| details |
Volgian |
|
USSR(Orenburg) |
Orlova,E.D. Palynological characteristic of the Volgian and Lower Cretaceous deposits from the Volga Region and the Western Orenburg Predurale. (In: Problems of Modern Palynology. A.F.Chlonova, editor) |
1984 |
| original |
Sinemurian |
|
Scotland(Sutherland) |
Couper,R.A. British Mesozoic microspores and pollen grains, a systematic and stratigraphic study. |
1958 |
| original |
Toarcian |
|
England(Yorkshire) |
Couper,R.A. British Mesozoic microspores and pollen grains, a systematic and stratigraphic study. |
1958 |