| details |
Jackson |
Vicksburg |
Alabama |
Frederiksen,N.O. Stratigraphy and palynology of the Jackson Stage (Upper Eocene), and adjacent strata of Mississippi and Western Alabama. |
1967 |
| details |
Early Oligocene |
Middle Oligocene |
E.Germany |
Krutzsch,W. Eocene spore stratigraphy: Table 2. (Stratigraphic classification of spores from Upper Tertiary in North Central Europe.) |
1966 |
| details |
Oligocene |
|
Germany |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 4. Supplement to all Groups, (Turmae). |
1966 |
| details |
Middle Oligocene |
|
E.Germany(Halle) |
Lenk,G. Some stratigraphically important pollen types of the Tertiary of Middle Germany. |
1965 |
| original |
Middle Oligocene |
|
Germany |
Krutzsch,W. Stratigraphic or botanic importance of new spore and pollen forms from the German Tertiary. |
1962 |