| details |
Tremadocian |
|
England(Shropshire) |
Rasul,S.M. Acritarch zonation of the Tremadoc Series of the Shineton Shales, Wrekin, Shropshire, England. |
1979 |
| details |
Late Tremadocian |
|
England(Cumberland) |
Molyneux,S.G. et al. Discovery of Tremadoc rocks in the Lake District. |
1984 |
| 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 |
Tremadocian |
|
USSR(Estonian SSR) |
Mens,K.A. et al. Cambrian-Ordovician boundary Beds at Maekalda, Tallinn, North Estonia. |
1989 |
| details |
Late Tremadocian |
Arenigian |
England(Cumberland) |
Cooper,A.H. et al. The age and correlation of Skiddaw Group (Early Ordovician), sediments in the Cross Fell Inlier (Northern England) |
1990 |
| details |
Late Tremadocian |
Early Arenigian |
England(Cumberland) |
Cooper,A.H. et al. The age and correlation of Skiddaw Group (Early Ordovician), sediments in the Cross Fell Inlier (Northern England) |
1990 |
| details |
Late Arenigian |
|
Wales(Caernarvonshire) |
Molyneux,S.G. Advances and problems in Ordovician palynology in England and Wales |
1990 |
| details |
Late Arenigian |
|
Wales(Carmarthenshire) |
Molyneux,S.G. Advances and problems in Ordovician palynology in England and Wales |
1990 |
| details |
Tremadocian |
|
England(Shropshire) |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Early Tremadocian |
|
England(Cumberland) |
Cooper,A.H. et al. The stratigraphy, correlation, provenance and palaeogeography of the Skiddaw Group (Ordovician) in the English Lake District |
1995 |
| details |
Late Tremadocian |
|
Nd |
Molyneux,S.G. et al. Paleozoic phytoplankton. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |
| details |
Late Cambrian |
Early Ordovician |
Algeria |
Stricanne,L. et al. A statistical approach to classification of the Cambro-Ordovician galeate acritarch plexus |
2002 |