Apón Formation

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)
TypeGeological formation
Sub-unitsMachiques Member
UnderliesAguardiente Formation
OverliesRío Negro Formation
Lithology
PrimaryLimestone, marl
OtherCalcareous and sandy shales
Location
Coordinates10°57′30″N 71°38′50″W
Approximate paleocoordinates7.7°N 41.1°W / 7.7; -41.1
RegionLa Guajira, Maracaibo Basin
Country Colombia
 Venezuela
Type section
Named forApón River
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]

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See also

References
  1. García González et al., 2010
  2. Apón Formation (Toas Island) at Fossilworks.org
  3. Barrett et al., 2008, p.84
  4. Apón Formation (Río Negro) at Fossilworks.org

Bibliography
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