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Savanna Journal of Basic and Applied Sciences 2(1):29-34
Clastic-carbonate Facies, Clay Mineralogy and Depositional Setting of Sekuliye Formation Sediments, Yola Sub-basin, Northern Benue Trough, Nigeria
Sarki Yandoka B. M. and Kwaya M. Y

ABSTRACT
Sedimentary facies (clastic lithofacies and carbonate microfacies) and clay mineralogy (clay mineral facies) studies were conducted on Sekuliye Formation sediments from Yola Sub-basin with aim of re-interpreting the paleodepositional setting. Based on this study, three (3) lithofacies and three (3) microfacies were recognised. Lithofacies and microfacies therefore, suggests deposition in coastal-shallow marine/shelf (ramp) environment underlow-energy condition. Body fossils such as bivalves, crinoids, brachiopods and bryozoans dominates the sediments which indicate shelf or ramp depositional setting. Kaolinite, montmorillonite, glauconite and illite are the major clay minerals which indicates deposition in continental shelfor open marine shore settings.