State Forest History After the period of

Some 20,000 years ago, two lobes of a great ice sheet met along a line extending northeast from Richmond in Walworth County through the Oconomowoc Lake country to Kewaunee County. One lobe moved down what is now the Green Bay-Lake Winnebago area. Spreading under tremendous pressure, the two lobes met and in the encounter, large blocks of ice were broken off and buried in the glacial deposit or