| details |
Riphean |
|
USSR |
Naumova,S.N. Zonal assemblages of Precambrian and Lower Cambrian plant microfossils of Eurasia and their stratigraphic importance. |
1968 |
| details |
Early Proterozoic |
|
USSR(Ukrainian SSR) |
Kalyaev,G.I. et al. New data on the stratigraphic position of the Krivorozhskoi series |
1973 |
| details |
Riphean |
|
USSR(Ukrainian SSR) |
Snezhko,A.M. Discovery of the algae of the Riferites Group in the Krivoy Rog series Upper series |
1973 |
| details |
Late Precambrian |
Early Cambrian |
USSR |
Naumova,S.N. Plant microfossils of Precambrian and Lower Cambrian of Eurasia and their significance for stratigraphy. |
1974 |
| details |
Middle Ordovician |
|
USSR(Vologda) |
Timofeev,B.V. et al. Microfossils of the Precambrian, Cambrian and Ordovician. |
1976 |