D. Dale Condit 1919 The object of this paper is twofold - to present evidence found in southwestern Montana concerning the great Jurassic base-leveling and its bearing on the solution of certain stratigraphic problems involving late Paleozoic, Triassic, and Jurassic formations, and to set forth the relations of those formations to beds in western Wyoming. application/pdf 10.3133/pp120F en Relations of late Paleozoic and early Mesozoic formations of southwestern Montana and adjacent parts of Wyoming reports