Irhazer Group

Geology

Formations: unnamed (3), Irhazer II (2), Irhazer Shales (9), Tiourarén (6)

Lithologies: not reported (4), claystone (7), mudstone (3), "shale" (5), siltstone (2), sandstone (8), conglomerate (1)

Paleoenvironments: terrestrial indet. (16), wet floodplain (2), levee (1), fluvial-lacustrine indet. (1)

Age range: base of the Bajocian to the top of the Valanginian or 170.90000 to 132.60000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Middle Jurassic174.7 - 161.5Niger (Agadez) (201817)
Middle Jurassic - Late/Upper Jurassic174.7 - 143.1Niger (Agadez) (25352)
Bajocian - Bathonian170.9 - 165.3Niger (Agadez) (104815)
Late/Upper Jurassic161.5 - 143.1Niger (Agadès) (224317)
Late/Upper Jurassic161.5 - 143.1Niger (Agadez) (25354 59641 59643 91375 181364)
Berriasian - Valanginian143.1 - 132.6Niger (Agadez) (59630 59631 59632)
Early/Lower Berriasian - Late/Upper Valanginian143.1 - 132.6Niger (Agadès) (223707)
Early/Lower Berriasian - Late/Upper Valanginian143.1 - 132.6Niger (Agadez) (25193 25202 25223)
Early/Lower Berriasian - Late/Upper Valanginian143.1 - 132.6Niger (Agadèz) (25132 25133)
Early/Lower Berriasian - Late/Upper Barremian143.1 - 121.4Niger (Agadez) (25226)
Early/Lower Berriasian - Late/Upper Albian143.1 - 100.5Niger (Agadez) (25353)