Lake Superior: North American Mid-Continent Rift

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Lake Superior first took form about 1.2 billion years ago as an effect of the North American Mid-Continent Rift. The area was occupied by Native Americans for several years prior to being explored in the mid-1600s by the French. The lake was a key form of transportation for the fur trade and other trading actions during the Colonial period and remains a huge shipping focal point to this day.
Lake Superior is not only the largest of the Great Lakes, but it is also the largest body of fresh water on Earth as well. Located on the northern border of Wisconsin, Lake Superior broadens from the upper peninsula of Michigan north to Ontario, Canada, and reaches west to the eastern perimeter of Minnesota.
The name Superior refers to its mass and also