Castrillo de la Reina Formation

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]

Castrillo de la Reina Formation
Stratigraphic range: late Barremian-early Aptian ~125 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Unit of	Oliván Group
Underlies	Utrillas & Escucha Formations
Overlies	Hortigüela & Leza Formations
Lithology
Primary	Claystone
Other	Sandstone
Location
Coordinates	42.0°N 3.3°W / 42.0; -3.3
Approximate paleocoordinates	32.6°N 8.2°E / 32.6; 8.2
Region	Castile and León
Country	Spain
Extent	Cameros Basin
Castrillo de la Reina Formation (Spain)

Fossil content

Correlation

Early Cretaceous stratigraphy of Iberia

Ma	Age	Paleomap \ Basins	Cantabrian	Olanyà	Cameros	Maestrazgo	Oliete	Galve	Morella	South Iberian	Pre-betic	Lusitanian
100	Cenomanian		La Cabana	Sopeira	Utrillas		Mosquerela					Caranguejeira
			Altamira		Utrillas
			Eguino
125	Albian		Ullaga - Balmaseda	Lluçà						Traiguera
			Monte Grande		Escucha		Escucha			Jijona
			Itxina - Miono
	Aptian		Valmaseda - Tellamendi		Ol Gp. - Castrillo	Benassal		Benassal				Olhos
				Font	En Gp. - Leza	Morella/Oliete	Oliete	Villaroya	Morella	Capas Rojas		Almargem
			Patrocinio - Ernaga	Senyús	En Gp. - Jubela	Forcall				Villaroya	Upper Bedoulian	Figueira
	Barremian		Vega de Pas	Cabó	Abejar	Xert	Alacón	Xert		Huérguina		Assises
				Prada		Artoles				Collado	Moutonianum	Papo Seco
				Rúbies	Tera Gp. - Golmayo	Alacón/Blesa	Blesa	Camarillas	Mirambel
150	Hauterivian				Ur Gp. - Pinilla	Llacova		Castellar	Tera Gp. - Pinilla	Villares		Porto da Calada
							hiatus
						Huerva			Gaita
	Valanginian		Villaro		Ur Gp. - Larriba				Ped Gp. - Hortigüela
					Ped Gp. - Hortigüela				Ped Gp. - Piedrahita
					Peñacoba			Galve		Miravetes
	Berriasian		Cab Gp. - Arcera		Valdeprado	hiatus		Alfambra
					TdL Gp. - Rupelo			Arzobispo	hiatus	Tollo
					On Gp. - Huérteles Sierra Matute
	Tithonian		Lastres		Tera Gp. - Magaña		Higuereles			Tera Gp. - Magaña		Lourinhã
									Arzobispo
					Ágreda
Legend		Major fossiliferous, oofossiliferous, ichnofossiliferous, coproliferous, minor formation
Sources

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. doi:10.4202/app.2010.0003. ISSN 0567-7920.
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. doi:10.7717/peerj.3409. ISSN 2167-8359. PMC 5490465. PMID 28674644.
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. Bibcode:2024JIbG...50...67E. doi:10.1007/s41513-023-00227-5. ISSN 1698-6180.
4. Dieudonné, Paul-Emile; Tortosa, Thierry; Torcida Fernández-Baldor, Fidel; Canudo, José Ignacio; Díaz-Martínez, Ignacio (2016-06-22). Farke, Andrew A. (ed.). "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. 11 (6): e0156251. Bibcode:2016PLoSO..1156251D. doi:10.1371/journal.pone.0156251. ISSN 1932-6203. PMC 4917257. PMID 27333279.
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. Bibcode:2013CrRes..41..127H. doi:10.1016/j.cretres.2012.11.005.