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.Xert Formation at Fossilworks.org
Fossil content Dinosaurs Tastavinsaurus sanziWeishampel et al., 2004, pp. 517-607
Invertebrates Bivalvia indet. Gastropoda indet.
Flora Plantae indet.
Correlation
See also
List of dinosaur-bearing rock formations List of stratigraphic units with few dinosaur genera
References
Bibliography
Further reading G. Cuenca Bescós, O. Amo, J. L. Barco, J. I. Canudo, R. Royo Torres and J. I. Ruiz Omeñaca. 1999. Dinosaurios de Aragón [Dinosaurs of Aragon]. Zubía 17:235-257