Download or read book Roadside Geology of Minnesota written by Richard W. Ojakangas and published by Roadside Geology. This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Minnesota's lakes may be its most famous features, but the glaciated countryside disguises a much longer history of volcanoes and plate collisions--not surprising when you learn that Minnesota was at the active edge of the fledgling North American continent for several billion years.