Arén Formation

The Arén Formation or Arén Sandstone (Catalan: Calcàries i gresos d’Areny)[1] is a geological formation in the Tremp-Graus Basin around Arén, Catalonia, Spain whose strata date back to the Late Cretaceous.[2] Dinosaur remains are among the fossils that have been recovered from the formation.[3] The formation dates to the Campanian to Maastrichtian and underlies the Tremp Group.

Arén Formation
Stratigraphic range: Campanian-Maastrichtian
~84–66 Ma
TypeGeological formation
Unit ofTremp-Graus Basin
UnderliesTremp Group
Lithology
PrimarySandstone
OtherLimestone
Location
Coordinates42.3°N 1.6°E / 42.3; 1.6
Approximate paleocoordinates34.0°N 1.6°E / 34.0; 1.6
RegionLérida
Country Spain
Type section
Named forArén
Arén Formation (Spain)
Arén Formation (Catalonia)

Fossil content

Dinosaurs
Paleogeography of the Maastrichtian and distribution of titanosaur nesting sites

Dinosaur eggs (Megaloolithus baghensis,[4] Sankofa pyrenaica),[5] sauropod tracks, unnamed sauropod remains, theropod tracks, euornithopod tracks, and an unnamed iguanodont remains present in Lérida Province.

Dinosaurs of the Arén Formation
GenusSpeciesLocationStratigraphic positionAbundanceNotesImages
Ricardoestesia[6] Indeterminate[6] Lérida[7]
Hypselosaurus[7] Indeterminate[7] Lérida[7] Later found to be unknown sauropod remains[7]
Orthomerus[7] Indeterminate[7] Lérida[7]
Pararhabdodon[7] P. isonensis[7] Lérida[7]
Rhabdodon[7] R. priscus[7] Lérida[7]
Titanosaurus[8] T. indicus[8] Lérida[7] Later found to be indeterminate sauropod remains[7]

See also
  • List of dinosaur-bearing rock formations

References
  1. Arengol Segú, 2014, p.31
  2. Arén Formation at Fossilworks.org
  3. Weishampel et al., 2004, pp.588-593
  4. Prieto Márquez et al., 2001
  5. López Martínez & Vicens, 2012
  6. Listed as "cf. Ricardoestesia sp." in "15.8 Provincia de Lleida, Spain; 1. Arén Formation," in Weishampel, et al. (2004). Page 591.
  7. "15.8 Provincia de Lleida, Spain; 1. Arén Formation," in Weishampel, et al. (2004). Page 591.
  8. Listed as "Titanosaurus cf. indicus" in "15.8 Provincia de Lleida, Spain; 1. Arén Formation," in Weishampel, et al. (2004). Page 591.

Bibliography
  • Arengol Segú, Àngels. 2014. Guia de camp - TRANSCATALÒNIA 2014 - Comarca del Pallars Jussà (Conca Dellà i de Tremp), 1–82. Delegació Territorial de Catalunya. Accessed 2020-07-14.
  • López Martínez, N., and E. Vicens. 2012. A new peculiar dinosaur egg, Sankofa pyrenaica oogen. nov. oosp. nov. from the Upper Cretaceous coastal deposits of the Aren Formation, South-Central Pyrenees, Lleida, Catalonia, Spain. Palaeontology 55. 325–339.
  • 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
  • Prieto Márquez, A.; R. Gaete; A. Galobart, and L. Ardèvol. 2001. A Richardoestesia-like theropod tooth from the Late Cretaceous foredeep, south-central Pyrenees, Spain. Eclogae Geologicae Helveticae 93. 497–501. Accessed 2020-07-14.

Further reading
  • N. López Martínez. 2000. Eggshell sites from the Cretaceous-Tertiary transition in south-central Pyrenees (Spain). In A. M. Bravo & T. Reyes (ed.), First International Symposium on Dinosaur Eggs and Babies, Extended Abstracts 95-115
  • P. M. Sander, C. Peitz, J. Gallemi and R. Cousin. 1998. Dinosaurs nesting on a red beach?. Comptes Rendus de l'Académie des Sciences, Paris: Sciences de la Terre et des Planètes 327:67-74
  • J. Gallemi, R. Martinez, and J. M. Pons. 1983. Coniacian-Maastrichtian of the Tremp Area (South Central Pyrenees). Newsletters on Stratigraphy 12(1):1-17
  • A. Liebau. 1973. El Maastrichtiense lagunar ("Garumniense") de Isona [The lagoonal Maastrichtian ("Garumnian") of Isona]. XIII Coloquio Europeo de Micropaleontología 87-112
  • J. Rosell. 1967. Estudio geológico del sector del prepirineo comprendido entre los ríos Segre y Noguera Ribagorzana (Provincia de Lérida) [Geological study of the pre-Pyrenean sector between the Segre and Noguera Ribagorzana rivers (Lérida province)]. Pirineos 21(75–78):5-225
  • A. F. d. Lapparent and E. Aguirre. 1956. Algunos yacimientos de Dinosaurios en el Cretácico Superior de la Cuenca de Tremp [Some dinosaur localities in the Upper Cretaceous of the Termp Basin]. Estudios Geológicos 12(31/32):377-382
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