Contributions to Late Cretaceous Stratigraphy and Paleontology, Western Montana (Chapters A-C)

摘要

;Contents: Redefinition of Frontier Formation-Beaverhead Group contact, Lima Peaks area, southwestern Montana and southeastern Idaho; Biostratigraphic correlation of Santonian and Campanian formations in the northwestern part of Yellowstone National Park, and the Madison Range and Livingston area of southwestern Montana; and Occurrence and significance of the middle Turonian (Upper Cretaceous) belemnite Actinocamax in central western Montana.