Apón Formation
Apón Formation Stratigraphic range: Early Cretaceous (Late Aptian) | |
---|---|
Type | Geological formation |
Underlies | Aguardiente Formation |
Overlies | Río Negro Formation |
Lithology | |
Primary | Limestone |
Other | Calcareous and sandy shales |
Location | |
Coordinates | 10°57′30″N 71°38′50″W / 10.95833°N 71.64722°WCoordinates: 10°57′30″N 71°38′50″W / 10.95833°N 71.64722°W |
Region | La Guajira, Maracaibo Basin |
Country |
Colombia 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]
Fossils
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
- ↑ García González et al., 2010
- 1 2 Apón Formation (Toas Island) at Fossilworks.org
- ↑ Barrett et al., 2008, p.84
- ↑ Apón Formation (Río Negro) at Fossilworks.org
Bibliography
- Barrett, P.M.; Butler, R.J.; Edwards, N.P.; Milner, A.R. (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) (PDF). 28. Zitteliana B. pp. 1–264. Retrieved 2017-03-31.
- García González, Mario; Ricardo Mier Umaña; Luis Enrique Cruz Guevara (2010). "Reconstrucción de la historia paleotermal de la subcuenca de la Baja Guajira, Colombia". Boletín de Geología, Universidad Industrial de Santander. 32: _. Retrieved 2017-03-31.