| original |
Middle Cambrian |
|
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 |
Middle Cambrian |
Late Cambrian |
USSR(Russian Platform) |
Umnova,N.I. Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform. |
1974 |
| details |
Middle Cambrian |
Late Cambrian |
USSR(Pre-Baltic) |
Umnova,N.I. Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform. |
1974 |
| details |
Early Cambrian |
|
USSR(Lithuanian SSR) |
Yankauskas,T.V. New evidence to the geological evolution of Cis-Baltic Regions in Cambrian time |
1975 |
| details |
Early Cambrian |
|
Baltic |
Yankauskas,T.V. Revision of the age of the "Cambro-Ordoviciennes" formations of the Baltic Region by micropaleontological analysis. (Acritarchs and chitinozoes) |
1976 |
| details |
Middle Cambrian |
|
USSR(Latvian SSR) |
Brangulis,A.P. et al. The history of stratigraphic studies of the Cambrian deposits of Latvia. (In: Ocherki Geologii Latvii. A.P. Brangulis, editor) |
1978 |
| details |
Middle Cambrian |
|
USSR(Baltic) |
Aren,B. et al. The Baltic Syncline. (In: Stratigraphy of Upper Precambrian and Cambrian deposits on the western part of the East European Platform. B.M.Keller and A.Y.Rozanov, editors) |
1979 |
| details |
Early Cambrian |
Middle Cambrian |
USSR(Leningrad) |
Borovko,N.G. et al. The reference section of Cambrian and Ordovician boundry sediments at North-West Russian Plate (Izhora River) |
1984 |
| details |
Middle Cambrian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |