TY - RPRT TI - Thick-skinned, south-verging backthrusting in the Felch and Calumet troughs area of the Penokean Orogen, northern Michigan AU - J. S. Klasner AU - P. K. Sims PY - 1993 DO - 10.3133/b1904l UR - https://pubs.usgs.gov/publication/b1904L ID - b1904L ER -