NOTE: Some areas where sedimentary rocks could be found are:
1. Northern zone = Benue (Gboko), Ankpa, Niger, Kwara, Sokoto, Bauchi, Gongola, Abuja etc.
2. South – South = Edo, Delta, Rivers, Cross Rivers
3. South – East = Anambra, Imo, Enugu. etc.
4. Western Zone = Oyo, Ogun, Ondo etc.