| details |
Arenigian |
|
Tunisia |
Vecoli,M. et al. Palynostratigraphy of Upper Cambrian-upper Ordovician intracratonic clastic sequences, North Africa. |
1999 |
| details |
Arenigian |
|
Turkey |
Dean,W.T. et al. Ordovician biostratigraphic correlation in Southern Turkey. (In: Global Perspectives on Ordovician Geology. B.D. Webby and J.R. Laurie, editors) |
1992 |
| details |
Late Tremadocian |
Early Llanvirnian |
USA |
Servais,T. et al. Recognition of the Trans-European Suture Zone (TESZ) by the palaeobiogeographical distribution pattern of early to middle Ordovician acritarchs. |
1997 |
| details |
Llandeilian |
|
Wales |
Trythall,R.J.B. et al. Age and controls of Ironstone deposition (Ordovician) North Wales. |
1987 |
| details |
Llanvirnian |
Llandeilian |
Wales |
Young,T.P. Discussion of a revision of the age of the Hen-dy-capel Ooidal Ironstone, (Ordovician), Llanenga, North Wales. (T.P.Young and Reply T.P.Young) |
1993 |