| details |
Middle Eocene |
Oligocene |
Benin |
Oyede,M. et al. Dating of the so called "Oligocene" Unconformity in the onshore part of the coastal sedimentary Basin of Benin (West Africa). |
1992 |
| details |
Claiborne |
|
USA(Gulf Coast) |
Frederiksen,N.O. Sporomorph biostratigraphy, floral changes, and paleoclimatology, Eocene and Earliest Oligocene of the eastern Gulf Coast. |
1988 |
| details |
Middle Eocene |
|
Guinea |
Pokryshkin,V.I. et al. Geological factors controlling the distribution of Phosphorites in Western Africa |
1974 |
| details |
Late Eocene |
|
Nigeria |
Jan du ChЄne,R.E. et al. Some new Eocene pollen of the Ogwashi-Asaba Formation, southeastern Nigeria. |
1978 |