Irhazer Shale
| Irhazer Shale Irhazer II Formation | |
|---|---|
| Stratigraphic range: 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 |
| Approximate 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.[1] The dinosaur Spinophorosaurus is known from the formation.[2]
Description
As the overlying Tiouarèn Formation of the Irhazer Group, the formation previously had been assigned an Early Cretaceous age.[2][3][4]
Fossil content
The following fossils were reported from the formation:[2][3][4]
- Elaphrosaurus iguidiensis
- Sauropoda .indet (originally known as the obsolete species Rebbachisaurus tamesnensis)
- Spinophorosaurus nigerensis
- Theropoda .indet (once referred to Inosaurus tedreftensis)
See also
- List of dinosaur-bearing rock formations
- Lists of fossiliferous stratigraphic units in Africa
- Geology of Niger
References
- ^ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
- ^ a b c North of Aderbissinat at Fossilworks.org
- ^ a b Ifayen Ignère at Fossilworks.org
- ^ a b In Gall at Fossilworks.org
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