| original |
Early Aptian |
|
USSR(Kazakh SSR) |
Shakhmundes,V.A. The findings of Acanthodiacrodium Timofeev,1958 in Lower Cretaceous deposits of the northern part of Caspian Region. |
1971 |
| details |
Early Aptian |
Early Albian |
USSR(Kazakh SSR) |
Shakhmundes,V.A. Lower Cretaceous microphytoplankton of the northern Pre-Caspian and their significance for stratigraphy and paleogeogaphy. (In: Microfossils USSR. T.F.Vozzhennikova et al, editors) |
1974 |
| details |
Aptian |
|
USSR(Kazakh SSR) |
Fedorova-Shakhmundes,V.A. Aptian oryctocoenosis of unicellular planctonic algae of northern Pre-Caspian and their facial characteristics. (In: Ecostratigraphy and Ecological Systems of the Geological Past.) |
1980 |
| details |
Aptian |
|
USSR(Kazakh SSR) |
Fedorova,V.A. The role of organic microphyloplancton in correlating separate sections (On first studies of Apt deposits of northern Pre-Caspian). (In: Mikrofitofossilii v neftyanoi geologii. N. A. Timoshina, editor) |
1980 |
| details |
Early Aptian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |