John will share the geologic history of the area located around the end of the trail, from 2.6 billion year old Archean granites to the Pleistocene glacial epoch (Magnetic Rock).
John is a Minnesota native, he taught at Macalester College for 32 years, traveled the world researching geology, and has now retired to the Gunflint Trail.
The presentation is free and family friendly – donations are always appreciated.
Masks will be mandatory during the indoor presentation.
