| details |
Ashgillian |
Llandoverian |
Scotland(Dumfries) |
Whelan,G.M. Acritarch and chitinozoan distribution across the type Ordovician-Silurian boundary at Dobb's Linn, Scotland |
1986 |
| details |
Arenigian |
Llanvirnian |
Morocco |
Elaouad-Debbaj,Z. Arenigian - Llanvirnian acritarchs and chitinozoans from the Anti-Atlas, (Morocco). |
1984 |
| details |
Arenigian |
Ashgillian |
USA(Western) |
Hutter,T.J. Ordovician chitinozoan zones from the Western United States |
1986 |
| details |
Arenigian |
Llanvirnian |
Brazil(Amazonas) |
de Quadros,L.P. Occurence of Ordovician microfossils (Acritarchae) in the Alto Amazon Sub Basin, Brazil. |
1986 |
| details |
Aptian |
Early Albian |
Egypt |
Schrank,E. Cretaceous pollen and spores from the "Nubian Sandstone" of Dakhla-Beckens (Egypt). |
1982 |
| details |
|
|
France(Mayenne) |
Le H©riss©,A. Lower Devonian spores of the Laval Synclinorium (Massif Armoricain) |
1983 |
| details |
|
|
Czechoslovakia |
KonzalovЎ,M. Some results of micropaleontological research in the East Sudetic sequence |
1978 |