The Adaffa Formation is a geological formation in Saudi Arabia, and the lowermost unit of the Suqah Group. It dates back to the Campanian of the Late Cretaceous. The lithology consists of sandstone, siltstone and marl, with a basal granitic conglomerate with phosphatic nodules. Also present are ferricrete horizons. It was deposited in marginal marine conditions close to land. Fish, marine reptile and dinosaur remains have been recovered from the formation.
Vertebrate paleofauna Fish Fish of the Adaffa FormationGenus Species Location Stratigraphic position Abundance Notes Images Ceratodus Indeterminate Toothplates Lungfish cf. Enchodus Indeterminate Teeth cf. Protosphyraena Indeterminate Teeth Pachycormid ?Anacoracidae Indeterminate Vertebrae Lepisosteidae Indeterminate Vertebral centra Pycnodontiformes Indeterminate Teeth
Crocodyliformes Crocodyliformes of the Adaffa Formation Genus Species Location Stratigraphic position Abundance Notes Images Dyrosauridae Indeterminate Two vertebrae Crocodyliformes Indeterminate Cranial fragment
Plesiosaurians Plesiosaurians of the Adaffa Formation Genus Species Location Stratigraphic position Abundance Notes Images Elasmosauridae Indeterminate Rostral portion of a skull
Squamates Squamates of the Adaffa Formation Genus Species Location Stratigraphic position Abundance Notes Images Prognathodon Indeterminate Teeth Mosasaur cf. Pachyvaranus Indeterminate Vertebrae Aquatic varanoid Mosasauridae Pygal vertebra Plioplatecarpinae Indeterminate Dorsal vertebra
Turtles Turtles of the Adaffa Formation Genus Species Location Stratigraphic position Abundance Notes Images Bothremydidae Indeterminate Shell fragments and a femur
Non-avian Dinosaurs Dinosaurs of the Adaffa Formation Genus Species Location Stratigraphic position Abundance Notes Images Abelisauridae Indeterminate Two teeth Titanosauria Indeterminate Seven caudal vertebrae, seemingly from the same individual
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