Apón Formation
Geological formation in the northwestern Venezuela and northern Colombia
From Wikipedia, the free encyclopedia
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]
| Apón Formation | |
|---|---|
| Stratigraphic range: Early Cretaceous (Late Aptian) | |
| Type | Geological formation |
| Sub-units | Machiques Member |
| Underlies | Aguardiente Formation |
| Overlies | Río Negro Formation |
| Lithology | |
| Primary | Limestone, marl |
| Other | Calcareous and sandy shales |
| Location | |
| Coordinates | 10°57′30″N 71°38′50″W |
| Approximate paleocoordinates | 7.7°N 41.1°W |
| Region | La Guajira, Maracaibo Basin |
| Country | Colombia, Venezuela |
| Type section | |
| Named for | Apón River |
.svg)  Apón Formation (Venezuela) | |
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]