| Castrillo de la Reina Formation | |
|---|---|
| Stratigraphic range: late Barremian-early Aptian ~ | |
| Type | Geological formation |
| Unit of | Oliván Group |
| Underlies | Utrillas & Escucha Formations |
| Overlies | Hortigüela & Leza Formations |
| Lithology | |
| Primary | Claystone |
| Other | Sandstone |
| Location | |
| Coordinates | 42°00′N3°18′W / 42.0°N 3.3°W |
| Approximate paleocoordinates | 32°36′N8°12′E / 32.6°N 8.2°E |
| Region | Castile and León |
| Country | Spain |
| Extent | Cameros Basin |
  Castrillo de la Reina Formation (Spain) | |
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, an early rhabdodontoid (indeterminate) [4] and the lizard Arcanosaurus . [5]
