| details |
Barremian |
Aptian |
North America |
Doyle,J.A. et al. Early Cretaceous tetrads, zonasulcate pollen and Winteraceae. 2: Cladistic analysis and implication implications. |
1990 |
| details |
Barremian |
Aptian |
Nd |
Doyle,J.A. et al. Phylogenies and angiosperm diversification |
1993 |
| details |
Early Albian |
Middle Albian |
Virginia |
Crane,P.R. et al. Palaeobotanical evidence on the Early Radiation of Magnoliid angiosperms. (In: Early Evolution of Flowers. R.K. Endress and E.M. Friis, editors) |
1994 |
| details |
Barremian |
Albian |
Egypt |
Ibrahim,M.I.A. et al. Late Jurassic-Early Cretaceous dinoflagellate cyst assemblages from the Eastern Desert of Egypt |
1997 |
| details |
Barremian |
Albian |
Egypt |
Ibrahim,M.I.A. et al. Palynostratigraphy of Jurrasic to Lower Cretaceous sequences from the Eastern Desert of Egypt. |
2001 |