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Posts tagged Andes

Milky Blue Glacial Lakes by Chile-Argentina Border

49.5S 72.6W

May 3rd, 2012 Category: Lakes, Mountains

Argentina and Chile - April 28th, 2012

The snow-capped Andes mark the border area between Chile (left) and Argentina (right). Several bright blue glacial lakes can be observed in the middle section of the image, their milky color due to rock flour suspended in their waters. The lakes are, from top to bottom, Lake O’Higgins/San Martín (the former name is used in Chile, the latter in Argentina), Viedma Lake and Argentino Lake.

Lake O’Higgins / San Martín consists of a series of finger-shaped flooded valleys. It has a surface area of 1,058 km² and a shoreline length of 525 km. Viedma Lake is a major elongated trough lake formed from melting glacial ice. It is approximately 50 miles (80 kilometers) long. Argentino Lake is the biggest freshwater lake in Argentina, with a surface area of 1466 km2, an average depth of 150 m, and a maximum depth of 500 m.

Maipo Stratovolcano and Diamante Lagoon, Chile and Argentina

34.1S 69.8W

February 2nd, 2012 Category: Lakes, Volcanoes

Chile - January 9th, 2011

Visible at the center of this orthorectified image is Maipo, a stratovolcano in the Andes, lying on the border between Argentina and Chile. It is located 90 km south of Tupungato and about 100 km southeast of Santiago.

Maipo retains a symmetrical, conical volcanic shape, unlike many of the other nearby peaks, making it the best known peak in the region, though it is not the highest. (Nearby Castillo is 5,485 m high.) Maipo is also almost the southernmost 5,000 metre peak in the Andes. (That honor goes to Sosneado, about 50 km to the south).

Maipo is located within the Diamante Caldera, a feature of about 15 km by 20 km size that is about one-half million years old. It rises about 1,900 m (6,230 ft) above the floor of the caldera. Immediately to the east of the peak, on the eastern side of the caldera floor, is Laguna del Diamante, a picturesque lake that formed when lava flows blocked drainage channels from the caldera in 1826. The lake covers a surface area of about 14.1 km² and is one of the largest freshwater resources in the Province.

Lakes in the Cordillera Oriental, Peru – February 19th, 2010

13.8S 71W

February 19th, 2010 Category: Image of the day, Lakes, Mountains, Rivers

Peru - February 12th, 2010

Peru - February 12th, 2010

The mountains in this orthorectified image are part of the Cordillera Oriental (“eastern mountain range”) of the Andes in Peru. Crossing the lower left quadrant diagonally from left to right is the valley of the Urubamba River, which rises in the Andes to the south-east of Cuzco near the Puno Region border.

Several lakes can be seen near the river, including Laguna Langui Layo (by the center of the bottom edge) and Laguna Sibinacocha (center of left edge). The former is located at an altitude of 3883 meters (12740 feet), and the latter at 4950 meters, making it one of the highest large lakes in the world.

Cayambe and Reventador Volcanoes, Ecuador

0.0N 78.1W

February 13th, 2010 Category: Mountains, Volcanoes

Ecuador - December 1st, 2009

Ecuador - December 1st, 2009

Cayambe (or Volcán Cayambe) is the name of a volcano located in the Cordillera Oriental, a branch of the Ecuadorian Andes. It is located in Pichincha province some 70 km (43 mi) northeast of Quito, in the upper left quadrant of this orthorectified image.

It is the third highest mountain in Ecuador. Cayambe, which has a permanent snow cap, is a Holocene compound volcano which has not erupted in historical times. At 4,690 m (15,387 ft) on its south slope is the highest point in the world crossed by the Equator and the only point on the Equator with snow cover. The volcano is located within the Cayambe-Coca Ecological Reserve.

Another volcano, Reventador, can be seen to the southeast of Cayambe, just about the center of the image. It is an active stratovolcano which lies in the eastern Andes of Ecuador. It lies in a remote area of the national park of the same name. The volcano’s main peak lies inside a U-shaped caldera which is open towards the Amazon basin to the east. Its lavas are andesitic.

Since 1541 it has erupted over 25 times, although its isolated location means that many of its eruptions have gone unreported. Its most recent eruption was in 2009, but the largest historical eruption occurred in 2002. During that eruption the plume from the volcano reached a height of 17 km and pyroclastic flows went up to 7 km from the cone.

Salar de Arizona on the Andean High Plateau, Argentina

24.7S 67.7W

November 12th, 2009 Category: Volcanoes

Argentina - September 29th, 2009

Argentina - September 29th, 2009

The Central Andean dry puna is an ecoregion located in the Andean High plateau, in South America. It is a part of the Puna grassland, occupying the southwestern portion of the Altiplano, and is located east of the Atacama Desert.

Salt Flats, locally known as Salares, are a characteristic feature of this ecoregion. Among the largest of these is the Salar de Arizaro, visible as a large, flat light grey area in this orthorectified image.

It is the largest salar of Puna, Argentina, with a surface area of 1500 km2, and the third largest salar in the Andes, after the Salar de Uyuni in Bolivia and the Salar de Atacama in Chile. The salar is used for metallic and non-metallic mining, as is it rich in salt, iron, marble, onyx and copper.

Also visible in the upper left corner, near the salar, is the Aracar Volcano. It is a large conical stratovolcano in northwestern Argentina, just east of the Chilean border. It has an uneroded summit crater about 1.5 km in diameter which contains a small crater lake.

It is located on the edge of the Puna de Atacama, a high desert plateau east of the Atacama Desert. The only observed volcanic activity was a possible steam or ash plume on March 28, 1993, seen from the village of Tolar Grande about 50 km southeast of the volcano.