Abeokuta Gr

References: Reyment, 1965; Adeleye, 1975; Kogbe,1976; Dessauvagie, 1975; Petters, 1978; Offodile, 1980; Whiteman, 1982; Benkhelil, 1989; Okosun, 1992; Guiraud, 1993; Akande et al., 1998; Zaborski et al., 1998; Jauro et al., 2007; Obaje, 2009; Nwajide, 2013

Araromi Fm: The formation consists of fine to medium sands at the base, overlain by seaward thickening shale (the Agbabu Shale), siltstone with thin limestones and marls. There are also thin bands of lignite and the shales are light grey to black and are highly carbonaceous (Nwajide, 2013). Synonym-Araromi Shale (Reynment,1965). Maastrichtian – Early Paleocene (Nwajide, 2013)

Afowo Fm: The beds are composed of mostly medium to coarse sandstone, with thin to thick interbeds of shales, siltstones and claystones. There is a shoaling upward trend and has two bitumen-soaked, fine-grained sand horizons (Nwajide, 2013). Turonian – Maastrichtian (Nwajide, 2013).

Ise Fm: It is a pre-drift succession of conglomerates, sands, and mudrocks overlying the Basement Complex and continues upwards with medium to coarse, loose sand interbedded with kaolinitic clays (Nwajide, 2013). It is about 1,862m thick in the Ise-2 well (Omatsola and Adegoke, 1981). Berriasian – Hauterivian (Nwajide, 2013, after Hessouhet al., 1994).