Even so, the Alaska North Slope has no fossils of large cold-blooded animals such as lizards and crocodilians, which were common at the same time in Alberta, Montana, and Wyoming.
Pa ipak, u North Slopeu nisu pronađeni fosili velikih hladnokrvnih životinja poput guštera i krokodila, koji su u isto vrijeme bili česti u Alberti, Montani i u Wyomingu.