Earth:Irhazer Shale
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| Irhazer Shale Irhazer II Formation Stratigraphic range: Bathonian,[1] ~167 Ma Middle Jurassic | |
|---|---|
| Type | Geological formation |
| Unit of | Irhazer Group |
| Underlies | Tiouraren Formation |
| Overlies | Assaouas Formation |
| Lithology | |
| Primary | Shale, claystone |
| Other | Siltstone, sandstone |
| Location | |
| Coordinates | [ ⚑ ] : 16°42′N 7°54′E / 16.7°N 7.9°E |
| Paleocoordinates | [ ⚑ ] 8°18′N 2°36′E / 8.3°N 2.6°E |
| Region | Agadez Region |
| Country |  Niger |
| Extent | Iullemmeden Basin |
| Type section | |
| Named for | Irhazer Izane |
  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]
- Elaphrosaurus iguidiensis
- Ornithopoda indet.
- Spinosauridae or Megalosauridae indet.[6][7]
- Spinophorosaurus nigerensis
See also
- List of dinosaur-bearing rock formations
- List of stratigraphic units with ornithischian tracks
- Ornithopod tracks
- List of stratigraphic units with ornithischian tracks
- Lists of fossiliferous stratigraphic units in Africa
- List of fossiliferous stratigraphic units in Niger
- Geology of Niger
References
- ↑ Remes, K.; Ortega, F.; Fierro, I.; Ferrer, J.M.M.; Joger, U.; Kosma, R.; Ide, Oumarou Amadou; Maga, Abdoulaye et al. (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. doi:10.1371/journal.pone.0006924. PMID 19756139. Bibcode: 2009PLoSO...4.6924R.
- ↑ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
- ↑ 3.0 3.1 3.2 North of Aderbissinat at Fossilworks.org
- ↑ 4.0 4.1 Ifayen Ignère at Fossilworks.org
- ↑ 5.0 5.1 In Gall at Fossilworks.org
- ↑ 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. http://www.app.pan.pl/article/item/app001012014.html.
- ↑ 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. 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
- A. F. d. Lapparent. (1960). Les Dinosauriens du "Continental intercalaire" du Saharal central [The dinosaurs of the "Continental Intercalaire" of the central Sahara]. Mémoires de la Société géologique de France, nouvelle série 39(88A):1-57
- K. Remes, F. Ortega, I. Fierro, U. Joger, R. Kosma, J. M. M. Ferrer, Project, Niger Project, O. A. Ide and A. Maga. (2009). A new basal sauropod dinosaur from the Middle Jurassic of Niger and the early evolution of Sauropoda. PLoS One 4(9):e6924:1-13
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