| details |
Botomian |
|
Australia(S.Australia) |
Jago,J.B. et al. Correlation within early Palaeozoic basins of eastern South Australia. |
2002 |
| details |
Berriasian |
Hauterivian |
South America |
Riccardi,A.C. The Cretaceous System of southern South America. |
1988 |
| details |
Barremian |
|
|
Volkheimer,W. Fossil microfloras. |
1978 |
| details |
Ashgillian |
|
Bulgaria |
Kalvacheva,R.K. Acritarch stratigraphy of Lower Paleozoic formations in the West Balkan Mountains, Bulgaria. |
1978 |
| details |
Arenigian |
Llanvirnian |
Germany(Saxony) |
Walter,H. et al. Paleozoic microfossils from the northern Margin of the Erzgebir Mountains, (Saxony). |
1998 |