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In 2007, Mark Holley, professor of underwater archeology at Northwestern Michigan College, discovered a series of stones arranged in a circle 40 feet below the surface of Lake Michigan. One stone outside the circle seems to have carvings that resemble a mastodon—an elephant-like animal that went extinct about 10,000 years ago.
Archaeologists had been hired to survey the Lake's floor near Traverse City, Michigan, and examine old boat wrecks with a sonar device. They discovered sunken boats and cars and even a Civil War-era pier. But among these expected finds was a potentially-prehistoric surprise.
Originally posted by Animal
[I believe the Great Lakes to be the remnants of glaces....
The Great Lakes
Thousands of years ago, the melting mile-thick glaciers of the Wisconsin Ice Age left the North American continent a magnificent gift: five fantastic freshwater seas collectively known today as the Great Lakes -- Lake Superior, Lake Huron, Lake Michigan, Lake Erie and Lake Ontario.
People have lived in the Great Lakes region for over 10,00 years. Archaeological evidence suggests that three distinct and successive cultures lived in the Great Lakes region before the 17th century: the Paleo-Indians, the Old Copper Indians and the Woodland Indians. All of these peoples utilized their resources in the Great Lakes by hunting, fishing and eventually farming. The Woodland Indians descendants would form the Chippewa (Ojibwe), Fox, Huron, Iroquois, Ottawa, Potawatomi, Menominee and other Great Lakes tribes of today.