Paleocurrent and sedimentological studies in the Benue Trough,Nigeria

Paleocurrent analysis indicates an easterly and a westerly source, respectively, for the Cretaceous and Tertiary sediments in the middle and upper Benue Trough. Petrographic differentiation of the pre-Santonian and post-Santonian sediments is based on their feldspar contents. Petrographic evidence suggests that the Tertiary sediments are polycycled; this fact, coupled with the inferred westerly source, suggests that the present limits of the trough are not the paleolimits. Thus the rift boundary faults are probably further westward and eastward of the present trough margins.