Minnesota Geological Survey
Report of Investigations  RI-53.

Contributions to the Geology of the Virginia Horn Area, St. Louis County, Minnesota, Mark A. Jirsa and G.B. Morey, Editors, 2003, 4 chapters, 135 p.

The pdf report should be viewed using Acrobat Reader 4.0 or higher
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Also available as a printed report; contact the MGS Map Sales office at 612-627-4780, ex. 238 for price and availability.