Approximately 15,000 years ago, a wall of water more than 750 meters or 2,500 feet in height raced across a section of southern Russia. As this flood quickly overflowed the natural boundaries of river channels, it began depositing house sized boulders on cliffs, and creating giant ripples in the landscape. In the span of only a few hours, the river valleys were deepened by more than 100 feet and hundreds of feet thick of sediment were emplaced along its edge in giant bars. This flood originated due to one of the largest glacial dam bursts in geologic history, which permanently changed the landscape over a wide swath of Russia.

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Sources/Citations:
[1] P. Bohorquez, P.J. Jimenez-Ruiz, P.A. Carling, Revisiting the dynamics of catastrophic late Pleistocene glacial-lake drainage, Altai Mountains, central Asia, Earth-Science Reviews, Volume 197, 2019, 102892, ISSN 0012-8252, [ Ссылка ]. ([ Ссылка ])
[2] Keenan Lee, 2004, "The Altai Flood", geology.mines.edu, [ Ссылка ]
[3] Jürgen Herget, Anna R. Agatova, Paul A. Carling, Roman K. Nepop, Altai megafloods—The temporal context, Earth-Science Reviews, Volume 200, 2020, 102995, ISSN 0012-8252, [ Ссылка ]. ([ Ссылка ])
[4] Carling, Paul & Burr, Devon & JOHNSEN, TIMOTHY & Brennand, Tracy. (2009). A review of open-channel megaflood depositional landforms on Earth and Mars. 10.1017/CBO9780511635632.003.

0:00 The Altai Megaflood
1:25 A Massive Lake
2:00 Reaches the Caspian Sea
3:11 Triggering the Floods

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