| details |
Artinskian |
|
USSR(Kazakh SSR) |
Dalyan,I.B. et al. Palynological separation of the stratigraphy of Lower Permian deposits of the eastern Border zone of the Precaspian Depression |
1977 |
| details |
Aquitanian |
Serravallian |
England |
Powell,A.J. A preliminary investigation into the Neogene dinoflagellate cyst biostratigraphy of the British southwestern approaches. |
1988 |
| details |
Aptian |
Early Albian |
Canada(Arctic) |
Brenner,G.J. Middle Cretaceous floral Provinces and Early migrations of angiosperms. (In: Origin and Early Evolution of Angiosperms.C.B.Beck, editor) |
1976 |
| details |
|
|
Atlantic Ocean |
Wohlfeil,K. A spore assemblage in Claystone Boulders from the Iceland-Faeroe Ridge, (North Atlantic) and their significance for dropstones from this region. |
1984 |
| details |
|
|
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 |