| details |
Late Givetian |
|
USSR(Saratov) |
Slobodkina,T.S. Spore assemblage from Upper Givetian deposits of the Saratov Volga Region. (In: Problems of Geology of the Southern Urals and Volga Region) |
1969 |
| details |
Middle Devonian |
|
USSR(Komi ASSR) |
Kalyuzhnyy,V.A. et al. New data on the lithologic and mineral composition and sequence of the Middle Devonian deposits in the Ukhta District, South Iman |
1962 |
| details |
Wenlockian |
|
England(Shropshire) |
Downie,C. 'Hystrichosheres', (acritarchs), and spores of the Wenlock Shales, (Silurian), of Wenlock, England. |
1963 |