Summary The Great Lakes region provided geologists with much of the evidence for the frequent ice ages that visited North America. But the lakes may be a rather transient feature of the continent dependent upon the recurring ice ages to maintain their existence.
Directed : Unknown
Written : Unknown
Stars : Corey Johnson Jonathan Keeble Tony Prave Mike Poland
Genres : History Documentary
Release date : Mar 23, 2009
Countries of origin : United States United Kingdom
Official sites : Official site
Language : English
Filming locations : Grand Canyon National Park, Arizona, USA
Production companies : History Channel Pioneer Productions
Summary The Great Lakes region provided geologists with much of the evidence for the frequent ice ages that visited North America. But the lakes may be a rather transient feature of the continent dependent upon the recurring ice ages to maintain their existence.
Genres : History Documentary
Release date : Mar 23, 2009
Countries of origin : United States United Kingdom
Official sites : Official site
Language : English
Filming locations : Grand Canyon National Park, Arizona, USA
Production companies : History Channel Pioneer Productions
