Cornwallius is an extinct herbivorous marine mammal of the family Desmostylidae. Cornwallius lived along the North American Pacific Coast from the Early Oligocene (Chattian) through the Oligocene and existing for approximately 7.8 million years.
The Cedar District Formation is a geologic formation exposed on Vancouver Island, the Gulf Islands of British Columbia and San Juan Islands of Washington (state). It preserves fossils dating back to the Campanian Epoch of the Cretaceous period. It dates to the lower mid-Campanian.
The Rosella Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Cambrian period.
The Brothers Peak Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Cretaceous period. An unnamed pachycephalosaurin is known from the formation.
The Comox Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Cretaceous period.
The Devils Claw Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Cretaceous period.
The Newcastle Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Cretaceous period.
The Protection Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Cretaceous period.
The Spray Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Cretaceous period.
The Pender Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Cretaceous period. Organisms that have been recovered from this formation include indeterminate Elasmosaurids, Mosasaurids, and a Chelonioidean, as well as the sea turtle Desmatochelys and the Mosasaurine Kourisodon.
The Dunedin Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Devonian period.
The Byng Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Ediacaran period.
The Graham Island Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Jurassic period.
The Sandilands Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Triassic and Jurassic period.
The Whiteaves Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Jurassic period.
The Kechika Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Ordovician period.
The Sooke Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Paleogene period.
The Buttle Lake Formation is a geologic formation in British Columbia, Canada. It preserves fossils dating back to the Permian period.
The Quatsino Limestone is a geologic formation in British Columbia. It preserves fossils dating back to the Triassic period.
The Nanaimo Group is a geologic group in both British Columbia and Washington state. It preserves fossils dating back to the Cretaceous period.
