› added 2 years ago
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TIL that there are only 20 ancient lakes (defined as carrying water for more than a million years) in the world, with only 3 in North America (Tahoe, Tule, Pingualuk). Nearly all are tectonic (i.e. rift zones) in origin, however 2 are from meteorite craters (Pingualuk in Canada, Bosumtwi in Ghana)