Urbión Group
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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.[1] 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.
Quick Facts Type, Sub-units ...
Urbión Group | |
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Stratigraphic range: Late Hauterivian-late Barremian ~130–121 Ma | |
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 | 42.1°N 2.3°W / 42.1; -2.3 |
Approximate paleocoordinates | 32.4°N 9.0°E / 32.4; 9.0 |
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 |
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Dinosaur remains are among the fossils that have been recovered from the formation.[2]