Ara RockW
Ara Rock
Aso RockW
Aso Rock
Biu PlateauW
Biu Plateau
Chad BasinW
Chad Basin
Ferronigerite-2N1SW
Ferronigerite-2N1S
Iullemmeden BasinW
Iullemmeden Basin
Mambilla PlateauW
Mambilla Plateau
Niger Delta Basin (geology)W
Niger Delta Basin (geology)