| details |
Valanginian |
|
USSR(Urals) |
Bondarenko,N.M. et al. A list of plant spores and pollen of Valanginian deposits in some districts of the USSR. (In: Atlas of Lower Cretaceous spore-pollen complexes of some regions of USSR. I.M.Pokyovsksys and N.K.Stel'mak, editors) |
1964 |
| details |
Valanginian |
|
USSR(Sverdlovskaya) |
Bondarenko,N.M. et al. A list of plant spores and pollen of Valanginian deposits in some districts of the USSR. (In: Atlas of Lower Cretaceous spore-pollen complexes of some regions of USSR. I.M.Pokyovsksys and N.K.Stel'mak, editors) |
1964 |
| details |
Early Jurassic |
|
USSR(Kazakh SSR) |
Ritenberg,M.I. et al. Lower Mesozoic coal accumulation in the Territory of the Maikiubensk Basin. (In: History of Lower Mesozoic Coal Accumulation in Kazakhstan: Part 1.) |
1961 |