You may have heard that Minnesota's ten thousand lakes are the hoofprints of Paul Bunyan's big blue ox, Babe. "Don't you believe it!" writes author Dick Ojakangas. Though the lakes, which formed at t
Have you ever wondered how the Mississippi River was formed? Or why shark teeth have been found in the Iron Range of the Upper Midwest? Towering mountain ranges, explosive volcanoes, expansive glacier
This volume presents contributions resulting from the Tenth International Basement Tectonics Conference, held in Duluth, Minnesota, USA in August 1992. The first three parts -- the Rift Systems, Ba
