TY - JOUR AU - Yandoka, Babangida M. Sarki PY - 2021/07/06 Y2 - 2024/03/29 TI - MICROFACIES ANALYSIS OF CRETACEOUS SEDIMENTS OF DUKUL FORMATION, YOLA SUB-BASIN, NORTHERN BENUE TROUGH, NIGERIA: PALEO-ENVIRONMENTAL IMPLICATIONS JF - FUDMA JOURNAL OF SCIENCES JA - FJS VL - 5 IS - 2 SE - Research Articles DO - 10.33003/fjs-2021-0502-619 UR - https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/619 SP - 310 - 319 AB - Carbonate microfacies analysis was conducted on the exposed sediments of Dukul Formation from Yola Sub-basin of the Northern Benue Trough with an objective to reconstruct the paleodepositional environment. The study revealed four (4) major microfacies; oyster wackestone, ostracod oyster wackestone-packestone, bioclastic wackestone and bioclastic packestone microfacies. The microfacies assemblages indicate and affirm that the Dukul Formation sediments were deposited in shallow marine (mid-inner ramp) environment under suboxic to relatively anoxic conditions due to sea-level drop. This is further supported owing to the occurence of corals, brachiopods, bivalves and ostracods immediately below the mean fair-weather wave base (FWWB) ER -