The Apón Formation is a geological

formation Formation may refer to: Linguistics * Back-formation, the process of creating a new lexeme by removing or affixes * Word formation, the creation of a new word by adding affixes Mathematics and science * Cave formation or speleothem, a secondary ...

in northwestern Venezuela ( Maracaibo Basin) and northern

Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coast—as well as in the Pacific Ocean. The Colombian mainland is bordered by the Car ...

( La Guajira),García González et al., 2010 whose thick-bedded limestone interbedded with subordinate amounts of dark gray calcareous shale and sandy shale strata date back to the

Early Cretaceous The Early Cretaceous ( geochronological name) or the Lower Cretaceous (chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 145 Ma to 100.5 Ma. Geology Pro ...

( Late Aptian epoch). Pterosaur remains of Ornithocheiridae indet. (= ?Anhangueridae indet.) are among the fossils that have been recovered from the formation.Barrett et al., 2008, p.84

Fossil content

The following fossils, among others, have been found in the Apón Formation at Toas island: '' Spiroculina sp.'', ''

Orbitolina concava ''Orbitolina'' is an extinct genus of foraminifera belonging to the order Textulariida and family Orbitolinidae. Fossils of this genus are widely found in beds deposited in the Tethys Ocean ranging from Aptian (early Cretaceous)) to Cenomanian ...

'', '' Gryphaeostrea'', '' Amphidonte (Ceratostreon) boussingaulti'', '' Ostrea sp.'', '' Amphitriscoelus waringi'', '' Requienia sp.'', '' Parahoplites sp.'', '' Cheloniceras sp.'', '' Quinqueloculina sp.'', '' Triloculina sp.'',Apón Formation (Toas Island)
at

Fossilworks Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals ...

.org and '' Panopea (Myopsis) plicata'' in Río Negro.Apón Formation (Río Negro)
at

.org

References

Bibliography

* * {{DEFAULTSORT:Apon Formation Geologic formations of Colombia Geologic formations of Venezuela Lower Cretaceous Series of South America Cretaceous Colombia Cretaceous Venezuela Limestone formations Marl formations Shallow marine deposits Aptian Stage Fossiliferous stratigraphic units of South America Paleontology in Venezuela Geography of La Guajira Department Geography of Zulia Maracaibo basin Colombia–Venezuela border

Fossil content

See also

References

Bibliography