| details |
Llandeilian |
|
France(Vendee) |
Deflandre,G. et al. Presence of Ordovician acritarchs in the Slates of the Underschists of the Region of Mothe-Achard (Vendee). Extension of the Siurian, (Armorician Sandstone and Schist of Angers), in the Venee Sea Coast. |
1966 |
| details |
Siegenian |
Emsian |
Spain |
Cramer,F.H. A provisional note on the occurrence of microplankton and sporomorphs in the sedimentary rocks of the Lower Devonia in the Cantabrian Mountains |
1963 |
| details |
Silurian |
|
Nd |
Cramer,F.H. Distribution of selected Silurian acritarchs an account of the palynostratigraphy and paleogeography of selected Silurian acritarch Taxa |
1970 |
| details |
Silurian |
|
USSR(Buryat ASSR) |
Butov,Y.P. Some problems of Pre-Mesozoic stratigraphy of Savan-Baikal Mountain Region. 2. New data on the age of Pre-Mesozoic deposits. |
1986 |
| details |
Silurian |
Devonian |
Brazil(Maranhao) |
Brito,I.M. Contribution to the knowledge of Silurian and Devonian microfossils from the State of Maranhao LII. genus Veryhachium (Acritarchs). |
1968 |
| details |
Ludlovian |
|
Romania |
Beju,D. Zoning and correlation of the Paleozoic of the Moesian Platform on the basis of palynoprotistological assemblages.1. |
1972 |
| details |
Early Llandoverian |
Middle Llandoverian |
Argentina(San Juan) |
Baldis,B. et al. The Ordovician-Silurian boundary in the Sierra de Villicum, Argentine Precordillera. (In: A Global Analysis of the Ordovician-Silurian Boundary. L.R.M.Cocks and R.B.Rickards, editors) |
1988 |
| details |
Late Arenigian |
Early Llanvirnian |
England(Cumberland) |
Arthurton,R.S. et al. Ordovician and Silurian. (In: Geology of the Country around Penrith.) |
1981 |
| details |
Ludlovian |
Downtonian |
USSR(Estonian SSR) |
Aristova,K.E. et al. Microfossils of stratigraphic type sections from the Upper Silurian of Estonia. |
1976 |