| 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 |
Early Devonian |
|
USSR(Bashkir ASSR) |
Chepikova,I.K. Stratigraphic position of the Upper Bavly Beds in the Volga-Ural Region. |
1971 |
| details |
Early Devonian |
|
USSR(Permsk Oblast) |
Chepikova,I.K. Stratigraphic position of the Upper Bavly Beds in the Volga-Ural Region. |
1971 |
| details |
Vendian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |