| Villalba de la Sierra Formation | |
|---|---|
| Stratigraphic range: Campanian-Maastrichtian ~ | |
 Excavation of a titanosaur at Lo Hueco | |
| Type | Geological formation |
| Lithology | |
| Primary | Mudstone |
| Other | Sandstone, gypsum |
| Location | |
| Coordinates | 40°00′N 2°00′W / 40.0°N 2.0°W |
| Approximate paleocoordinates | 30°42′N 0°36′W / 30.7°N 0.6°W |
| Region | Castilla-La Mancha |
| Country |  Spain |
| Extent | Iberian Ranges |
| Type section | |
| Named for | Villalba de la Sierra |
  Villalba de la Sierra Formation (Spain) | |
The Villalba de la Sierra Formation is a Campanian to Maastrichtian geologic formation in Spain. Fossil dinosaur eggs have been reported from the formation, that comprises gypsiferous, grey, argillaceous mudstones and sandstones, deposited in a floodplain environment[1][2] characterised by high seasonality and variability in water availability.[3]
- ^ Lo Hueco, Fuentes (G1) at Fossilworks.org
- ^ Weishampel et al., 2004, pp.517-607
- ^ Peyrot, Daniel; Barroso-Barcenilla, Fernando; Cambra-Moo, Oscar (1 October 2013). "Paleoecology of the late Campanian/early Maastrichtian Fossil-Lagerstätte of "Lo Hueco" (Cuenca, Spain): Palynological insights". Palaeogeography, Palaeoclimatology, Palaeoecology. 387: 27–39. Bibcode:2013PPP...387...27P. doi:10.1016/j.palaeo.2013.07.005. Retrieved 22 November 2022.