Irhazer Shale

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] ~170 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓ 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 / 16.7; 7.9
Approximate paleocoordinates	8.3°N 2.6°E / 8.3; 2.6
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

See also

• Geology portal
• Paleontology portal
• Dinosaurs portal

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with ornithischian tracks
    • Ornithopod tracks
• Lists of fossiliferous stratigraphic units in Africa
  • List of fossiliferous stratigraphic units in Niger
• Geology of Niger