Gossans in tropical areas 

2 Ferruginous rocks of Pagala (Togo) and Tin Akoff (Burkina Faso)

 

 

Fig 12  

Schematic location map of Pagala (Togo) and Tin Akoff (Burkina Faso) in the West-African great geological structures (modified after Roussel and Lesquer, 1981)