| details |
Ordovician |
Silurian |
USSR(Russian Platform) |
Umnova,N.I. Ordovician and Silurian acritarchs of the Moscow Basin and Prebaltic |
1975 |
| original |
Llanvirnian |
|
USSR(Yaroslav) |
Umnova,N.I. Ordovician and Silurian acritarchs of the Moscow Basin and Prebaltic |
1975 |
| details |
Vendian |
Early Cambrian |
Romania |
Olaru,L. et al. Palynostratigraphy of some metamorphic Formations of the eastern Carpatians of Roumania |
1984 |
| details |
Tremadocian |
|
USSR(European) |
Rybnikova,M.B. et al. Differentiation of Lower Ordovician terrigenous /Sediments in the Moscow Syneclise |
1984 |
| details |
Cambrian |
Silurian |
USSR(Buryat ASSR) |
Butov,Y.P. Some problems of Pre-Mesozoic stratigraphy of Savan-Baikal Mountain Region. 2. New data on the age of Pre-Mesozoic deposits. |
1986 |