Huge Ancient Lake Discovered in Russia

Live Science ^ | Sep 9, 2008 | Andrea Thompson

[decimon]

A huge ancient lake once dammed up by the vast ice sheets of the last Ice Age has been found by geologists in Russia.

Large glacial lakes were known to cover parts of Russia and North America during the Ice Age. One of the most well-known is Lake Agassiz, which covered portions of Canada and northern Minnesota more than 10,000 years ago. At the time it was the largest freshwater lake on the planet, with an area larger than all of the present-day Great Lakes combined, larger even than California.

Last year, geologists found the remnants of a lake near a Russian village called UstNem. Now, the same lake has been found to extend 435 to 497 miles (700 to 800 kilometers) to the west, near another village called Kotlas. By comparison, Lake Superior, the largest of the Great Lakes, is 350 miles (560 km) long at its greatest length. The ancient lake- no longer a lake - is just a few tens of kilometers away from the Ural Mountains.

[decimon]

Glacial lakes supporting life, including human?

[decimon]

Ice water ping.

[Edit35]

What are the indicators that a large lake once existed in that spot?

Fish bones?

Sunken canoe’s?

Layers of mud?

I always wondered how scientists are able to make these determinations with accuracy.

[Rudder]

Glacial lakes supporting life, including human?

They must, 'cause I got one 7 feet below me and been drinking its water for many years.

[SunkenCiv]

Thanks decimon. I grabbed the article, or one like it, saved it to disk, but never got around to posting it.

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[SunkenCiv]

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[Fraxinus]

Scientists use several and go with the best evidence.

Fish bones?
Shellfish are more likely, there are species that only live in fresh water.

Layers of mud?
yes, along with wave cut terraces, stranded beaches, and other geological evidence of large amounts of still water.

[bert]

I saw remnants of such an impoundment from Polychrome in Denali National Park in Alaska. There is clear evidence of areas swept by rushing water, very large and worn boulders in odd places, large scour holes made by these big rocks being roiled around in the same place.

The scale is extremely large,ie miles, but the same phenomena are visible in small streams.

[Sawdring]

They run a couple of shows on the Science channel that claim the Scablands in Washington were created when a glacial damn repeatedly burst and formed over hundreds of years. The forming of the Scablands might be a good one to look up and watch in God's Video Store when one gets there.

[bert]

....... The forming of the Scablands might be a good one to look up........

I think that would be Lake Bonneville. I have seen that piece twice, the second time for details missed the first time around. It was that piece that allowed me to actually see the Alaska scour from the broken ice dam and understand the features laid out for miles and miles in front and below me.