Stratigraphy, petrography, and environment of deposition of the Frontier Formation on the western margin of the Crazy Mountains Basin, south central Montana

Tonnsen, John Joseph2015-05-122015-05-121975https://scholarworks.montana.edu/handle/1/4152enGeologyStratigraphy, petrography, and environment of deposition of the Frontier Formation on the western margin of the Crazy Mountains Basin, south central MontanaThesisCopyright 1975 by John Joseph Tonnsen