Fort Crittenden FormationThe Fort Crittenden Formation is a geological formation in Arizona whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.Vertebrate paleofaunaArchosaursTyrannosauridae fossils attributed to Gorgosaurus have been unearthed here.LepidosaursTeiid and anguid lizards are known from the formation.