Title: Lithologic studies of fine-grained upper Cretaceous sedimentary rocks of the Black Hills region
First published: 1930
Subjects: Formations (Geology), Geology, Stratigraphic, Petrology, Rocks, Sedimentary, Sedimentary Rocks, Stratigraphic Geology, Sedimentary rocks, Geology
Places: Black Hills (S.D. and Wyo.), Montana, Wyoming
Time periods: Cretaceous