English Morton Gneiss Cited by user McGhiever on 23 May 2019 Morton Gneiss, also known as Rainbow Gneiss, is an Archean-age gneiss found in the Minnesota River Valley of southwestern Minnesota, United States.
English Great Lakes tectonic zone Cited by user Bettymnz4 on 30 Mar 2010 The Great Lakes tectonic zone is bounded by South Dakota at its tip and heads northeast to south of Duluth, Minnesota, then heads east through northern Wisconsin…