(photo) Archeologist peers through a surveying instrument. snapshot: the midwest Download the print version
Topography and climate    The plains to the west, the Appalachians to the east, bisected by a Mississippi swollen with glacial meltwater. To the north lay the Great Lakes, bordered by retreating glaciers that had left their mark on the hills and plains in what is now Ohio, Illinois, and Indiana. Ice gripped upper Minnesota, Michigan, and Wisconsin.