Xert Formation
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The Calizas y margas de Xert Formation or Xert Formation is an Early Cretaceous (late Barremian) geologic formation of the Maestrazgo and Galve Basins in central-eastern Spain. The formation is described as a coastal claystone, with indications of a transgressive episode, marked by the transition from marsh facies, with little marine influence, to marine platform facies evidenced by abundant marine invertebrates.[1]
Quick Facts Type, Underlies ...
Xert Formation | |
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Stratigraphic range: Late Barremian ~122–120 Ma | |
Type | Geological formation |
Underlies | Forcall Formation |
Overlies | Artoles Formation, Arcillas de Morella Formation |
Lithology | |
Primary | Limestone, marl |
Other | Claystone, chert |
Location | |
Coordinates | 40.7°N 0.1°E / 40.7; 0.1 |
Approximate paleocoordinates | 30.1°N 10.2°E / 30.1; 10.2 |
Region | Aragón |
Country | Spain |
Extent | Maestrazgo Basin Galve Basin |
Type section | |
Named for | Chert |
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