| original |
Portlandian |
Ryazanian |
Europe |
Davey,R.J. The stratigraphic distribution of dinocysts in the Portlandian (Latest Jurassic) to Barremian (Early Cretaceous), of northeast Europe. |
1979 |
| original |
Early Portlandian |
Ryazanian |
Denmark |
Davey,R.J. Dinocysts stratigraphy of the latest Jurassic to Early Cretaceous of the Haldager No.1 borehole, Denmark. |
1982 |
| original |
Early Portlandian |
|
England(Sussex) |
Wimbledon,W.A. et al. The Portland-Purbeck Junction (Portlandian-Berriasian) in the Weald and correlation of Latest Jurassic-Early Cretaceous rocks in Southern England |
1983 |
| original |
Early Aptian |
|
England(Isle of Wight) |
Duxbury,S. A study of dinoflagellate cysts and acritarchs from the Lower Greensand (Aptian to Lower Albian) of the Isle of Wight,
southern England. |
1983 |
| original |
Portlandian |
|
England(Dorset) |
Norris,G. et al. Fine wallstructure of selected Upper Jurassic Gonyaulacystinean dinoflagellate cysts from Southern England |
1984 |