Apón Formation

Geological formation in the northwestern Venezuela and northern Colombia
Apón Formation is located in Venezuela
Apón Formation
Apón Formation (Venezuela)

The Apón Formation is a geological formation in northwestern Venezuela (Maracaibo Basin) and northern Colombia (La Guajira),[1] whose thick-bedded limestone interbedded with subordinate amounts of dark gray calcareous shale and sandy shale strata date back to the Early Cretaceous (Late Aptian epoch).[2] Pterosaur remains of Ornithocheiridae indet. (=?Anhangueridae indet.) are among the fossils that have been recovered from the formation.[3]

Fossil content

The following fossils, among others, have been found in the Apón Formation at Toas island: Spiroculina sp., Orbitolina concava, Gryphaeostrea, Amphidonte (Ceratostreon) boussingaulti, Ostrea sp., Amphitriscoelus waringi, Requienia sp., Parahoplites sp., Cheloniceras sp., Quinqueloculina sp., Triloculina sp.,[2] and Panopea (Myopsis) plicata in Río Negro.[4]

See also

References

  1. ^ García González et al., 2010
  2. ^ a b Apón Formation (Toas Island) at Fossilworks.org
  3. ^ Barrett et al., 2008, p.84
  4. ^ Apón Formation (Río Negro) at Fossilworks.org

Bibliography

  • Barrett, P.M.; R.J. Butler; N.P. Edwards, and A.R. Milner. 2008. Pterosaur distribution in time and space: an atlas. pp.61-107. in Flugsaurier: Pterosaur papers in honour of Peter Wellnhofer. Hone, D.W.E., and Buffetaut, E. (eds), 1–264. 28; Zitteliana B. Accessed 2017-03-31.
  • García González, Mario; Ricardo Mier Umaña, and Luis Enrique Cruz Guevara. 2010. Reconstrucción de la historia paleotermal de la subcuenca de la Baja Guajira, Colombia. Boletín de Geología 32. . Accessed 2017-03-31.