In late Cretaceous, the Benue Trough was subjected to the Santonian tectonism that leads to the formation of the Anambra Basin. A detailed study was carried in the Awgu section of the Anambra Basin were six outcrops were visited across the basin. Lithofacies studies was carried out on the sediments and sedimentary rocks of the various formation in the Anambra Basin. Detailed field mapping exercise was also carried out with respect to logging and identification of sedimentary structures. Six (6) outcrop sections were studied and categories into six lithofacies associations based on their stacking patterns. The Anambra basin is dominated by carbonaceous shales, dark fissile shale, siltstone, heterolithic sandstones, sandstones and conglomerate in some places. The various formations within the basin provides some understanding on the variability of depositional environments and facies succession and association. In the Anambra Basin, studies of the lithofacies, lithofacies association and succession has revealed that the formations in thye basin were deposited in a marginal marine to marine setting and the sub-environments identified are tidal channels to intertidal flat, delta plain to coastal swamp, the subtidal to coastal swamp and the shoreface. The fining upward and coarsening upwards sequences of the lithofacies and their vertical successions shows that the sediments were deposition during the transgressive and regressive phase of the ancient sea.