Irhazer Shale
Irhazer II Formation
Stratigraphic range: Bathonian,[1]
~167 Ma
↓
 Middle Jurassic
TypeGeological formation
Unit ofIrhazer Group
UnderliesTiouraren Formation
OverliesAssaouas Formation
Lithology
PrimaryShale, claystone
OtherSiltstone, sandstone
Location
Coordinates16°42′N 7°54′E / 16.7°N 7.9°E / 16.7; 7.9
Approximate paleocoordinates8°18′N 2°36′E / 8.3°N 2.6°E / 8.3; 2.6
RegionAgadez Region
Country Niger
ExtentIullemmeden Basin
Type section
Named forIrhazer Izane
Irhazer Shale is located in Niger
Irhazer Shale
Irhazer Shale (Niger)

The Irhazer Shale (French: Argiles de l'Irhazer) or Irhazer II Formation is a Middle Jurassic geologic formation of the Irhazer Group in the Agadez Region of Niger. Fossil ornithopod tracks have been reported from the formation.[2] The dinosaur Spinophorosaurus is known from the formation.[3]

Description

As the overlying Tiouraren Formation of the Irhazer Group, the formation previously had been assigned an Early Cretaceous age.[3][4][5]

Fossil content

The following fossils were reported from the formation:[3][4][5]

See also

References

  1. ^ Remes, K.; Ortega, F.; Fierro, I.; Ferrer, J.M.M.; Joger, U.; Kosma, R.; Ide, Oumarou Amadou; Maga, Abdoulaye; Ide, O. A.; Maga, A (2009). Farke, Andrew Allen (ed.). "A new basal sauropod dinosaur from the Middle Jurassic of Niger and the early evolution of sauropoda". PLOS ONE. 4 (9): e6924. Bibcode:2009PLoSO...4.6924R. doi:10.1371/journal.pone.0006924. PMC 2737122. PMID 19756139.
  2. ^ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
  3. ^ a b c North of Aderbissinat at Fossilworks.org
  4. ^ a b Ifayen Ignère at Fossilworks.org
  5. ^ a b In Gall at Fossilworks.org
  6. ^ Serrano-Martínez, Alejandro; Vidal, Daniel; Sciscio, Lara; Ortega, Francisco; Knoll, Fabien (2015). "Isolated theropod teeth from the Middle Jurassic of Niger and the early dental evolution of Spinosauridae". Acta Palaeontologica Polonica. doi:10.4202/app.00101.2014. hdl:10261/152148.
  7. ^ Hendrickx, Christophe; Mateus, Octávio; Araújo, Ricardo; Choiniere, Jonah (2019). "The distribution of dental features in non-avian theropod dinosaurs: Taxonomic potential, degree of homoplasy, and major evolutionary trends". Palaeontologia Electronica. doi:10.26879/820. hdl:10362/98436. ISSN 1935-3952.

Bibliography

Further reading

Categories