| details |
Early Barstovian |
Middle Barstovian |
Canada(British Columbia) |
Champigny,N. et al. New evidence for the age of the Skonun Formation, Queen Charlotte Islands, British Columbia. |
1981 |
| details |
Chattian |
|
N.Ireland(Tyrone) |
Wilkinson,G.C. et al. The geology and palynology of the Oligocene Lough Neagh Clays, Northern Ireland. |
1980 |
| details |
Chattian |
|
Wales |
Wilkinson,G.C. et al. The geology and palynology of the Oligocene Lough Neagh Clays, Northern Ireland. |
1980 |
| details |
Chattian |
|
England(Devonshire) |
Wilkinson,G.C. et al. The geology and palynology of the Oligocene Lough Neagh Clays, Northern Ireland. |
1980 |
| details |
Bartonian |
|
England |
Collinson,M.E. et al. Floristic changes indicate a Cooling climate in the Eocene of Southern England. |
1981 |