About The Niagara Escarpment

Glacial Geology

About 30,000 years ago, during the last ice age, the Escarpment in Wisconsin caused the vast glaciers moving south from Canada to split into two lobes, creating Green Bay, Lake Winnebago, and Lake Michigan. As the ice melted, water surged into rock fractures and created caves.

www.uwsp.edu/geo/projects/geoweb/participants/Dutch/geolwisc/GeolMaps/WICEAGES.GIF