic ce ...
,
San Juan San Juan, Spanish for Saint John, may refer to: Places Argentina * San Juan Province, Argentina * San Juan, Argentina, the capital of that province * San Juan, Salta, a village in Iruya, Salta Province * San Juan (Buenos Aires Underground), ...
, and Tucumán in Argentina; Calama and Rancagua in Chile;
Cochabamba Cochabamba ( ay, Quchapampa; qu, Quchapampa) is a city and municipality in central Bolivia in a valley in the Andes mountain range. It is the capital of the Cochabamba Department and the fourth largest city in Bolivia, with a population of 6 ...
, Oruro, Potosí,
Sucre Sucre () is the capital of Bolivia, the capital of the Chuquisaca Department and the 6th most populated city in Bolivia. Located in the south-central part of the country, Sucre lies at an elevation of . This relatively high altitude gives the ...
, Sacaba, Tarija, and Yacuiba in Bolivia;
Arequipa Arequipa (; Aymara and qu, Ariqipa) is a city and capital of province and the eponymous department of Peru. It is the seat of the Constitutional Court of Peru and often dubbed the "legal capital of Peru". It is the second most populated cit ...
,
Cajamarca Cajamarca (), also known by the Quechua name, ''Kashamarka'', is the capital and largest city of the Cajamarca Region as well as an important cultural and commercial center in the northern Andes. It is located in the northern highlands of Peru ...
,
Cusco Cusco, often spelled Cuzco (; qu, Qusqu ()), is a city in Southeastern Peru near the Urubamba Valley of the Andes mountain range. It is the capital of the Cusco Region and of the Cusco Province. The city is the seventh most populous in Peru ...
, Huancayo, Huánuco, Huaraz, Juliaca, and Puno in Peru; Ambato, Cuenca,
Ibarra Ibarra (which means ''alluvial plain'' in Basque) may refer to: Places * Ibarra Canton, Ecuador ** Ibarra, Ecuador, the capital of Imbabura Province and the canton *** Roman Catholic Diocese of Ibarra, inside the city * Ibarra, Gipuzkoa, a lo ...
, Latacunga, Loja, Riobamba and Tulcán in Ecuador;
Armenia Armenia (), , group=pron officially the Republic of Armenia,, is a landlocked country in the Armenian Highlands of Western Asia.The UNbr>classification of world regions places Armenia in Western Asia; the CIA World Factbook , , and ...
,
Cúcuta Cúcuta (), officially San José de Cúcuta, is a Colombian municipality, capital of the department of Norte de Santander and nucleus of the Metropolitan Area of Cúcuta. The city is located in the homonymous valley, at the foot of the Easte ...
, Bucaramanga, Duitama,
Ibagué Ibagué () (referred to as San Bonifacio de Ibagué del Valle de las Lanzas during the Spanish period) is the capital of Tolima, one of the 32 departments that make up the Republic of Colombia. The city is located in the center of the country ...
, Ipiales, Manizales, Palmira, Pasto,
Pereira Pereira (Portuguese and Galician for "pear tree") may refer to: People * Pereira (surname) Places *Brazil **Pereira (Bahia) (est. 1534) in the present-day Barra neighborhood of Salvador in Bahia **Pereira Barreto, municipality in São Paulo **Pe ...
, Popayán,
Sogamoso Sogamoso () is a city in the department of Boyacá of Colombia. It is the capital of the Sugamuxi Province, named after the original Sugamuxi. Sogamoso is nicknamed "City of the Sun", based on the original Muisca tradition of pilgrimage and ador ...
, Tunja, and Villavicencio in Colombia; and Barquisimeto, La Grita, Mérida, San Cristóbal, Tovar, Trujillo, and
Valera Valera is a city in Trujillo State in Venezuela, situated between the rivers Momboy and Motatán. The mayor is José Karkom, who has had that post since 2013. The city is home to Italian, Portuguese, Chinese, Colombian and Spanish commun ...
in Venezuela. The cities of
Caracas Caracas (, ), officially Santiago de León de Caracas, abbreviated as CCS, is the capital and largest city of Venezuela, and the center of the Metropolitan Region of Caracas (or Greater Caracas). Caracas is located along the Guaire River in the ...
,
Valencia Valencia ( va, València) is the capital of the autonomous community of Valencia and the third-most populated municipality in Spain, with 791,413 inhabitants. It is also the capital of the province of the same name. The wider urban area al ...
, and Maracay are in the Venezuelan Coastal Range, which is a debatable extension of the Andes at the northern extremity of South America.


Transportation

Cities and large towns are connected with
asphalt Asphalt, also known as bitumen (, ), is a sticky, black, highly viscous liquid or semi-solid form of petroleum. It may be found in natural deposits or may be a refined product, and is classed as a pitch. Before the 20th century, the term ...
-paved roads, while smaller towns are often connected by dirt roads, which may require a four-wheel-drive vehicle. The rough terrain has historically put the costs of building
highway A highway is any public or private road or other public way on land. It is used for major roads, but also includes other public roads and public tracks. In some areas of the United States, it is used as an equivalent term to controlled-access ...
s and
railroad Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in tracks. In contrast to road transport, where the vehicles run on a pre ...
s that cross the Andes out of reach of most neighboring countries, even with modern
civil engineering Civil engineering is a professional engineering discipline that deals with the design, construction, and maintenance of the physical and naturally built environment, including public works such as roads, bridges, canals, dams, airports, sewa ...
practices. For example, the main crossover of the Andes between Argentina and Chile is still accomplished through the Paso Internacional Los Libertadores. Only recently the ends of some highways that came rather close to one another from the east and the west have been connected. Much of the transportation of passengers is done via aircraft. However, there is one railroad that connects Chile with Peru via the Andes, and there are others that make the same connection via southern Bolivia. See railroad maps of that region. There are multiple highways in Bolivia that cross the Andes. Some of these were built during a period of war between Bolivia and
Paraguay Paraguay (; ), officially the Republic of Paraguay ( es, República del Paraguay, links=no; gn, Tavakuairetã Paraguái, links=si), is a landlocked country in South America. It is bordered by Argentina to the south and southwest, Brazil to th ...
, in order to transport Bolivian troops and their supplies to the war front in the lowlands of southeastern Bolivia and western Paraguay. For decades, Chile claimed ownership of land on the eastern side of the Andes. However, these claims were given up in about 1870 during the War of the Pacific between Chile and the allied Bolivia and Peru, in a diplomatic deal to keep Peru out of the war. The Chilean Army and
Chilean Navy The Chilean Navy ( es, Armada de Chile) is the naval warfare service branch of the Chilean Armed Forces. It is under the Ministry of National Defense. Its headquarters are at Edificio Armada de Chile, Valparaiso. History Origins and the Wa ...
defeated the combined forces of Bolivia and Peru, and Chile took over Bolivia's only province on the Pacific Coast, some land from Peru that was returned to Peru decades later. Bolivia has been a completely
landlocked A landlocked country is a country that does not have territory connected to an ocean or whose coastlines lie on endorheic basins. There are currently 44 landlocked countries and 4 landlocked de facto states. Kazakhstan is the world's largest ...
country ever since. It mostly uses
seaport A port is a maritime law, maritime facility comprising one or more Wharf, wharves or loading areas, where ships load and discharge Affreightment, cargo and passengers. Although usually situated on a sea coast or estuary, ports can a ...
s in eastern Argentina and
Uruguay Uruguay (; ), officially the Oriental Republic of Uruguay ( es, República Oriental del Uruguay), is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast; while bordering ...
for international trade because its diplomatic relations with Chile have been suspended since 1978. Because of the tortuous terrain in places, villages and towns in the mountains—to which travel via motorized vehicles is of little use—are still located in the high Andes of Chile, Bolivia, Peru, and
Ecuador Ecuador ( ; ; Quechuan languages, Quechua: ''Ikwayur''; Shuar language, Shuar: ''Ecuador'' or ''Ekuatur''), officially the Republic of Ecuador ( es, República del Ecuador, which literally translates as "Republic of the Equator"; Quechuan ...
. Locally, the relatives of the camel, the
llama The llama (; ) (''Lama glama'') is a domesticated South American camelid, widely used as a meat and pack animal by Andean cultures since the Pre-Columbian era. Llamas are social animals and live with others as a herd. Their wool is so ...
, and the
alpaca The alpaca (''Lama pacos'') is a species of South American camelid mammal. It is similar to, and often confused with, the llama. However, alpacas are often noticeably smaller than llamas. The two animals are closely related and can success ...
continue to carry out important uses as pack animals, but this use has generally diminished in modern times. Donkeys, mules, and horses are also useful.


Agriculture

The ancient peoples of the Andes such as the Incas have practiced
irrigation Irrigation (also referred to as watering) is the practice of applying controlled amounts of water to land to help grow crops, landscape plants, and lawns. Irrigation has been a key aspect of agriculture for over 5,000 years and has been dev ...
techniques for over 6,000 years. Because of the mountain slopes, terracing has been a common practice. Terracing, however, was only extensively employed after Incan imperial expansions to fuel their expanding realm. The
potato The potato is a starchy food, a tuber of the plant ''Solanum tuberosum'' and is a root vegetable native to the Americas. The plant is a perennial in the nightshade family Solanaceae. Wild potato species can be found from the southern Un ...
holds a very important role as an internally consumed staple crop.
Maize Maize ( ; ''Zea mays'' subsp. ''mays'', from es, maíz after tnq, mahiz), also known as corn ( North American and Australian English), is a cereal grain first domesticated by indigenous peoples in southern Mexico about 10,000 years ago. ...
was also an important crop for these people, and was used for the production of chicha, important to Andean native people. Currently,
tobacco Tobacco is the common name of several plants in the genus '' Nicotiana'' of the family Solanaceae, and the general term for any product prepared from the cured leaves of these plants. More than 70 species of tobacco are known, but the ch ...
,
cotton Cotton is a soft, fluffy staple fiber that grows in a boll, or protective case, around the seeds of the cotton plants of the genus '' Gossypium'' in the mallow family Malvaceae. The fiber is almost pure cellulose, and can contain minor p ...
and
coffee Coffee is a drink prepared from roasted coffee beans. Darkly colored, bitter, and slightly acidic, coffee has a stimulating effect on humans, primarily due to its caffeine content. It is the most popular hot drink in the world. Seeds of ...
are the main export crops. Coca, despite eradication programmes in some countries, remains an important crop for legal local use in a mildly stimulating herbal tea, and, both controversially and illegally, for the production of
cocaine Cocaine (from , from , ultimately from Quechua: ''kúka'') is a central nervous system (CNS) stimulant mainly used recreationally for its euphoric effects. It is primarily obtained from the leaves of two Coca species native to South Am ...
.


Irrigation

In unirrigated land,
pasture Pasture (from the Latin ''pastus'', past participle of ''pascere'', "to feed") is land used for grazing. Pasture lands in the narrow sense are enclosed tracts of farmland, grazed by domesticated livestock, such as horses, cattle, sheep, or s ...
is the most common type of land use. In the rainy season (summer), part of the rangeland is used for cropping (mainly potatoes, barley, broad beans and wheat). Irrigation is helpful in advancing the sowing data of the summer crops which guarantees an early yield in the period of food shortage. Also, by early sowing, maize can be cultivated higher up in the mountains (up to ). In addition, it makes cropping in the dry season (winter) possible and allows the cultivation of frost-resistant vegetable crops like
onion An onion (''Allium cepa'' L., from Latin ''cepa'' meaning "onion"), also known as the bulb onion or common onion, is a vegetable that is the most widely cultivated species of the genus ''Allium''. The shallot is a botanical variety of the oni ...
and carrot.


Mining

The Andes rose to fame for their mineral wealth during the
Spanish conquest of South America Spain began colonizing the Americas under the Crown of Castile and was spearheaded by the Spanish . The Americas were invaded and incorporated into the Spanish Empire, with the exception of Brazil, British America, and some small regions of ...
. Although Andean Amerindian peoples crafted ceremonial jewelry of gold and other metals, the mineralizations of the Andes were first mined on a large scale after the Spanish arrival. Potosí in present-day
Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...
and Cerro de Pasco in Peru were among the principal mines of the Spanish Empire in the New World.
Río de la Plata The Río de la Plata (, "river of silver"), also called the River Plate or La Plata River in English, is the estuary formed by the confluence of the Uruguay River and the Paraná River at Punta Gorda. It empties into the Atlantic Ocean and f ...
and
Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, t ...
derive their names from the silver of Potosí. Currently, mining in the Andes of
Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the eas ...
and
Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...
places these countries as the first and second major producers of
copper Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish ...
in the world.
Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...
also contains the 4th largest goldmine in the world: the Yanacocha. The Bolivian Andes produce principally tin although historically silver mining had a huge impact on the
economy An economy is an area of the production, distribution and trade, as well as consumption of goods and services. In general, it is defined as a social domain that emphasize the practices, discourses, and material expressions associated with t ...
of 17th century Europe. There is a long history of mining in the Andes, from the Spanish
silver Silver is a chemical element with the Symbol (chemistry), symbol Ag (from the Latin ', derived from the Proto-Indo-European wikt:Reconstruction:Proto-Indo-European/h₂erǵ-, ''h₂erǵ'': "shiny" or "white") and atomic number 47. A soft, whi ...
mines in Potosí in the 16th century to the vast current porphyry copper deposits of Chuquicamata and Escondida in Chile and Toquepala in Peru. Other metals including iron, gold, and tin in addition to non-metallic resources are important.


Peaks

This list contains some of the major peaks in the Andes mountain range. The highest peak is Aconcagua of Argentina (see below).


Argentina

* Aconcagua, * Cerro Bonete, * Galán, * Mercedario, * Pissis,


Border between Argentina and Chile

*
Cerro Bayo Cerro Bayo is a mountain of the Andes range located 9 km from the town Villa La Angostura, Neuquén Province, Argentina, within the Valdivian temperate rain forests, in an area with numerous lakes. The mountain hosts a ski area with 25 ...
, *
Cerro Fitz Roy 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.Patagonia Patagonia () refers to a geographical region that encompasses the southern end of South America, governed by Argentina and Chile. The region comprises the southern section of the Andes Mountains with lakes, fjords, temperate rainforests, and ...
, also known as Cerro Chaltén *
Cerro Escorial 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 crater forms its summit area. Lava flows are found on the Chilean and smaller o ...
, *
Cordón del Azufre Cordón del Azufre is a small, inactive complex volcano located in the Central Andes, at the border of Argentina and Chile. Geology and geomorphology The volcano lies at the border between Argentina and Chile and contains a series of craters ...
, * Falso Azufre, * Incahuasi, *
Lastarria Lastarria is a high stratovolcano that lies on the border between Chile and Argentina. It is remote and the surroundings are uninhabited but can be reached through an unpaved road. The volcano is part of the Central Volcanic Zone, one of the f ...
, * Llullaillaco, * Maipo, * Marmolejo, * Ojos del Salado, * Olca, * Sierra Nevada de Lagunas Bravas, * Socompa, * Nevado Tres Cruces, (south summit) (III Region) * Tronador, * Tupungato, * Nacimiento,


Bolivia

*
Janq'u Uma Ancohuma or Janq'u Uma (Aymara ''janq'u'' white, ''uma'' water, "white water", also spelled Janq'uma, other spellings, ''Jankho Uma'', ''Jankhouma'') is the third highest mountain in Bolivia (after Sajama and Illimani). It is located in the no ...
, * Cabaraya, * Chacaltaya, * Wayna Potosí, * Illampu, * Illimani, * Laram Q'awa, *
Macizo de Pacuni Paquni (Aymara ''paqu'' a kind of edible herb, ''-ni'' a suffix, "the one with the ''paqu'' herbs", Hispanicized spelling ''Pacuni'') is a mountain in the Potosí Department of Bolivia. It is located in the Antonio Quijarro Province Antonio ...
, * Nevado Anallajsi, * Nevado Sajama, *
Patilla Pata Patilla Pata is a stratovolcano in the Oruro Department in Bolivia. It is situated in the Sajama Province, in the west of the Curahuara de Carangas Municipality, at the border with Chile. Patilla Pata lies south-west of the mountain Jisk'a Kunturir ...
, * Tata Sabaya,


Border between Bolivia and Chile

* Acotango, *
Michincha Michincha is a stratovolcano on the border of Bolivia and Chile. It is part of an east–west trending ridge of stratovolcanoes. To its east lies Olca Olca is a stratovolcano on the border of Chile and Bolivia. It lies in the middle of a 15&nb ...
, * Iru Phutunqu, * Licancabur, * Olca, * Parinacota, * Paruma, * Pomerape,


Chile

*
Monte San Valentin Monte may refer to: Places Argentina * Argentine Monte, an ecoregion * Monte Desert * Monte Partido, a ''partido'' in Buenos Aires Province Italy * Monte Bregagno * Monte Cassino * Montecorvino (disambiguation) * Montefalcione Portugal * Mont ...
, * Cerro Paine Grande, * Cerro Macá, c. * Monte Darwin, c. *
Volcan Hudson Mount Hudson ( es, Volcán Hudson, es, Monte Hudson, label=none) is a stratovolcano in southern Chile, and the site of one of the largest eruptions in the twentieth century. The mountain itself is covered by a glacier. There is a caldera at the ...
, c. * Cerro Castillo Dynevor, c. *
Mount Tarn Mount Tarn is a small mountain located on the southernmost part of the Strait of Magellan, in Brunswick Peninsula, about 70 km south of Punta Arenas, Chile. It is in the southern extreme of continental Chile very close to Cape Froward, s ...
, c. * Polleras, c. * Acamarachi, c.


Colombia

* Nevado del Huila, * Nevado del Ruiz, * Nevado del Tolima, * Pico Pan de Azúcar, * Ritacuba Negro, * Nevado del Cumbal, *
Cerro Negro de Mayasquer Cerro Negro de Mayasquer is a volcano on the border of Colombia and Ecuador. It lies north-west of the volcano Chiles, and the two peaks are considered part of the same Chiles-Cerro Negro volcanic complex. These volcanoes, together with Cumbal a ...
, * Ritacuba Blanco, *
Nevado del Quindío The Nevado del Quindío is an inactive volcano located in the Central Cordillera of the Andes in central Colombia. The summit marks the tripoint of the departments of Risaralda, Quindío and Tolima, and is also the highest point of the depart ...
, * Puracé, * Santa Isabel, *
Doña Juana Doña Juana ( es, Volcán Doña Juana) is a stratovolcano, located within the Doña Juana-Cascabel Volcanic Complex National Natural Park ( es, Parque Nacional Natural Complejo Volcánico Doña Juana-Cascabel) in Nariño, Colombia. With a ...
, * Galeras, * Azufral,


Ecuador

* Antisana, * Cayambe, * Chiles, * Chimborazo, * Corazón, * Cotopaxi, * El Altar, *
Illiniza The Illinizas are a pair of volcanic mountains that are located in the north of Latacunga, Cotopaxi, Ecuador. They are located in the Illinizas Ecological Reserve ( es, Reserva Ecológica Los Illinizas). These twin mountains are separated by a ...
, * Pichincha, *
Quilotoa Quilotoa () is a water-filled crater lake and the most western volcano in the Ecuadorian Andes. The -wide caldera was formed by the collapse of this dacite volcano following a catastrophic VEI-6 eruption about 800 years ago, which produced pyroc ...
, * Reventador, * Sangay, * Tungurahua,


Peru

* Alpamayo, * Artesonraju, *
Carnicero Carnicero is an occupational surname literally meaning butcher, slaughterer in Spanish. Notable people with the surname include: * Antonio Carnicero, Spanish painter *Alejandro Carnicero Alejandro Carnicero (Íscar, 1693 - Madrid, 1756) was a S ...
, * Chumpe, * Coropuna, * El Misti, * El Toro, * Huandoy, * Huascarán, * Jirishanca, *
Pumasillo Pumasillo (possibly from Quechua ''puma'' cougar, puma, ''sillu'' claw, "puma claw") is a mountain in the Vilcabamba mountain range in the Andes of Peru, about 5,991 m (19,656 ft) high. Pumasillo or Sacsarayoc also refers to the whole ...
, *
Rasac Rasac (possibly Quechua for toad) is a mountain in the Huayhuash mountain range in west central Peru, part of the Andes. It has a summit elevation of , although other sources cite a height of . Rasac is a long, relatively squat mountain on t ...
, *
Rondoy Rondoy (possibly from Quechua ''runtuy'': "to hail" or "to lay an egg") is a mountain in the north of the Huayhuash mountain range in the Andes of Peru. It is located in the Ancash Region, Bolognesi Province, Pacllón District, and in the ...
, *
Sarapo Sarapo is a mountain in the Huayhuash mountain range in the Andes of Peru, about high. It is located in the Huánuco Region, Lauricocha Province, Jesús District as well as in the Lima Region, Cajatambo Province, in the districts Cajata ...
, * Salcantay, *
Seria Norte Seria () is a town in Belait District, Brunei, about west from the country's capital Bandar Seri Begawan. The total population was 3,625 in 2016. It was where oil was first struck in Brunei in 1929 and has since become a centre for the countr ...
, *
Siula Grande Siula Grande is a mountain in the Huayhuash mountain range in the Peruvian Andes. It is high and has a subpeak, Siula Chico, high. __NOTOC__ ''Touching the Void'' ascent In 1985 Siula Grande was climbed by Joe Simpson and Simon Yates. Altho ...
, *
Huaytapallana Huaytapallana (possibly from in the Quechua spelling ''Waytapallana''; ''wayta'' wild flower, a little bunch of flowers, ''pallay'' to collect, ''pallana'' an instrument to collect fruit / collectable, ''Waytapallana'' "a place where you collec ...
, * Yerupaja, *
Yerupaja Chico Yerupaja Chico is a mountain in Peru. Yerupaja Chicho rises and neighboring Yerupaja rises . The names' literal translations are yerupaja – smaller and yerupaja – larger. They are two peaks in the Peruvian Andes. They can be viewed from ab ...
,


Venezuela

* Pico Bolívar, * Pico Humboldt, *
Pico Bonpland Pico Bonpland is Venezuela's third highest peak, at 4,883 metres above sea level. It is located in the Sierra Nevada de Merida, in the Venezuelan Andes of ( Mérida State). The peak with its sister peak Pico Humboldt, and the surrounding páramo ...
, *
Pico La Concha Pico La Concha is a mountain in the Andes of Venezuela. It has a height of 4,922 metres. See also *List of mountains in the Andes A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizat ...
, * Pico Piedras Blancas, *
Pico El Águila Pico El Águila or Collado del Cóndor is the milestone that stands at the highest elevation on the Venezuelan Transandean Highway (a branch of the Pan-American Highway) in the Cordillera de Mérida of Venezuela. Nearby stands a monument, scul ...
, * Pico El Toro * Pico El León *
Pico Mucuñuque Pico Mucuñuque is a mountain in the Andes of Venezuela. It has a height of 4,609 metres. See also * List of mountains in the Andes A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organ ...


See also

* '' Andean Geology''—a
scientific journal In academic publishing, a scientific journal is a periodical publication intended to further the progress of science, usually by reporting new research. Content Articles in scientific journals are mostly written by active scientists such ...
* Andesite line * Apu (god) * Mountain passes of the Andes * List of mountain ranges


Notes


References

* * Biggar, J. (2005). ''The Andes: A Guide For Climbers''. 3rd. edition. Andes: Kirkcudbrightshire. * de Roy, T. (2005). ''The Andes: As the Condor Flies.'' Firefly books: Richmond Hill. * Fjeldså, J. & N. Krabbe (1990). ''The Birds of the High Andes.'' Zoological Museum, University of Copenhagen: * Fjeldså, J. & M. Kessler (1996). ''Conserving the biological diversity of Polylepis woodlands of the highlands on Peru and Bolivia, a contribution to sustainable natural resource management in the Andes.'' NORDECO: Copenhagen.


Bibliography

* *


External links


University of Arizona: Andes geology



Discover-peru.org: Regions and Microclimates in the Andes


{{Authority control Mountain ranges of South America * Regions of South America Physiographic divisions