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 |
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]
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]
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 |
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]
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]