Gunflint Trail Field Trip, Fall 2008
#10 of 44
One of the geological points of interest in the river bottom was this little pothole with a stone "tool" in it. The tool rolls around in the high water when floodwaters rush over it, thus enlarging the pothole.
Keywords:DSC_0504.jpg, Gunflint Trail Field Trip, Fall 2008
18 October 2008