TY - BOOK AU - Southwick,D.L. AU - Morey,G.B. AU - Holst,Timothy B. TI - Tectonic imbrication and foredeep development in the Penokean orogen, east-central Minnesota--an interpretation based on regional geophysics and the results of test-drilling U1 - 551.71509776 PY - 1991/// CY - Washington PB - U.S. Dept. of the Interior, U.S. Geological Survey KW - Geology, Stratigraphic KW - Proterozoic KW - Geology KW - Minnesota KW - Geology, Structural KW - Plate tectonics KW - Michigan N1 - Chapters C and D are issued as a single volume and are not available separately ER -