| details |
Late Eocene |
|
Egypt |
Kedves,M. The presence of important sporomorph types in Egyptian Pre-Quaternary sediments |
1971 |
| details |
Ypresian |
|
Virginia |
Frederiksen,N.O. Paleogene sporomorph biostratigraphy, Northeastern Virginia. |
1979 |
| details |
Thanetian |
Ypresian |
Virginia |
Frederiksen,N.O. Rates of floral turnover and diversity change in the fossil record. |
1991 |
| details |
Late Oligocene |
Middle Miocene |
Delaware |
Groot,J.J. Plant microfossils of the Calvert Formation of Delaware. |
1992 |
| details |
Early Ypresian |
|
E.Germany(Magdeburg) |
Blumenstengel,H. et al. Stratigraphy and facies of the Lignite-bearing Tertiary in the Egeln Synclines |
1994 |