Catastrophic Flooding From Ancient Lake May Have Triggered Cold Period

Newswise ^ | 12-18-2004 | Jeff Donnelly

[concentric circles]

Woods Hole Oceanographic Institution

Paleogeography 13,400 years ago. Glacial Lake Iroquois is held back by an ice dam in northern New York. When that dam collapsed it drained (red arrows) into the lakes within the Champlain and Hudson Valleys, breaching the Narrows Dam (near New York City). It cascaded across the then exposed continental shelf to the North Atlantic Ocean. This release of meltwater reduced the flow of the Gulf Stream and caused an abrupt climate cooling in the Northern Hemisphere that lasted several hundred years. (Illustration by Jack Cook ©WHOI)

Paleogeography 13,300 years ago. Glacial Lake Candona forms in northern New York and southern Canada as the ice sheet retreats north.

Paleogeography 13,100 years ago. Glacial Lake Candona has expanded into the St Lawrence Lowlands as the ice sheet continues to retreat.

Paleogeography 13,000 years ago. Glacial Lake Candona drains into the North Atlantic through the St. Lawrence Valley as the ice sheet retreats from the region. The drainage of Glacial Lake Candona and the opening of the drainage out the St. Lawrence initiated another shut down of the Gulf Stream, causing the Younger Dryas cold interval.

[BigBobber]

Thanks for the link.

As a former resident of the Hudson River Valley, I found this to be fascinating.

[Unam Sanctam]

Fascinating. Thanks for the article and the map.

[blam]

The Legacy of Lake Aggasiz

Imagine it's 11,000 years ago, and imagine that you are high above midwestern North America. All you see below you is a lake — a giant lake, born of a massive, continental glacier.

Bigger than Lake Superior, larger than any freshwater body on the earth today, ancient Lake Aggasiz extended from northern Saskatchewan in the west to northeastern Ontario in the east, and from southern Minnesota in the south to northern Manitoba in the north.

Rising and Falling: Glacial Lake Aggasiz (named for Louis Aggasiz, 19th century Swiss naturalist and glaciation theorist) began to form about 12,000 years ago, as the Laurentide Ice Sheet retreated northward. Over the next 5,000 years, it changed its boundaries several times, as glacial ice advanced and retreated. At the peak of its coverage, the lake drained to the south through the Minnesota River Valley, west through northern Saskatchewan to Alaska, and east to the Great Lakes. About 8,500 years ago, the southern part of the lake drained for the last time, and about 1,000 years later, it was gone from northern Canada.

Today, the Red River Valley exists in what was the southwestern portion of Lake Aggasiz, extending just over 500 kilometres from Lake Traverse in the south to Lake Winnipeg in the north.

[blam]

The Tibetans have flood myths of the 'mountain topping' variety.

I have seen this explained by placing the original Tibetans as a coastal people during the Ice Age and these myths are about the giant tsunamis they witnessed before they migrated/fled inland. The end of the Ice Age was a very unsettled time.

[Cold Heart]

BTTT

[F.J. Mitchell]

Science fiction is a very entertaining medium-but to avoid confusion among us laymen, it should be labeled as what it is.

[SunkenCiv]

missed you on the GGG ping.

[SunkenCiv]

Just updating the GGG information, not sending a general distribution.

Please ping me to other topics which are appropriate for the GGG list. Thanks.

Please FREEPMAIL me if you want on, off, or alter the "Gods, Graves, Glyphs" PING list --
Archaeology/Anthropology/Ancient Cultures/Artifacts/Antiquities, etc.
The GGG Digest -- Gods, Graves, Glyphs (alpha order)

[SunkenCiv]

Pure scientific research triumphs again. A BTTT for a non-fiction topic on FR.

[SunkenCiv]

from 2005.

Catastrophism ping list

· join · view topics · view or post blog · bookmark · post new topic ·

[SunkenCiv]

A dash of cold water for global warming forecast
The Scotsman | April 21, 2003 | GEORGE KEREVAN
Posted on 04/20/2003 8:10:33 PM EDT by MadIvan
http://www.freerepublic.com/focus/f-news/896991/posts

[r9etb]

Donnelly and colleagues analyzed data from sediment cores, walrus fossils and pollen

I always say: you can never go wrong using walrus fossils.

[SunkenCiv]

Just an update/adding to the catalog -- no ping.

join or quit view topics view or post blog bookmark post new topic subscribe

[SunkenCiv]