Cerro Fortaleza Formation
The Cerro Fortaleza Formation, in older literature described as Pari Aike Formation, is a Late Cretaceous geologic formation of Cenomanian age of the Austral Basin in southern Patagonia, Argentina.Description
The sandstones of the formation were deposited in a fluvial environment. The formation has an estimated thickness of and overlies the Anita Formation, while it is overlain by the La Irene Formation. These formations are considered Campanian & Maastrichtian in age, respectively, making the Cerro Fortaleza Formation aged between them.
The giant titanosaurs Puertasaurus and Dreadnoughtus, the megaraptoran Orkoraptor, Austrocheirus isasii, and the ornithopod Talenkauen have been recovered from the formation alongside turtles and crocodiles.
