The calcareous nannofossil biostratigraphy of three wells (DB-1, DB-2 and DB-3) drilled along an approximate SWW–NEE trend in the eastern section of the Benin (Dahomey) Basin, Nigeria, has shown significant stratigraphic gaps in the sedimentary succession. In this study, we better constrained the presence and durations of four major hiatuses that occurred between the Late Cretaceous and late Miocene. Most conspicuous was an approximately 11.62 million-year hiatus spanning the Maastrichtian (Late Cretaceous, ~72.1 Ma) and Danian (Early Paleocene, ~60.48 Ma). The other unconformities identified occurred during the Eocene/Oligocene, Late Oligocene/early Miocene and middle/late Miocene. The presence of these unconformities across large areas of the basin is an indication of low sea levels and/or tilt in regional basin tectonics during the Late Cretaceous/Early Paleogene and has implication for stratigraphic trap styles for hydrocarbon exploration.

在尼日利亚贝宁（达荷美）盆地东部沿大约SWW-NEE趋势钻探的三个井（DB-1，DB-2和DB-3）的钙质纳米化石生物地层学显示，沉积物中存在明显的地层学空白演替。在这项研究中，我们更好地限制了晚白垩世和中新世之间发生的四个主要裂隙的存在和持续时间。最显着的是跨越马斯特里赫特（晚白垩世，约72.1 Ma）和达尼安的大约1162万年的裂隙。（古新世早期，〜60.48 Ma）。确定的其他不整合面发生在始新世/渐新世，晚渐新世/早中新世和中/晚中新世。在盆地的大面积区域存在这些不整合面，这表明晚白垩世/早古近纪期间海平面低和/或区域盆地构造倾斜，并暗示了油气勘探的地层圈闭样式。