Abstract:The stratigraphic relationship of the three terminal Cretaceous formations in the Upper Benue Basin (Northeastern Nigeria) has hitherto remained unclear. The sequence: Sukuliye (Sekule) Shale (oldest), overlain by Numanha Shale and then Lamja Sandstone (youngest) erected by pioneers, has been accepted by some later workers and modified or rejected by others. Employing paleontological and sedimentological evidence, the fo rmations are shown here to be, in part, laterally equivalent. Zusammenfassun g. Die strati… Show more
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