Kristina SmithWednesday, January 8, 2025
The massive grooves cut into rock on Kelleys Island at least 17,000 years ago by giant glaciers that carved out the Great Lakes region are believed to be the largest preserved glacial grooves in the world.
Although the site is probably the best-known and largest example of glacial grooves in the Lake Erie region, there are other sites around the Lake Erie islands and some on the mainland that have glacial grooves and striations, or scratches in the rock, left from the Ice Age.