Ancient River Canyon at the Straits of Mackinac
Автор: UpNorthK2
Загружено: 2009-03-08
Просмотров: 2162
Описание: Here's a cool NOAA animated fly-through of the submerged river canyon in the Straits of Mackinac (from west to east - from northern Lake Michigan into northern Lake Huron under the Mackinac Bridge). This canyon required the Mackinac Bridge to be a suspension bridge due to its breadth and depth. Notice the cable tower bridge foundation piers are visible in the animation. The canyon was cared by a great river during an early low water stage of the Great Lakes.
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