Castrillo de la Reina Formation explained

Castrillo de la Reina Formation
Period:	Barremian
Age:	late Barremian-early Aptian ~
Type:	Geological formation
Prilithology:	Claystone
Otherlithology:	Sandstone
Unitof:	Oliván Group
Underlies:	Utrillas & Escucha Formations
Overlies:	Hortigüela & Leza Formations
Coordinates:	42°N -3.3°W
Paleocoordinates:	32.6°N 8.2°W
Region:	Castile and León
Country:	Spain
Extent:	Cameros Basin

The Castrillo de la Reina Formation is a geological formation in Spain. It is late Barremian to early Aptian in age. It interpreted as a fluvial deposit. It primarily consists of red clay, with ribbon shaped sandstone channel fills. The rebbachisaurid dinosaur Demandasaurus occurs in the formation,^[1] alongside somphospondylan Europatitan^[2] as well as indeterminate small ornithopods, iguanodonts (including members of the Hadrosauriformes^[3]) and spinosaurids, the earliest known stem-rhabdodontid (indeterminate)^[4] and the lizard Arcanosaurus.^[5]

Notes and References

1. Fernández-Baldor. Fidel Torcida. Canudo. José Ignacio. Huerta. Pedro. Montero. Diego. Suberbiola. Xabier Pereda. Salgado. Leonardo. September 2011. Demandasaurus darwini, a New Rebbachisaurid Sauropod from the Early Cretaceous of the Iberian Peninsula. Acta Palaeontologica Polonica. 56. 3. 535–552. 10.4202/app.2010.0003. 0567-7920. free.
2. Torcida Fernández-Baldor. Fidel. Canudo. José Ignacio. Huerta. Pedro. Moreno-Azanza. Miguel. Montero. Diego. 2017-06-27. Europatitan eastwoodi, a new sauropod from the lower Cretaceous of Iberia in the initial radiation of somphospondylans in Laurasia. PeerJ. 5. e3409. 10.7717/peerj.3409. 2167-8359. 5490465. 28674644 . free .
3. Escanero-Aguilar . D. . Torcida Fernández-Baldor . F. . Pereda-Suberbiola . X. . Huerta . P. . 2024-04-03 . Skull material of an early cretaceous hadrosauriform dinosaur (Ornithopoda) from Salas de los Infantes (Burgos, Spain) . Journal of Iberian Geology . 50 . 1 . 67–82 . en . 10.1007/s41513-023-00227-5 . 2024JIbG...50...67E . 1698-6180.
4. Dieudonné. Paul-Emile. Tortosa. Thierry. Torcida Fernández-Baldor. Fidel. Canudo. José Ignacio. Díaz-Martínez. Ignacio. 2016-06-22. Farke. Andrew A.. An Unexpected Early Rhabdodontid from Europe (Lower Cretaceous of Salas de los Infantes, Burgos Province, Spain) and a Re-Examination of Basal Iguanodontian Relationships. PLOS ONE. en. 11. 6. e0156251. 10.1371/journal.pone.0156251. 1932-6203. 4917257. 27333279. 2016PLoSO..1156251D . free .
5. Houssaye. Alexandra. Rage. Jean-Claude. Torcida Fernández-Baldor. Fidel. Huerta. Pedro. Bardet. Nathalie. Pereda Suberbiola. Xabier. April 2013. A new varanoid squamate from the Early Cretaceous (Barremian–Aptian) of Burgos, Spain. Cretaceous Research. 41. 127–135. 10.1016/j.cretres.2012.11.005. 2013CrRes..41..127H .