| details |
Late Hettangian |
Sinemurian |
Denmark |
Koppelhus,E.B. Palynology of the Lower Jurassic Ronne Formation on Bornholm, Eastern Denmark. |
1991 |
| details |
Hettangian |
Early Sinemurian |
W.Germany(Hesse) |
Koppelhus,E.B. Palynology of the Lower Jurassic Ronne Formation on Bornholm, Eastern Denmark. |
1991 |
| details |
Late Volgian |
Valanginian |
USSR(Yamalo-Nenets) |
Vakhrameev,V.A. et al. The boundry between the Jurassic and Cretaceous on the palynologic data |
1980 |
| original |
Hettangian |
Early Sinemurian |
W.Germany(Hesse) |
Schulz,E. The spores of the genus Stereisporites Thompson and Pflug,1953 from the Early Mesophytic of the German Basin |
1970 |