| details |
Precambriam |
|
USSR(Yakut ASSR) |
Zhuravleva,Z.A. et al. Structure and age of deposits belonging to the Tolba Formation (southeastern Yakutiya). |
1961 |
| original |
Rhaetian |
|
USSR(Ukrainian SSR) |
Semenova,E.V. Spore and pollen assemblages of deposits of the Jurassic and Triassic Boundary of the Don Basin. |
1970 |
| details |
Late Triassic |
|
USSR(Ukrainian SSR) |
Semenova,E.V. Correlation between Upper Triassic strata of the Donets Basin and other European Regions based on miospores. |
1971 |
| details |
Late Triassic |
|
USSR(Ukrainian SSR) |
Boersma,M. et al. Triassic palynomorphs, index to genera and species |
1987 |