1. Anyanwu NP, Arua I (1990) Ichnofossils from the Imo Formation and their paleoenvironmental significance. J Min Geol 26(1):1–4
2. Ajetomobi J, Abiodun A, Hassan R (2011) Impacts of climate change on rice agriculture in Nigeria. Trop Subtrop Agroecosyst 14(2):613–22
3. Akande SO, Ogunmoyero IB, Petersen HI, Nytoft HP (2007) Source rock evaluation of coals from the lower Maastrichtian Mamu formation SE Nigeria. J Pet Geol 30(4):303–324
4. Akinsanola AA, Ogunjobi KO (2014) Analysis of rainfall and temperature variability over Nigeria. Glob J Human-Soc Sci: B Geography, Geosci, Environ Disaster Manage 14(3):1–7
5. Arua I (1980) Palaeocene macrofossils from the Imo Shale in Anambra state, Nigeria. J Min Geol 17(1):81–4