Irhazer Shale

The Irhazer Shale (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:
 * Elaphrosaurus iguidiensis
 * Ornithopoda indet.
 * Spinosauridae or Megalosauridae indet.
 * Spinophorosaurus nigerensis