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The Laurentide ice sheet (LIS) was a massive sheet of ice that covered millions of square miles, including most of Canada and a large portion of the Northern United States, multiple times during the Quaternary glaciation epochs, from 2.58 million years ago to the present.
The Laurentide Ice Sheet continued to recede. Continued warming shrank the ice front towards present day Hudson Bay. Here, the Lake Agassiz northward outlet drained into the Tyrrell Sea. This breach dropped the water level below the eastern Kinojevis outlet. The drainage was followed by the disintegration of the adjacent ice front at about ...
Table III Laurentide Ice Sheet; 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
Laurentide Ice Sheet: Primary outflows: Grand River valley in Michigan: Basin countries: Canada United States: First flooded: 9,500 years before present: Max. length: 220 mi (350 km) Max. width: 30 mi (48 km) Residence time: 7300 years in existence: Surface elevation: 230 ft (70 m) [1] References
Around 900,000 years before present (YBP) the Laurentide Ice Sheet reached southward into western Pennsylvania, blocking the preexisting drainage that flowed northward. [2] The ice dammed these rivers, creating large lakes, forcing the water to find a new drainage pattern, which exists to the present.
Lake Maumee was a proglacial lake and an ancestor of present-day Lake Erie.It formed about 17,500 calendar years, or 14,000 Radiocarbon Years Before Present (RCYBP) as the Huron-Erie Lobe of the Laurentide Ice Sheet retreated at the end of the Wisconsin glaciation.
The moraine was created when the Green Bay Lobe of the Laurentide Ice Sheet, on the west, collided with the Lake Michigan Lobe of that glacier, on the east, depositing sediment. The western lobe formed Green Bay, Lake Winnebago and the Horicon Marsh. The major part of the Kettle Moraine area is considered interlobate moraine, though other types ...
The last phases of the Wisconsin Glaciation involved several major lobes of the Laurentide Ice Sheet: the Des Moines lobe, which flowed down toward Des Moines on the west; the Superior lobe and its sublobes on the north; and the Green Bay lobe and Lake Michigan lobes on the east. [10]