| details |
Tremadocian |
|
England |
Downie,C. Observations on the nature of the acritarchs |
1973 |
| details |
Paleozoic |
|
France(Cotes du Nord) |
Lefort,J.P. et al. A study of the Pre-Mesozoic basement samples of the northern part of the Channel Islands Gulf. |
1974 |
| details |
Late Llandoverian |
Early Wenlockian |
Argentina |
Bultynck,P. et al. Lower Ordovician conodonts and acritarchs and Lower Silurian acritarchs of the northern part of the Argentinian Cordillera. |
1982 |
| details |
Nd |
|
China(E.China) |
Wang,K. et al. Palynological assemblages of crude oil from the oil fields in East China and the research of the oil source. |
1986 |
| details |
Late Cambrian |
|
USSR(Estonian SSR) |
Mens,K.A. et al. Upper Cambrian biostratigraphy of Estonia. |
1993 |