| details |
Late Cambrian |
|
Belgium |
Martin,F. Cambrian-Ordovician acritarchs of the Massif du Brabant, Belgium. |
1975 |
| details |
Tremadocian |
|
Algeria |
Baudelot,S. et al. Discovery of the Lower Ordovician, dated by acritarchs, on the East of the Petite Kabylie (Algeria); Structural consequences. |
1981 |
| details |
Early Ordovician |
|
Finland |
Tynni,R. On Paleozoic microfossils in clastic dykes on the …land Islands and in the core samples of Lumparn. (In: Paleozoic sediments in the Rapakivi area of the …land Islands. L. Bergman, R. Tynni and B. Winterhalter, editors.) |
1982 |
| details |
Middle Cambrian |
Early Ordovician |
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Early Tremadocian |
|
Italy(Sardinia) |
Di Milia,A. et al. Tremadocian acritarch assemblages from the Solanas Sandstone Formation (Nappe zone of Central Sardinia) |
1993 |