| details |
Early Aptian |
|
Virginia |
Ward,J.V. et al. Probable Granular Magnoliid angiosperm pollen from the Early Cretaceous |
1989 |
| original |
Early Aptian |
|
Delaware |
Ward,J.V. et al. Probable Granular Magnoliid angiosperm pollen from the Early Cretaceous |
1989 |
| details |
Early Aptian |
|
Delaware |
Doyle,J.A. et al. Diversification of early angiosperm pollen in cladistic context. (In: Pollen and Spores, Patterns of Diversification. S.Blackmore and S.H.Barnes, editors) |
1991 |
| details |
Early Aptian |
|
Maryland |
Doyle,J.A. Revised palynological correlations of the Lower Potomac Group (USA) and the Cocobeach sequence of Gabon (Barremian-Aptian) |
1992 |