Xert Formation
Introduction 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.
Fossil content ;Dinosaurs* ''Tastavinsaurus sanzi'';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