West Siberian Glacial Lake
From Wikipedia, the free encyclopedia
The West Siberian Glacial Lake, also known as West Siberian Lake, or Mansiyskoe Lake (Russian: Мансийское озеро), was a periglacial lake formed when the Arctic Ocean outlets for each of the Ob and Yenisei rivers were blocked by the Barents-Kara Ice Sheet during the Weichselian Glaciation, approximately 80,000 years ago. At its maximum extent, the lake's surface area was more than twice that of the present-day Caspian Sea.
It is theorized that while drainage to the Arctic Ocean basin (e.g. by the Ob and Yenisei Rivers) was prevented, the lake would eventually overflow to the Mediterranean Sea through a circuitous route that would include the Aral Sea, the Caspian Sea, the Sea of Azov, and the Black Sea. Interestingly, this would have resulted in water from the Selenga River and Lake Baikal draining over a course of some 6,000 miles, considerably longer than any river's course today.[1]
See Mangerud et al (2004)[2] for excellent, precise diagrams and descriptions of the lake as well as postulated drainage patterns.
[edit] Notes
- ^ Dutch, Steve, Professor of Natural and Applied Sciences, University of Wisconsin-Green Bay. "Pleistocene Glaciers and Geography" webpage (accessed 11/30/2006)
- ^ Mangerud, J. et al (2004). Ice-dammed lakes and rerouting of the drainage of northern Eurasia during the Last Glaciation. Quaternary Science Reviews 23 (2004), pp. 1313–1332. [1] (accessed 11/30/2006)
