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The Last Glacial Period caused a much lower global sea level
The Last Glacial Period caused a much lower global sea level
A diagram of the formation of the Great Lakes
A diagram of the formation of the Great Lakes
Sandstone cliff at Starved Rock State Park, carved by the force of the Kankakee Torrent some 19,000 years ago
Sandstone cliff at Starved Rock State Park, carved by the force of the Kankakee Torrent some 19,000 years ago
Michigan ice lobe at the Valparaiso Moraine location during the Pleistocene Ice Age. (Leverett, 1899, U.S. Geological Survey)
Michigan ice lobe at the Valparaiso Moraine location during the Pleistocene Ice Age. (Leverett, 1899, U.S. Geological Survey)
Designed from 1942 - Illinois Glacial Lakes by George, E. Eckblaw
Designed from 1942 - Illinois Glacial Lakes by George, E. Eckblaw