The Great Lakes began to form at the end of the last glacial …show more content…
This designation, however, is not universal. Those living on the shore of Lake Superior often refer to all the other lakes as "the lower lakes", because they are farther south. Sailors of bulk freighters transferring cargoes from Lake Superior and northern Lake Michigan and Lake Huron to ports on Lake Erie or Ontario commonly refer to the latter as the lower lakes and Lakes Michigan, Huron, and Superior as the upper lakes. This corresponds to thinking of Lakes Erie and Ontario as "down south" and the others as "up north". Vessels sailing north on Lake Michigan are considered "upbound" even though they are sailing toward its effluent current.
Primary connecting waterways
The Chicago River and Calumet River systems connect the Great Lakes Basin to the Mississippi River System through man-made alterations and canals.
The St. Marys River, including the Soo Locks, connects Lake Superior to Lake Huron.
The Straits of Mackinac connect Lake Michigan to Lake Huron .
The St. Clair River connects Lake Huron to Lake St. Clair.
The Detroit River connects Lake St. Clair to Lake Erie.
The Niagara River, including Niagara Falls, connects Lake Erie to Lake Ontario.
The Welland Canal, bypassing the …show more content…
The lake lies in the Nipigon Embayment, a failed arm of the triple junction in the Midcontinent Rift System event, estimated at 1,109 million years ago.
Green Bay is an arm of Lake Michigan, located along the south coast of the Upper Peninsula of Michigan and the east coast of Wisconsin. It is separated from the rest of the lake by the Door Peninsula in Wisconsin, the Garden Peninsula in Michigan, and the chain of islands between them, all of which were formed by the Niagara Escarpment.
Lake Winnebago, connected to Green Bay by the Fox River, serves as part of the Fox–Wisconsin Waterway and is part of a larger system of lakes in Wisconsin known as the Winnebago Pool.
Georgian Bay is an arm of Lake Huron, extending northeast from the lake entirely within Ontario. The bay, along with its narrow westerly extensions of the North Channel and Mississagi Strait, is separated from the rest of the lake by the Bruce Peninsula, Manitoulin Island, and Cockburn Island, all of which were also formed by the Niagara