The Benue Trough is a major geological structure underlying a large part of Nigeria and extending about 1,000 km northeast from the Bight of Benin to Lake Chad. It is part of the broader West and Central African Rift System.

What is middle Benue Trough?

Middle Benue Trough is a moderate to deep, fault bounded rift basin with thick (~ 6304 m) Cretaceous sediments. • · Seven deep (> ~2500 m) sub-basins and several elongated shallow (< ~1800 m) basement ridges are present.

What is lower Benue Trough?

The Lower Benue Trough is the southern portion of the Benue Trough that is believed to have originated as a failed arm of an aulacogen at the time of the opening of the South Atlantic Oceans during the separation of the African plate and the South American plate.