The Great Lakes are a series of interconnected freshwater lakes located primarily
in the upper .... These pipes were formed by a violent, supersonic eruption of
deep-origin. .... The Great Lakes are...
The Laurentian Great Lakes were formed nearly 20000 years ago when the
earth's climate warmed and the last glacial continental ice sheet retreated.
How the lakes were formed. About a billion years ago, a fracture in the earth
running from what is now Oklahoma to Lake Superior generated volcanic activity
www.ask.com/youtube?q=How Were the Great Lakes Formed?&v=ibTWQogsbL8
May 9, 2010 ... The Dirty Secret at the Bottom of the Great Lakes: Oil & Water - Duration: 17:17. ...
THE GREAT LAKES WERE NOT MADE BY RECEDING ICE ...
Carving Great Lakes. To create something as spectacular as the great lakes
requires an even greater force -- but what is it?
The formation of the Great Lakes, which are also known as the Laurentian Great
Lakes, began around 2 billion years ago after the forming of North American ...
The Great Lakes have not always looked the way they do today. In fact if you
were to go back in time and visit Michigan 14,000 years ago, you would have
May 3, 2013 ... The Great Lakes — Superior, Huron, Michigan, Ontario and Erie ... These formed
the basic shape of the Great Lakes, and about 10,000 years ...
It is generally accepted that the Great Lakes did not exist in preglacial times but ...
(the tops of which were at higher elevations than was the ice margin) formed ...
www.iisgcp.org/catalog/downlds_09/Rocks & Rivers Shape GL.pdf
The sedimentary rocks in the Great Lakes Basin formed in an ocean that covered
most of the ... Refer to Map 1 of the activity "How were sedimentary rocks in.