| details |
Tremadocian |
Ludlovian |
USSR(Russian Platform) |
Umnova,N.I. Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform. |
1974 |
| details |
Tremadocian |
Ludlovian |
USSR(Pre-Baltic) |
Umnova,N.I. Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform. |
1974 |
| details |
Early Ordovician |
Middle Ordovician |
USSR(Russian Platform) |
Umnova,N.I. Ordovician and Silurian acritarchs of the Moscow Basin and Prebaltic |
1975 |
| details |
Middle Cambrian |
|
USSR(Pre-Baltic) |
Umnova,N.I. Ordovician and Silurian acritarchs of the Moscow Basin and Prebaltic |
1975 |
| details |
Middle Llandoverian |
|
USSR(Orenburg) |
Talnov,E.S et al. Lower Silurian sediments of the Allochthonous complex in the Southern Part of the East Urals Meganticlinorium |
1987 |
| details |
Late Ordovician |
|
USSR(Lithuanian SSR) |
Pa?keviciene,L. Acritarchs from the Upper Ordovician of East Lithuania |
1993 |
| details |
Nabala |
|
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 |