Irhazer Shale
Geologic formation in Niger
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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]
| Irhazer Shale Irhazer II Formation | |
|---|---|
| Stratigraphic range: Middle Jurassic[1] ~ Middle Jurassic | |
Paleoenvironment reconstruction | |
| Type | Geological formation |
| Unit of | Irhazer Group |
| Underlies | Tiouraren Formation |
| Overlies | Assaouas Formation |
| Lithology | |
| Primary | Shale, claystone |
| Other | Siltstone, sandstone |
| Location | |
| Coordinates | 16.7°N 7.9°E |
| Approximate paleocoordinates | 8.3°N 2.6°E |
| Region | Agadez Region |
| Country | Niger |
| Extent | Iullemmeden Basin |
| Type section | |
| Named for | Irhazer Izane |
  Irhazer Shale (Niger) | |
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]
- Allosauridae indet.[6]
- Elaphrosaurus iguidiensis
- Ornithopoda indet.
- Paravipus didactyloides[7]
- Spinosauridae or Megalosauridae indet.[8][9]
- Spinophorosaurus nigerensis
