Title: The Penokean orogeny in Minnesota and upper Michigan
First published: 1991
Subjects: Folds (Geology), Geology, Stratigraphic, Geology, Structural, Orogeny, Plate tectonics, Rock deformation, Stratigraphic Geology, Structural Geology, Thrust faults (Geology), Geology
Places: Michigan, Minnesota, Upper Peninsula
Time periods: Precambrian, Proterozoic
LC classification: QE75 .B9 no. 1904-C-D, QE653.5 .B9 no. 1904-C-D