| details |
Barremian |
Aptian |
Spain |
Doubinger,J. et al. A Barremian microflora in the Province of Valencia, Spain. |
1981 |
| details |
Hauterivian |
Early Cenomanian |
Spain |
Mas,J.R. The Lower Cretaceous of Northwestern Valencia |
1981 |
| details |
Early Cretaceous |
|
Maryland |
Fensome,R.A. Taxonomy and biostratigraphy of Schizaealean spores from the Jurassic-Cretaceous boundary beds of the Aklavik Range, District of MacKenzie |
1987 |
| original |
Early Cretaceous |
|
Maryland |
Fensome,R.A. Miospores from the Jurassic-Cretaceous boundary beds, Aklavik Range, Northwest Territories, Canada. (Incorporating taxonomic reviews of several Groups of Mid-Late Mesozoic miospores) |
1983 |