1. Al-Shaieb Z, Hanson RE, Donovan RN, Shelton JW (1980) Petrology and diagenesis of sandstone in the Post Oak Formation (Permian), southwestern Oklahoma. J Sediment Pet 50:43–50
2. Avbovbo AA (1978) Tertiary lithostratigraphyof Niger Delta. Am Assoc Pet Geol Bull 62:237–241
3. Burst JF (1969) Diagenesis of Gulf Coast clayey sediments and its possible relation to petroleum migration. AAPG Bull 53:73–93
4. Doust H, Omatsola O (1990a) Niger Delta. In: Edwards JD, Santoyiossi PA (eds) Divergent and passive margin basin, vol 48. American Association of Petroleum Geologist Memoir, Yulsa, pp 201–238
5. Doust H, Omatsola E (1990b) Niger Delta. In: Edwards JD, Santogrossi PA (eds) Diverdent/passive margin basins, AAPG Memoir, vol 48. American Association of Petroleum Geologist, Tulsa, pp 239–248