Cretaceous Montana

geological formation

Infernodrakon (meaning "dragon from hell") is a genus of azhdarchid pterosaurs from the Late Cretaceous Hell Creek Formation of Montana, United States. The genus contains a single species, I. hastacollis, known from a single neck vertebra. Based on comparisons with related azhdarchids, it probably had a wingspan of about .

geological formation in North America

geological formation in Canada

geological formation

geologic formation in the Great Plains of North America

Spheroolithus is an oogenus of dinosaur egg.