| details |
Oligocene |
|
USSR(Primorsk Kray) |
Gromova,I.S. Palynological characteristics of the coal layers of the Kainozoisk Region Rettikhovki (South Primorsk). (In: Spores and pollen of Phanerozoic deposits. L.A. Panova et al, editors) |
1984 |
| details |
Late Oligocene |
|
USSR(Kazakh SSR) |
Panova,L.A. et al. Palynostratigraphy of Paleogene deposits. (In: Practical Palynostratigraphy. L.A. Panova et al, editors) |
1990 |
| original |
Eocene |
Middle Oligocene |
USSR |
Boytsova,E.P. et al. Miospores of some ancient plants in the USSR. |
1979 |