Cerro Barcino Formation
| Cerro Barcino Formation Stratigraphic range: Hauterivian–Campanian |
|
|---|---|
| Type | Geological formation |
| Unit of | Chubut Group |
| Sub-units | Puesto Manuel Arce Bayo Overo Las Plumas Cerro Castaño La Paloma |
| Underlies | La Colonia Formation, Paso de Sapo Formation, Lefipan Formation |
| Overlies | Los Adobes Formation |
| Location | |
| Region | Chubut Province |
| Country |
 Argentina
|
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).
Indeterminate abelisaurid remains. Possible indeterminate carcharodontosaurid remains. Indeterminate Titanosauria remains. Also, an unnamed titanosauriform.
B. gradilis
Near El Escorial village, Chubut Province.
Cerro Castaño Member.
"Skull, mandible, and postcranial remains."
A peirosaurid. The first crocodyliform from the Chubut Group.
Chubutisaurus insignis
Present in the Bayo Overo Member.
"[Two] partial skeletons including most limb elements and caudal vertebrae."
A titanosaur.
Genyodectes serus
...
Wikipedia