Xert Formation

Xert Formation Stratigraphic range: Late Barremian ~122–120 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Underlies	Forcall Formation
Overlies	Artoles Formation, Arcillas de Morella Formation
Lithology
Primary	Limestone, marl
Other	Claystone, chert
Location
Coordinates	40°42′N 0°06′E / 40.7°N 0.1°E / 40.7; 0.1Coordinates: 40°42′N 0°06′E / 40.7°N 0.1°E / 40.7; 0.1
Approximate paleocoordinates	30°06′N 10°12′E / 30.1°N 10.2°E / 30.1; 10.2
Region	Aragón
Country	Spain
Extent
Type section
Named for	Chert
Xert Formation (Spain) Show map of Spain Xert Formation (Aragon) Show map of Aragon

The Calizas y margas de Xert Formation or Xert Formation is an Early Cretaceous (late Barremian) geologic formation of the and 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]

Fossil content[]

Dinosaurs

• Tastavinsaurus sanzi^[1][2]

Invertebrates

• Bivalvia indet.^[1]
• Gastropoda indet.

Flora

• Plantae indet.^[1]

Correlation[]

Early Cretaceous stratigraphy of Iberia

Ma	Age	Paleomap \ Basins		Olanyà								Lusitanian
100	Cenomanian											Caranguejeira
125	Albian		-
			Monte Grande		Escucha		Escucha
			-
	Aptian		-		- Castrillo
					En Gp. -	Morella/			Morella
			-		En Gp. -	Forcall					Upper Bedoulian
	Barremian					Xert	Alacón	Xert		Huérguina
						Artoles				Collado		Papo Seco
				Rúbies	Tera Gp. -	Alacón/Blesa	Blesa	Camarillas
150	Hauterivian				Ur Gp. -			Castellar	Tera Gp. -
							hiatus
	Valanginian				Ur Gp. -				-
					-				- Piedrahita
	Berriasian		-			hiatus
					- Rupelo			Arzobispo	hiatus
					On Gp. -
	Tithonian		Lastres		Tera Gp. -		Higuereles			Tera Gp. -		Lourinhã
									Arzobispo
Legend		Major fossiliferous, oofossiliferous, ichnofossiliferous, coproliferous, minor formation
Sources

See also[]

• Mesozoic Spain
• List of dinosaur-bearing rock formations
  • List of stratigraphic units with few dinosaur genera

References[]

Bibliography[]

• Weishampel, David B.; Peter Dodson, and Halszka Osmólska (eds.). 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21.ISBN 0-520-24209-2

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