| original |
Late Llanvirnian |
|
E.Germany(Rostock) |
Burmann,G. Further organic microfossils from the Lower Ordovician. |
1970 |
| details |
Early Paleozoic |
|
Nd |
Cramer,F.H. et al. Lower Paleozoic acritarchs. |
1979 |
| details |
Arenigian |
Llanvirnian |
England(Cumberland) |
Turner,R.E. et al. Acritarch dating of Arenig Volcanism in the Lake District. |
1979 |
| details |
Arenigian |
Llanvirnian |
Ireland(Isle Of Man) |
Molyneux,S.G. New evidence for the age of the Manx Group, Isle of Man. |
1979 |
| details |
Caradocian |
|
England(Shropshire) |
Turner,R.E. Reworked acritarchs from the type section of the Ordovician Caradoc series. Shropshire. |
1982 |
| details |
Arenigian |
Early Llanvirnian |
United Kingdom |
Downie,C. Acritarchs in British stratigraphy |
1984 |
| details |
Llandeilian |
|
Wales |
Trythall,R.J.B. et al. Age and controls of Ironstone deposition (Ordovician) North Wales. |
1987 |
| details |
Late Arenigian |
|
Wales |
Molyneux,S.G. Appendix: Acritarchs and chitinozoa from the Arenig series of southwest Wales. (In: The Arenig Series in South Wales: Stratigraphy and palaeontology.) |
1987 |
| details |
Late Arenigian |
|
England(Lancashire) |
Rushton,A.W.A. et al. The biostratigraphic age of the Skiddaw Group in the Black Combe Inlier, English Lake District. |
1989 |
| details |
Late Arenigian |
|
England(Cumberland) |
Molyneux,S.G. Advances and problems in Ordovician palynology in England and Wales |
1990 |
| details |
Early Llanvirnian |
|
Wales(Caernarvonshire) |
Molyneux,S.G. Advances and problems in Ordovician palynology in England and Wales |
1990 |
| details |
Late Llanvirnian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Ordovician |
|
Czechoslovakia |
VavrdovЎ,M. Coenobial acritarchs and other palynomorphs from the Arenig/ Llanvirn boundary, Prague Basin. |
1990 |
| details |
Caradocian |
Ashgillian |
Belgium |
Herbosch,A. et al. Study of the lithostratigraphic, biostratigraphic and sedimentology of the Lessines borehole (Southern Boarder of the Brabant Massive, Belgium) |
1991 |
| details |
Ordovician |
Llandeilian |
Belgium |
Servais,T. Contribution to the stratigraphy of the Ordovician Rigenee Formation (Brabant Massif, Belgium) with a preliminary study on acritarchs. |
1991 |
| details |
Llanvirnian |
|
Wales(Gwynedd) |
Millward,D. et al. Field and biostratigraphic evidence for an unconformity at the Base of the Eycott Volcanic Group in the English Lake District |
1992 |
| details |
Arenigian |
|
Austria |
Reitz,E. et al. Palynological evidence for Lower Ordovician rocks (Tremadoc and Arenig) in the northern Greywacke zone (Eastern Alps) |
1992 |