| details |
Early Cambrian |
|
USSR(Russian Platform) |
Volkova,N.A. Hystrichosphaeridae of the Lower Cambrian. |
1974 |
| details |
Precambriam |
|
USSR(Belorussian SSR) |
Bessonova,V.Y. et al. Organic material from the Pogranichnykh deposit, Precambrian to Cambrian of Belorussia |
1979 |
| details |
Late Vendian |
Cambrian |
USSR(Urals) |
Vidal,G. et al. Events and acritarch biostratigraphy around the Precambrian/Cambrian transition. |
1986 |
| details |
Late Riphean |
|
China(Anhwei) |
Sun,W. Discussions on the age of the Liulaobei Formation |
1987 |