General Carrera Lake (Chilean part, officially renamed in 1959) or Lake Buenos Aires (Argentine part) is a

lake A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much large ...

located in

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 g ...

and shared by

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, th ...

and

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 east a ...

. Both names are internationally accepted, while the

autochthonous Autochthon, autochthons or autochthonous may refer to: Fiction * Autochthon (Atlantis), a character in Plato's myth of Atlantis * Autochthons, characters in the novel ''The Divine Invasion'' by Philip K. Dick * Autochthon, a Primordial in the ...

name of the lake is Chelenko, which means "stormy waters" in Aonikenk. Another historical name is Coluguape from

Mapuche The Mapuche ( (Mapuche & Spanish: )) are a group of indigenous inhabitants of south-central Chile and southwestern Argentina, including parts of Patagonia. The collective term refers to a wide-ranging ethnicity composed of various groups who s ...

, a derivative of this name is applied to Colhué Huapí Lake after Argentine explorer

Francisco Moreno Francisco Pascasio Moreno (May 31, 1852 – November 22, 1919) was a prominent explorer and academic in Argentina, where he is usually referred to as ''Perito'' Moreno (''perito'' means "specialist, expert"). Perito Moreno has been credited as on ...

reached this lake in 1876 conflating it with Coluguape (General Carrera Lake). The lake is of

glacial A glacial period (alternatively glacial or glaciation) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate betwe ...

origin and is surrounded by the

Andes 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. The range is long, wide (widest between 18°S – 20°S ...

mountain range. The lake drains to 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 contin ...

on the west through the Baker River. During the last glaciation the lake drained to the Atlantic through

Deseado River Deseado River () is a river in the Argentine province of Santa Cruz. The name Deseado comes from the English ''Desire'', the name of one of the two ships commanded by John Davis during the Thomas Cavendish expedition of 1592. The source of t ...

. The weather in this area of Chile and Argentina is generally cold and humid. But the lake itself has a sunny

microclimate A microclimate (or micro-climate) is a local set of atmospheric conditions that differ from those in the surrounding areas, often with a slight difference but sometimes with a substantial one. The term may refer to areas as small as a few squ ...

, a weather pattern enjoyed by the few settlements along the lake, such as Puerto Guadal, Fachinal, Mallín Grande, Puerto Murta, Puerto Río Tranquilo, Puerto Sánchez, Puerto Ingeniero Ibáñez and Chile Chico in Chile, and

Los Antiguos Los Antiguos is a town in Santa Cruz Province, Argentina, located on the south shore of Lago Buenos Aires. It lies 2 km from the border with Chile, and 8 km from the Chilean town of Chile Chico. It is connected to Perito Moreno and ...

and Perito Moreno in Argentina. The area near the coast of the lake was first inhabited by

criollos In Hispanic America, criollo () is a term used originally to describe people of Spanish descent born in the colonies. In different Latin American countries the word has come to have different meanings, sometimes referring to the local-born majo ...

and

European European, or Europeans, or Europeneans, may refer to: In general * ''European'', an adjective referring to something of, from, or related to Europe ** Ethnic groups in Europe ** Demographics of Europe ** European cuisine, the cuisines of Europe ...

immigrants between 1900 and 1925. In 1971 and 1991, eruptions of the Hudson Volcano severely affected the local economy, especially that of

sheep Sheep or domestic sheep (''Ovis aries'') are domesticated, ruminant mammals typically kept as livestock. Although the term ''sheep'' can apply to other species in the genus '' Ovis'', in everyday usage it almost always refers to domesticated ...

farming. A car ferry operates between Puerto Ingeniero Ibáñez and Chile Chico in the Chilean sector of the lake. The lake is known as a

trout Trout are species of freshwater fish belonging to the genera '' Oncorhynchus'', '' Salmo'' and '' Salvelinus'', all of the subfamily Salmoninae of the family Salmonidae. The word ''trout'' is also used as part of the name of some non-salm ...

and

salmon Salmon () is the common name for several commercially important species of euryhaline ray-finned fish from the family Salmonidae, which are native to tributaries of the North Atlantic (genus ''Salmo'') and North Pacific (genus '' Oncorhy ...

fishing destination.

Area

The lake has a surface of of which are in the Chilean Aysén del General Carlos Ibáñez del Campo Region, and in the Argentine Santa Cruz Province, making it the biggest lake in Chile, and the fourth largest in Argentina. In its western basin, Lake Gen. Carrera has maximum depth.

Geology

The lake occupies a continental-scale graben formed by SWS-ENE normal faults that have resulted in down-dropping the bottom of the lake to below mean sea level. Preservation of younger lithostratigraphic units within the graben form reverse stratigraphy with older units exposed at higher topographic elevations to the south. The graben channeled mountain glaciers which formed terminal moraine helping to modify the present-day shape of the lake. The tectonic activity that formed the depression can be inferred to subduction of the triple joint that has occurred over the past 20 million years, as indicated by ripple marks in volcaniclastic sediments observed along the southern shoreline. There is some speculation on whether the tectonics and crustal heat flow in the lake area are influenced by the asthenospheric window that exists beneath the crust in this region of Patagonia. The Marble Caves, Marble Chapel, and Marble Cathedral are unusual geological formations located on the shoreline midway along the lake's length. They represent a group of caverns, columns, and tunnels formed in monoliths of marble. The Marble Caves have been formed by wave action over the last 6,200 years.

Gallery

File:SRTM-W75.80E71.50S47.00N46.00.Chilechico.png, SRTM-Topography of the Chilean zone File:ChileChico-001.jpg, Boat near Chile Chico in

File:Sur1.gif, Map of the Chilean zone file:Catedraldemarmol.JPG, Folded and weathered

marble Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. Marble is typically not foliated (layered), although there are exceptions. In geology, the term ''marble'' refers to metamorphose ...

at General Carrera Lake

References

{{Authority control Lakes of Santa Cruz Province, Argentina Lakes of Chile Lakes of Aysén Region Argentina–Chile border International lakes of South America Cenozoic rifts and grabens