| original |
Cenomanian |
|
USSR(Urals) |
Bolkhovitina,N.A. Spore and pollen characteristics of Cretaceous layers in the Central Regions of the USSR. |
1953 |
| details |
Early Paleogene |
Danian |
USSR(WSL) |
Chlonova,A.F. Isolation of guide species for the determination of age of sediments by spore-pollen analysis. |
1957 |
| details |
Late Cretaceous |
Paleocene |
USSR(Belorussian SSR) |
Menner,V.V. The spore-pollen analysis method of direct correlation of strata of diverse facies. Chapter 2: Biostratigraphic principles of correlation of marine, lagoon and continental formations. |
1962 |