Spring 1980
The occurrence and chemistry of epidote-clinozoisites in mafic gneisses from the Ruby Range, southwestern Montana
P. S. Dahl; L. M. Friberg
Foreland deformation; compression as a cause
D. L. Blackstone
Early Cenozoic mammalian paleontology, geologic structure, and tectonic history in the Overthrust Belt near LaBarge, western Wyoming
John A. Dorr; Philip D. Gingerich
Paleobiology and depositional setting of a Late Cretaceous vertebrate locality, Hell Creek Formation, McCone County, Montana
Carter Lupton; Diane Gabriel; Robert M. West
A titanothere from the Green River Formation, central Utah; Teleodus uintensis (Perissodactyla; Brontotheriidae)
Michael E. Nelson; James H. Madsen; W. Lee Stokes
Eocene perissodactyls from the type section of the Tepee Trail Formation of northwestern Wyoming
Bruce J. MacFadden