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Gunflint Trail Field Trip, Fall 2008

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Thomson Dam

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Thomson Dam
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Thomson Dam
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.

Photo:

Tim Vick

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DSC_0504.jpg, Gunflint Trail Field Trip, Fall 2008
18 October 2008

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Field Trips