Multi-proxy evidence from the exposed strata at Okpekpe, Imiegba, and environs for nomenclature as Mamu Formation, Benin Flank, NW Anambra basin, Nigeria. J. Nig. Soc. Phys. Sci. [Internet]. 2026 Feb. 28 [cited 2026 Mar. 4];8(1):2604. Available from: https://journal.nsps.org.ng/index.php/jnsps/article/view/2604