| original |
Early Ordovician |
|
USSR(Leningrad) |
Vanderflit,Y.K. et al. A new microfossil genus from the Upper Cambrian - Lower Ordovician of the northwest and North Russian Platform. |
1992 |
| details |
Late Cambrian |
Early Ordovician |
USSR(Estonian SSR) |
Vanderflit,Y.K. et al. A new microfossil genus from the Upper Cambrian - Lower Ordovician of the northwest and North Russian Platform. |
1992 |
| details |
Early Ordovician |
|
USSR(Arkhangelsk Oblast) |
Vanderflit,Y.K. et al. A new microfossil genus from the Upper Cambrian - Lower Ordovician of the northwest and North Russian Platform. |
1992 |
| details |
Late Cambrian |
Tremadocian |
USSR(Estonian SSR) |
Volkova,N.A. Phytoplankton and acritarch research of Cambrian-Ordovician deposits of the Baltic Region |
1995 |
| details |
Early Tremadocian |
|
USSR(Arkhangelsk Oblast) |
Volkova,N.A. Phytoplankton and acritarch research of Cambrian-Ordovician deposits of the Baltic Region |
1995 |
| details |
Early Tremadocian |
|
USSR(Leningrad) |
Volkova,N.A. Phytoplankton and acritarch research of Cambrian-Ordovician deposits of the Baltic Region |
1995 |
| details |
Pakerot |
|
Lithuania |
Pa?keviciene,L. et al. The composition, distribution and evolution of Ordovician brachiopods, conodonts and acritarchs in the South-eastern part of the Baltic basin. |
2001 |