Lake Musters and Lake Colhué Huapí
body of water
Lake Musters and Lake Colhué Huapi (45°25′S 69°11′W, at altitudes of around 260 metres (850 ft)) form the terminal stage of the Senguerr River endorheic basin, located in the patagonic central region of Argentina in the south of Chubut province. Closest populated area is Sarmiento, an 8,000 inhabitant former Welsh immigrant colony. The lakes gave their names to the Mustersan and Colhuehuapian South American land mammal ages.
Description
Inflow
The basin lakes are fed mainly by the eastward running Senguerr river which begins its journey in the glacial lakes La Plata and Fontana in the Andes. The inflow ranges from 35 to 54 m3/sec and varies seasonally and yearly greatly.
Outflow
Both lakes have naturally a high evaporation process in the dry Patagonian environment by means of strong winds action and solar radiation. In shallow Colhué Huapi evaporation is much increased. In past decades, when excessive inflows did take place, water discharged to the birth branches of Chico River and eventually reached Chubut River. This occasional process last happened in 1939, since then Chico River is mostly a dry one.
Lake Musters
This lake, once called Otrón by the ancient tehuelches, received its current name in 1876 from naturalist and geographer Francisco Pascasio Moreno who aimed to honour the Patagonian adventurer George Chaworth Musters.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jul 26, 2026. The linked authority identifier is Q48987606. Authority coordinates are -45.417, -69.183. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1939 and 1876.
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This entry incorporates text from “Lake Musters and Lake Colhué Huapí” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.