| details |
Aptian |
|
Maryland |
Doyle,J.A. et al. Early Cretaceous tetrads, Zonasulculate pollen and Winteraceae. 1: Taxonomy, morphology and ultrastructure. |
1990 |
| details |
Late Triassic |
Middle Jurassic |
China |
Doyle,J.A. et al. Early Cretaceous tetrads, Zonasulculate pollen and Winteraceae. 1: Taxonomy, morphology and ultrastructure. |
1990 |
| details |
Late Barremian |
Middle Aptian |
Maryland |
Doyle,J.A. Revised palynological correlations of the Lower Potomac Group (USA) and the Cocobeach sequence of Gabon (Barremian-Aptian) |
1992 |
| details |
Albian |
|
Egypt |
Ibrahim,M.I.A. et al. Palynostratigraphy of Jurrasic to Lower Cretaceous sequences from the Eastern Desert of Egypt. |
2001 |