The Olmos Formation is a geologic formation in Mexico. It preserves fossils of plants, hadrosaurs like Kritosaurus, ceratopsians, tyrannosaurs and the turtle Palauchelys montellanoi dating back to the Cretaceous period.
7. Oliver A. López-Conde, Adán Pérez-GarcÃÂa, MarÃÂa L. ChavarrÃÂa-Arellano, Jesús Alvarado-Ortega, A new bothremydid turtle (Pleurodira) from the Olmos Formation (upper Campanian) of Coahuila, Mexico, Cretaceous Research, Volume 119.