Palynological study of some Afowo bituminous sediments in parts of Southwestern Nigeria
1 Department of Geology, Ekiti State University, Ado-Ekiti, Nigeria.
2 Geosciences Department, University of Lagos, Nigeria.
Research Article
World Journal of Advanced Research and Reviews, 2024, 22(02), 2163–2173
Publication history:
Received on 22 April 2024 revised on 29 May 2024; accepted on 31 May 2024
Abstract:
The tar sand and shale sequences of the Afowo Formation exposed at Lore, Shagbon, and Gbegude areas in parts of southwestern Nigeria has been palynologically investigated to unravel the depositional history. The lithofacies assemblage of the studied section comprising of shale, siltstone, claystone, lignites and ferruginised facies and their peculiar sedimentological features indicate low energy quiet setting, ranging from fresh water to nearshore marine swamps. Recovered palynomorph assemblage include marine dinoflagellate cyst such as Paleocystodinium golzowenses, Lycopodium spp. of Maastrichtian age. The pollen and spore (Retidiporites magdalenensis, Echimonocolpites, Echitriporites trianguliformis and C-cristatus) indicate terrestrial fresh water environment. The abundance of palmea pollen (Echitriporites and Longapertites) and the pteridophyte suggest that the vegetation developed under a predominant humid climate.
Keywords:
Bituminous; Palynomorphs; Foraminifers; Ostracods
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