| Share

Agassiz, Lake

Agassiz, Lake (ăgˈəsē) [key], glacial lake of the Pleistocene epoch, c.700 mi (1,130 km) long, 250 mi (400 km) wide, formed by the melting of the continental ice sheet beginning some 14,000 years ago; it eventually covered much of present-day NW Minnesota, NE North Dakota, S Manitoba, central E Saskatchewan, and SW Ontario. The lake was named in 1879 in memory of Louis Agassiz for his contributions to the theory of the glacial epoch. Lake Traverse, Big Stone Lake, and the Minnesota River are in the channel of prehistoric River Warren, Lake Agassiz's original outlet to the south. As the ice melted, the water drained E into Lake Superior, and after the ice disappeared, N into Hudson Bay. The lake's disappearance (c.8,400 years ago) left lakes Winnipeg, Manitoba, and Winnipegosis, Red Lake, Lake of the Woods, and other smaller lakes. The bed of the old lake, the Red River valley, has become an important crop-growing region due to its rich soil.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

More on Lake Agassiz from Infoplease:

  • Big Stone Lake - Big Stone Lake Big Stone Lake, narrow lake, c.25 mi (40 km) long, on the Minn.–S.Dak. line. ...
  • Lake Winnipegosis - Winnipegosis, Lake Winnipegosis, Lake , 2,086 sq mi (5,403 sq km), 125 mi (201 km) long and 25 mi ...
  • Lake Manitoba - Manitoba, Lake Manitoba, Lake, 1,817 sq mi (4,706 sq km), SW Man., Canada; one of the largest lakes ...
  • Minnesota, river, United States - Minnesota Minnesota, river, 332 mi (534 km) long, rising in Big Stone Lake at the W boundary of ...
  • Lake of the Woods - Lake of the Woods Lake of the Woods, 1,485 sq mi (3,846 sq km), c.70 mi (110 km) long, on the ...

See more Encyclopedia articles on: U.S. Physical Geography

24 X 7

Private Tutor

Click Here for Details
24 x 7 Tutor Availability
Unlimited Online Tutoring
1-on-1 Tutoring