| original |
Vendian |
|
USSR(Urals) |
Chepikova,I.K. Acritarchae of Wendean deposits of Volga-Ural oil and Gas Region and their significance for stratigraphy. (In: Sporen and pollen in deposits of oils and Gas-bearing Regions of the USSR.) |
1971 |
| details |
Late Riphean |
|
USSR(Urals) |
Kiryanov,V.V. et al. New data on the geological structure of Riphean deposits of the Pre-Urals. |
1975 |
| details |
Vendian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |