Isachsen Formation
The Isachsen Formation is a geologic formation in the Northwest Territories and Nunavut. It preserves fossils of Polycotylidae indet., dating back to the Aptian stage of the Cretaceous period.
The Isachsen Formation is a geologic formation in the Northwest Territories and Nunavut. It preserves fossils of Polycotylidae indet., dating back to the Aptian stage of the Cretaceous period.