Richard W Ojakangas

You may have heard that Minnesota's ten thousand lakes are the hoofprints of Paul Bunyan's ox, Babe. "Don't you believe it!" writes Richard Ojakangas, author of the newly released Roadside Geology of Minnesota. Though the lakes, which formed at the end of the most recent ice age, may be Minnesota's most famous features, the glaciated countryside disguises a much longer history of volcanoes and plate collisions-not surprising when you learn that Minnesota...