分数下地区的沉积区几乎占据了尼日利亚土地区域的一半,在该地区,沉积盆地形成部分(板I和V)。盆地包括:贝努埃盆地(Benue Basin)分为三(3)上下贝努埃(Benue),阿达伐(Adamawa)(或冈戈拉)盆地,尤拉盆地(Yola Basin),东部有阿南布拉盆地,贝达盆地,西北部有索科托盆地和尼日尔·德尔塔基金。西北部的索科托盆地和东北的远乍得盆地是Iulemeden和Taodeni盆地的一部分,它们在尼日利亚以外,历史可以追溯到古生代(Whiteman,1982)。The oldest sedimentary rocks dated at the surface in Nigeria (excluding the basement complexes) are early Cretaceous (Albian) in age and the youngest sediments are the present day Niger-Delta complex deposits which are being laid down at the present by the Benue and Niger distributaries in the coastal areas of south Nigeria (Okonkwo, 1995) Sedimentary rocks and sediments are found in six major basins which占地约462,000平方公里(或约191,000英里),几乎是地下室占据或覆盖的面积的50%。
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