| details |
Late Arenigian |
Llanvirnian |
USSR(Estonian SSR) |
Uutela,A. et al. Ordovician acritarchs from the Rapla borehole, Estonia |
1991 |
| original |
Late Llanvirnian |
|
USSR(Estonian SSR) |
Uutela,A. et al. Ordovician acritarchs from the Rapla borehole, Estonia |
1991 |
| details |
Lasnamagi |
Uhaku |
Lithuania |
Pa?keviciene,L. Acritarchs of the Lasnam¤gi and Uhaku Regional Stages in the South-eastern Baltic region. |
2002 |
| details |
Middle Ordovician |
|
Estonia |
Uutela,A. Extent of the Northern Baltic Sea during the Early Palaeozoic Era: New Evidence from Ostrobothnia, western Finland. |
1998 |