Title: The Cretaceous-Tertiary boundary in the San Juan and Raton Basins, New Mexico and Colorado
Subjects: Cretaceous-Tertiary boundary, Geology, Cretaceous-Paleogene boundary, Cretáceo, Terciário, Stratigraphic Geology
Places: San Juan Basin (N.M. and Colo.), New Mexico, Colorado, Raton Basin (Colo. and N.M.)