| original |
Eocene |
Oligocene |
Colombia |
Schuler,M. et al. Palynologic observations in the Amaga Basin (Colombia). |
1970 |
| details |
Eocene |
Oligocene |
Colombia |
de Porta,J. Stratigraphic Lexicon. Colombia:(Part Two). Tertiary and Quaternary. |
1974 |
| details |
Early Oligocene |
Middle Oligocene |
China(Liaoning) |
Ke et al. Early Tertiary spores and pollen grains from the Coastal Region of Bohai |
1978 |
| details |
Middle Eocene |
Late Oligocene |
China(Hopei) |
Sung,T.C. et al. Early Tertiary spores and pollen grains from the Coastal Region of Bohai. |
1978 |
| details |
Eocene |
Oligocene |
Colombia |
Sung,T.C. et al. Early Tertiary spores and pollen grains from the Coastal Region of Bohai. |
1978 |
| details |
Oligocene |
Miocene |
Cameroon |
Salard-Cheboldaeff,M. The Maestrichtian and Tertiary palynoflora of the Coastal sedimentary Basin of Cameroon. |
1978 |
| details |
Eocene |
Oligocene |
Colombia |
Salard-Cheboldaeff,M. The Maestrichtian and Tertiary palynoflora of the Coastal sedimentary Basin of Cameroon. |
1978 |