Ancient lake
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An ancient lake is a lake that has consistently carried water for more than one million years. Twelve of the 20 ancient lakes have existed for more than 2.6 million years, the full Quaternary period.
Lake Zaysan in Kazakhstan is one of the oldest lakes in the world.
Lake Baikal
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Lake Baikal is a rift lake and the deepest lake in the world. It is situated in southern Siberia, Russia, between the federal subjects of Irkutsk Oblast to the northwest and the Republic of Buryatia t
Ancient lake
…traits and speciation. Most of the world's bodies of water are less than 18,000 years old. There are only 20 ancient lakes over 1 million years old. Lake Baikal is often considered the oldest, as clear evidence shows that it is 25–30 million years old. Lake Zaysan may be even older, of Cretaceous origin and at…
Lake Baikal's water is especially clear
Spring ice melt underway on Lake Baikal, on 4 May, 2012
Ice cover survey on the lake
Circle of thin ice, diameter of 4.4 km (2.7 mi) at the lake's southern tip, probably caused by convection