| original |
Late Givetian |
|
USSR(Bashkir ASSR) |
Chibrikova,E.V. Spores from Devonian and older deposits of Bashkir |
1959 |
| details |
Late Givetian |
|
USSR(Nenets Nat.Okrug) |
Andreeva,E.M. et al. A paleobotanical characterization of the Givetian Beds of northern Timan |
1967 |
| details |
Givetian |
Frasnian |
USSR(Nenets Nat.Okrug) |
Voitovich,I.A. Spore assemblages of Givetian-Frasnian boundary strata of the Timan-Pechora Province and their facies relationship. |
1972 |
| details |
Frasnian |
|
USSR(Kaliningrad) |
Yalysheva,A.A. Palynostratigraphy of Devonian deposits. (In: Practical Palynostratigraphy. L.A. Panova et al, editors) |
1990 |