| details |
Ordovician |
Early Devonian |
USSR(Russian Platform) |
Umnova,N.I. et al. Acritarchs from the Yaroslavskoi series of the northern part of the Russian Platform |
1970 |
| original |
Ordovician |
|
USSR(Yaroslav) |
Umnova,N.I. et al. Acritarchs from the Yaroslavskoi series of the northern part of the Russian Platform |
1970 |
| original |
Ordovician |
|
USSR(Yaroslav) |
Umnova,N.I. et al. Acritarchs from the Yaroslavskoi series of the northern part of the Russian Platform |
1970 |
| details |
Early Devonian |
Ordovician |
USSR(Russian Platform) |
Umnova,N.I. et al. Acritarchs from the Yaroslavskoi series of the northern part of the Russian Platform |
1970 |
| details |
Tremadocian |
|
USSR(Russian Platform) |
Umnova,N.I. et al. Acritarch assemblages from the Cambrian and Early Ordovician sediments of western and northwestern Russian Platform. (In: Palynology research in Byelorussia and other Regions of the USSR) |
1971 |
| details |
Tremadocian |
Llandoverian |
USSR(Russian Platform) |
Umnova,N.I. Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform. |
1974 |
| details |
Arenigian |
Llandoverian |
USSR(Russian Platform) |
Umnova,N.I. Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform. |
1974 |
| details |
Arenigian |
Llandoverian |
USSR(Pre-Baltic) |
Umnova,N.I. Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform. |
1974 |
| details |
Ordovician |
Silurian |
USSR(Russian Platform) |
Umnova,N.I. Ordovician and Silurian acritarchs of the Moscow Basin and Prebaltic |
1975 |
| details |
Silurian |
|
USSR(Russian Platform) |
Umnova,N.I. Ordovician and Silurian acritarchs of the Moscow Basin and Prebaltic |
1975 |
| details |
Late Tremadocian |
Early Arenigian |
USSR(European) |
Rybnikova,M.B. et al. Differentiation of Lower Ordovician terrigenous /Sediments in the Moscow Syneclise |
1984 |
| details |
Ordovician |
Early Devonian |
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 |
| details |
Cambrian |
Ordovician |
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 |
| details |
Ordovician |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Ordovician |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |