| original |
Late Liassic |
Early Dogger |
France(Pas-de-Calais) |
Danze,J. et al. Palynological study of a Clay found at the Lias-Dogger Boundry in a drilling at Boulogne-sur-Mer. |
1963 |
| details |
Liassic |
Dogger |
France |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 4. Supplement to all Groups, (Turmae). |
1966 |
| details |
Toarcian |
Aalenian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Toarcian |
Aalenian |
France |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |