Belly River Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Belly River Formation
RTAlberta
 Saskatchewan
 Oldman Formation
SNHas been considered equivalent to Two Medicine Formation and Virgelle Sandstone of Blackfoot Indian Reservation, N Montana, and Judith River Formation, Claggett Formation, and Eagle Sandstone of central Montana.