Type Geological formation Overlies Los Adobes Formation Region Chubut Province | Unit of Chubut Group Country Argentina Underlies La Colonia Formation | |
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Sub-units Puesto Manuel Arce
Bayo Overo
Las Plumas
Cerro Castaño
La Paloma | ||
The Cerro Barcino Formation (also known as the Gorro Frigio Formation) is a geological formation in South America whose strata span the mid-late Cretaceous period. Dinosaur remains are among the fossils that have been recovered from the formation.
The Cerro Barcino Formation is the upper unit of the Chubut Group, which also includes the older Los Adobes Formation. Both formations cover a vast area in Chubut Province, Argentina. The two formations are distinguished by geological features suggesting a distinct change in climate, from a wetter, flood plain environment in the Los Adobes to a much more arid, desert-like environment in the Cerro Barcino.
The Cerro Barcino Formation is subdivided into several subunits ("members"). From oldest to youngest:
The final three members are likely Albian to Campanian in age (112 to 83 million years ago), while the La Paloma may date to the latest Hauterivian (130ma).
Fauna
Indeterminate abelisaurid remains. Possible indeterminate carcharodontosaurid remains. Indeterminate Titanosauria remains. Also, an unnamed titanosauriform.