Michigan Rocks!: A Guide to Geologic Sites in the Great Lakes State

Michigan is the only state in the nation to border four of the five Great Lakes—giving it the nickname, the Great Lakes State. This abundance of shoreline translates to a multitude of rock exposed by waves and currents. Nearly the entire history of Earth is on display in Michigan, from 3.6-billion-year-old gneisses to potholes drilled by modern rivers. Michigan Rocks! guides you to 56 world-class geologic sites scattered from Isle Royale and the Upper Peninsula to Lower Michigan, including ...