A reappraisal of salviniaceous fossils and its implication on the age and depositional environment of Nkporo Shale of Calabar Flank, Nigeria
DOI:
https://doi.org/10.54991/jop.1993.1148Keywords:
Ancient Salviniaceae, Pteridophytes, Nkporo Shale, Late Cretaceous, Calabar Flank (Nigeria)Abstract
Integrated floral and faunal (foraminiferal) data permit a precise interpretation of the age and depositional environment of the outcrop section exposed along the Calabar-Itu at 42.5 km point. The outcrop section belongs to the Nkporo Shale of the Calabar Flank from which Ariadnaesporiles nigeriensis Obebode & Skarby was reported and described. The results obtained indicate an Early Maastrichtian age and deposition in a brackish swamp environment. the biostratigraphic and environmental significance of Salviniaceous fossils have been consequently assessed.