Usman, Halima OsuObaje, N.G.Nghargbu, K.2023-12-142023-12-142015-11-01Usman, H.O. et. al. (2015). LITTIO-STRATIGRAPHY AND PETROLEUM SOURCE ROCK POTENTIAL OF THE SOUTHERN BIDA BASIN, NIGERIAhttps://keffi.nsuk.edu.ng/handle/20.500.14448/5638The study area is the Southern Bida Basin (Lokoja Sub-basin), extending from Gada-Biyu in the Federal Capital Territory to the Agbaja Plateau in Kogi State of Nigeria. This area is geologically underlain by three rock units namely: the Lokoja, Patti and Agbaja Formations. The Lokoja formation composes of tine to medium coarse grained sandstone, poorly sorted associated with sedimentary structural features ranging from parallel lamination to cross bedding (herring bone structures) indicating continental environment of deposition with marine tidal influxes. Suspension settling in a low energy setting was attributed to the deposition of the Patti Formation with a lithologic composition of shales and siltstones which are rhythmically interbedded with concrctional to massive bioturbated ironstones. The Agbaja Formation composes of oolitic ironstones beds. The micropaleontological studies of the rocks in this area show that (he foraminiferal assemblages in Patti Formation are lowly diversified and dominated by four (4) genera, namely: Animbaculites, Milliammina, Trochamina and Textularia. This agglutinated benthonic foraminiferal assemblage indicates deposition of the Patti Formation in an anoxic shallow marine environment.enSandstone, foraminifera, biotubation, cross-bedding, oolitic, shales, siltstones, biostratigraphy.Article