Urbión Group
| Urbión Group | |
|---|---|
| Stratigraphic range: Late Hauterivian-late Barremian ~ | |
Lake Urbíon near the summit of Pico del Urbión | |
| Type | Geological formation |
| Sub-units | Pinilla de los Moros, Castrillo de la Reina, Larriba & Piedrahita de Muñó Formations |
| Underlies | Enciso Group |
| Overlies | Oncala Group |
| Lithology | |
| Primary | Limestone, sandstone |
| Other | Claystone, conglomerate |
| Location | |
| Coordinates | 42°06′N 2°18′W / 42.1°N 2.3°W |
| Approximate paleocoordinates | 32°24′N 9°00′E / 32.4°N 9.0°E |
| Region | Burgos & Soria provinces, Castille and León La Rioja |
| Country | Spain |
| Extent | Cameros Basin, Sierra de la Demanda |
| Type section | |
| Named for | Picos de Urbión |
The Urbión Group is a geological group in Castile and León and La Rioja, Spain whose strata date back to the Early Cretaceous (late Hauterivian to late Barremian. The formations of the group comprise a sequence of brown limestones in a matrix of black silt, sandstones, claystones and conglomerates deposited under terrestrial conditions, in alluvial fan and fluvial environments.
Dinosaur remains are among the fossils that have been recovered from the formation.