| details |
Tremadocian |
|
Belgium |
Vanguestaine,M. Zone species of acritarchs from the Cambro-Tremadocian of Belgium and the French Ardennes. |
1974 |
| details |
Tremadocian |
|
France(Ardennes) |
Vanguestaine,M. Zone species of acritarchs from the Cambro-Tremadocian of Belgium and the French Ardennes. |
1974 |
| details |
Early Paleozoic |
|
Nd |
Cramer,F.H. et al. Lower Paleozoic acritarchs. |
1979 |
| details |
Late Tremadocian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |