Irhazer Shale

Irhazer Shale
Irhazer II Formation
Stratigraphic range: Middle Jurassic
~170 Ma Middle Jurassic
Paleoenvironment reconstruction
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
CountryNiger
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. The dinosaur Spinophorosaurus is known from the formation.

Description

As the overlying Tiouraren Formation of the Irhazer Group, the formation previously had been assigned an Early Cretaceous age.

Fossil content

The following fossils were reported from the formation:

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. 1 2 3 North of Aderbissinat at Fossilworks.org
  4. 1 2 Ifayen Ignère at Fossilworks.org
  5. 1 2 In Gall at Fossilworks.org
  6. ↑ Páramo, A.; Escaso, F.; Aberasturi, A.; Ortega, F. (2013). "A new theropod braincase from the Middle Jurassic of Azenak (Agadez, Niger)". VI International Symposium About Dinosaurs Palaeontology and Their Environment.
  7. ↑ Mudroch, Alexander; Richter, Ute; Joger, Ulrich; Kosma, Ralf; Idé, Oumarou; Maga, Abdoulaye (2011-02-14). "Didactyl Tracks of Paravian Theropods (Maniraptora) from the ?Middle Jurassic of Africa". PLOS ONE. 6 (2) e14642. doi:10.1371/journal.pone.0014642. ISSN 1932-6203. PMC 3038851. PMID 21339816.
  8. ↑ 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.
  9. ↑ 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

  • Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2.

Further reading