Apón Formation
| 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 / 10.95833°N 71.64722°W |
| Approximate paleocoordinates | 7°42′N 41°06′W / 7.7°N 41.1°W |
| Region | La Guajira, Maracaibo Basin |
| Country | Colombia, Venezuela |
| Type section | |
| Named for | Apón River |
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The Apón Formation is a geological formation in northwestern Venezuela (Maracaibo Basin) and northern Colombia (La Guajira), 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). Pterosaur remains of Ornithocheiridae indet. (=?Anhangueridae indet.) are among the fossils that have been recovered from the formation.