These potholes are the result of glacier activity in the Wisconsin glaciation, which ended about 10,000 years ago. The decaying ice sheet left behind depressions formed by the uneven deposition of till in ground moraines. These depressions are called potholes, glacial potholes, kettles, or kettle lakes.
The potholes found in this area were created by the retreating Wisconsin glaciation, which ended about 10,000 years ago. The melting ice sheet left behind depressions called potholes, glacial potholes, kettles, or kettle lakes due to uneven till deposition in ground moraines.