Apón Formation
Apón Formation Stratigraphic range: Early Cretaceous (Late Aptian) | |
---|---|
Type | Geological formation |
Sub-units | Machiques Member |
Underlies | |
Overlies | |
Lithology | |
Primary | Limestone, marl |
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 |
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 |
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: , , , , Ostrea sp., , Requienia sp., , , Quinqueloculina sp., Triloculina sp.,[2] and Panopea (Myopsis) plicata in Río Negro.[4]
See also[]
References[]
- ^ García González et al., 2010
- ^ a b Apón Formation (Toas Island) at Fossilworks.org
- ^ Barrett et al., 2008, p.84
- ^ Apón Formation (Río Negro) at Fossilworks.org
Bibliography[]
- 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; B. Accessed 2017-03-31. ; ; , and . 2008.
- Reconstrucción de la historia paleotermal de la subcuenca de la Baja Guajira, Colombia. Boletín de Geología 32. . Accessed 2017-03-31. ; , and . 2010.
Categories:
- 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