The Paleolake Tehuelche is the name for several former lakes that existed in the area of Torres del Paine in southern Patagonia. [1] These were proglacial lakes that existed next to the Patagonian Ice Sheet during the Late Pleistocene and Early Holocene. [1] [2] Some of the evidence of the lakes stem from lake terraces observable at present but these is some uncertainty on which terraces are associated to which lake or lake stage. [1]
About 38,000 years BP an early Paleolake Tehuelche existed and drained eastward through Turbio River. The surface of this lake was 250 to 280 m a.s.l. [1]
A particular lake named Great Tehuelche Paleolake covered what is now Sarmiento and Del Toro lakes plus a large area to east making Cazador Range a peninsula [2] until about 7,113 years BP when the lake drained and ceased to exist. [2]