| details |
Late Cambrian |
Ordovician |
USSR(Yablonov Khrebet) |
Kozerenko,V.N. et al. New data on the Lower Paleozoic deposits of East Transbaikal |
1960 |
| details |
Early Cambrian |
Middle Cambrian |
Romania |
Oniceanu,M. et al. The palynological contributions of the study of the crystallophylliens and sedimentary formation of zone between Bistricioara-Valea Seaca-Baraseu Valley (Harghita Country, East Carpathians). |
1977 |
| details |
Cambrian |
|
USSR |
Naumova,S.N. Plant microfossils of Precambrian and Lower Cambrian of Eurasia and their significance for stratigraphy. |
1974 |