Lake Michigan is one of the five Great Lakes of North America and the only one located entirely within the United States. The other four Great Lakes are shared by the U.S. and Canada. It is the second-largest of the Great Lakes by volume and the third-largest by surface area, after Lake Superior and Lake Huron (and is slightly smaller than the U.S. state of West Virginia). To the east, its basin is conjoined with that of Lake Huron through the wide Straits of Mackinac, giving it the same surface elevation as its easterly counterpart; the two are technically a single lake. Lake Michigan is shared, from west to east, by the U.S. states of Wisconsin, Illinois, Indiana, and Michigan. The word "Michigan" originally referred to the lake itself, and is believed to come from the Ojibwa word mishigami meaning "great water". Lake Michigan is also the only one of the five Great Lakes not to share a shoreline with the Canadian province of Ontario, the only province in Canada that borders the Great Lakes.
Some of the earliest human inhabitants of the Lake Michigan region were the Hopewell Indians. Their culture declined after 800 AD, and for the next few hundred years, the region was the home of peoples known as the Late Woodland Indians. In the early 17th century, when western European explorers made their first forays into the region, they encountered descendants of the Late Woodland Indians: the Chippewa; Menominee; Sauk; Fox; Winnebago; Miami; Ottawa; and Potawatomi. The French explorer Jean Nicolet is believed to have been the first non-Native American to reach Lake Michigan, possibly in 1634 or 1638.
Lake Michigan is joined via the narrow, open-water Straits of Mackinac with Lake Huron, and the combined body of water is sometimes called Michigan–Huron (also Huron–Michigan). The Straits of Mackinac were an important Native American and fur trade route. Located on the southern side of the Straits is the town of Mackinaw City, Michigan, the site of Fort Michilimackinac, a reconstructed French fort founded in 1715, and on the northern side is St. Ignace, Michigan, site of a French Catholic mission to the Indians, founded in 1671. In 1673, Jacques Marquette, Louis Joliet and their crew of five Métis voyageurs followed Lake Michigan to Green Bay and up the Fox River, nearly to its headwaters, in their search for the Mississippi River. The eastern end of the Straits was controlled by Fort Mackinac on Mackinac Island, a British colonial and early American military base and fur trade center, founded in 1781.
With the advent of European exploration into the area in the late 17th century, Lake Michigan became part of a line of waterways leading from the Saint Lawrence River to the Mississippi River and thence to the Gulf of Mexico.[8] French coureurs des bois and voyageurs established small ports and trading communities, such as Green Bay, on the lake during the late 17th and early 18th centuries.
In the 19th century, Lake Michigan played a major role in the development of Chicago and the Midwestern United States west of the lake. For example, 90% of the grain shipped to Chicago traveled east over Lake Michigan during the antebellum years, and only rarely falling below 50% after the Civil War and the major expansion of railroad shipping. The first person to reach the deep bottom of Lake Michigan was J. Val Klump, a scientist at the University of Wisconsin–Milwaukee. Klump reached the bottom via submersible as part of a 1985 research expedition. In 2007, a row of stones paralleling an ancient shoreline was discovered by Mark Holley, professor of underwater archeology at Northwestern Michigan College. This formation lies 40 feet (12 m) below the surface of the lake. One of the stones is said to have a carving resembling a mastodon. So far the formation has not been authenticated.
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