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The foundation for the Great Lakes basin was set by years of volcanic activity followed by flooding. In the Ice Age, glaciers carved massive valleys. As the glaciers receded, the Great Lakes began to form from the melting receding glacial water.

Great Lakes - Wikipedia

en.wikipedia.org/wiki/Great_Lakes

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...

How the Great Lakes Were Formed - The Awesome Mitten

www.awesomemitten.com/how-the-great-lakes-were-formed/

Feb 18, 2013 ... Ever wondered about the great bodies of water that surrounds the great lake state? Here's a crash course on the formation of out great lakes!

www.ask.com/youtube?q=How Were the Great Lakes Formed?&v=ibTWQogsbL8
May 9, 2010 ... THE GREAT LAKES WERE NOT MADE BY RECEDING ICE ... The Dirty Secret at the Bottom of the Great Lakes: Oil & Water - Duration: 17:17.

How were the Great Lakes formed? | Reference.com

www.reference.com/history/were-great-lakes-formed-bad2150583c4e632

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 ...

TEACH Geography: How the Lakes Were Formed - Great Lakes ...

www.great-lakes.net/teach/geog/lakeform/lf_1.html

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  ...

Formation of the Great Lakes - Emporia State University

academic.emporia.edu/aberjame/student/damery1/gl_form.html

Dec 1, 2004 ... All rivers and streams in these areas drain into the Great Lakes. ... These lobes were mostly caused by outcrops of highly resistant bedrock of ...

How They Were Made - University of Wisconsin Sea Grant Institute

seagrant.wisc.edu/glaciers/

Back to Great Lakes. How They Were Made. Thousands of years ago, the melting mile-thick glaciers of the Wisconsin Ice Age left the North American continent a ...

Great Lakes Formation - Tech Alive

techalive.mtu.edu/meec/module08/GreatLakesPastandPresent.htm

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 found ...

Great Facts About the Five Great Lakes - Live Science

www.livescience.com/29312-great-lakes.html

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 ...