The 5 Great Lakes: -
Superior, Michigan, Huron, Erie, and Ontario hold 21% of the world's surface fresh water and form the largest group of freshwater lakes on Earth.
Their combined total surface area is 208,610 km2 (80,545 sq mi), and their combined total volume is 22,560 km3 (5,412 cu mi).
Their origins are glacial.
Great lakes
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The Great Lakes cover approximately 94,250 square miles in total.
Lake Superior
Central Lowlands
Lake Michigan
lake
the American territory along the Great Lakes
Geologists believe the Great Lakes were carved from glaciers that crossed over the area thousands of years ago.
Long ago the great lakes were even bigger. As they receded, they left behind the material deposited on the bottom of the lakes - which was extremely rich in nutrients.The area around the great lakes was flattened considerably by glaciers - which makes it easier to farm.The area around the great lakes tends to get sufficient rainfall to support crops without much irrigation.The area around the great lakes is crisscrossed by plenty of streams and rivers - which can provide additional water to irrigate crops when rainfall is not sufficient.
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About 21% of the Great Lakes' total area lies within Canada's borders. This includes portions of Lakes Superior, Huron, Erie, and Ontario.