| details |
Late Ordovician |
|
Sweden(Gotland) |
Eiserhardt,K.H. Sphaeromorphitic cysts and Phyromata from Ojlemyrflint erratics (Upper Ordovician, Gotland Sweden). Part 2. |
1991 |
| details |
Llandeilian |
Middle Ashgillian |
USSR(Estonian SSR) |
Uutela,A. et al. Ordovician acritarchs from the Rapla borehole, Estonia |
1991 |
| details |
Late Llandoverian |
Early Wenlockian |
Canada(Ontario) |
Eley,B.E. et al. Acritarchs from the fossil Hill Formation (Silurian) of Southern Ontario, Canada |
1992 |
| details |
Early Lochkovian |
|
Canada(Newfoundland) |
Burden,E.T. et al. Palynology and micropaleontology of the Clam Bank Formation (Lower Devonian) of Western Newfoundland, Canada. |
2002 |