Title: Mesozoic formations in the Comobabi and Roskruge Mountains, Papago Indian Reservation, Arizona
Subjects: Formations (Geology), Geology, Nomenclature, Sedimentary Rocks, Stratigraphic Geology, Stratigraphic correlation, Volcanic ash, tuff
Places: Arizona, Tohono O'Odham Indian Reservation
Time periods: Mesozoic