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Glacial Lake Duluth is the body of water that formed at the southwestern margin of the Superior lobe and occupied a much larger area than the present Lake Superior. Its shorelines stood nearly 148 meters above the level of its modern successor, Lake Superior. During its early history Lake Duluth drained into the Mississippi River down the St ...
The first people came to the Lake Superior region 10,000 years ago after the retreat of the glaciers in the Last Glacial Period. They are known as the Plano , and they used stone-tipped spears to hunt caribou on the northwestern side of Lake Minong.
Similarly, Glacial Lake Duluth, in the basin of Lake Superior, was dammed by a glacier; it drained down the ancient course of the Midcontinental Rift to the St. Croix River and the Mississippi. When the glaciers receded, the lake was able to drain through the Great Lakes to the Saint Lawrence River. [12] Giant animals roamed the area.
Lake Duluth; 11,500 – 11,000 YBP [13] in the western half of the Superior basin. [1] Glacial Lake St. Louis occupied St. Louis Bay at the southern tip of modern Lake Superior. Lake Keweenaw; 12,500 – 12,000 YBP [1] in the western Superior basin. [1] Atlantic Ocean. Lake Albany in the valley of the Hudson River. [14]
Lake Superior agates originally formed along the Midcontinent Rift in Michigan's Keweenaw Peninsula, Minnesota's North Shore, Ontario's Thunder Bay region, Lake Superior's Isle Royale and Michipicoten Island, and in the area that has since become the bottom of Lake Superior. [1] Subsequent glacial activity spread agates throughout northeastern ...
The Lake Superior shipwreck coast from Grand Marais, Michigan, to Whitefish Point became known as the "Graveyard of the Great Lakes". More vessels have been lost in the Whitefish Point area than any other part of Lake Superior. [117] The Whitefish Point Underwater Preserve serves as an underwater museum to protect the many shipwrecks in this area.
Lake Minong was a proglacial lake that formed in the Lake Superior basin during the Wisconsin glaciation around 10,000 B.P. This was the last glacial advance that entered Michigan and covered only part of the upper peninsula.
Glacial lobes and sublobes of the southern Laurentide Ice Sheet during the late Wisconsin Glaciation. [6] Major Lobes Minor Lobes Des Moines Grantsburg St. Louis Rainey Lake Superior [7] Wadena Chippewa [7] Wisconsin Valley [7] Langlade [7] Green Bay [7] Lake Michigan [7] Delavan Harvard-Princeton Peoria Decatur