original |
Early Oligocene |
|
USSR(Urals) |
Agranovskaya,I.A. et al. Short description of spores and pollen from Lower Oligocene deposits of the northern and Central Urals |
1956 |
original |
Late Eocene |
Middle Oligocene |
USSR(WSL) |
Boytsova,E.P. Fossil pollen of the Quercus species and its importance for the subdivision of the Paleogene deposits of the of the Western Siberian Lowland and western Kazakhstan. (In: On the Methods in Paleopalynological Studies.) |
1966 |
original |
Late Eocene |
Middle Oligocene |
USSR(Kazakh SSR) |
Boytsova,E.P. Fossil pollen of the Quercus species and its importance for the subdivision of the Paleogene deposits of the of the Western Siberian Lowland and western Kazakhstan. (In: On the Methods in Paleopalynological Studies.) |
1966 |