| details |
Aptian |
Early Albian |
Canada(Alberta) |
Wightman,D.M. et al. Depositional modelling of the Upper Mannville (Lower Cretaceous), eastcentral Alberta. Implications for the recognition of brackish-water deposits. (In: Reservoir Sedimentology. R. Tillman and K.J. Weber, editors) |
1987 |
| details |
Telychian |
Wenlockian |
Scotland(Dumfries) |
White,D.E. et al. Biostratigraphy of Late Llandovery (Telychian) and Wenlock Turbiditic sequences in the southwest Southern Uplands, Scotland. |
1992 |
| details |
Late Ludlovian |
|
England(Herefordshire) |
Wetherall,P.M. et al. Palynology, biostratigraphy, and depositional environments around the Ludlow-Pridoli boundary at Woodbury Quarry, Herefordshire, England. |
1999 |
| details |
Ludlovian |
Downtonian |
Wales |
Warren,P.T. The significance of recent research in Britain on the Ludovian-Downtonian boundary. (In: The boundary between the Silurian and Devonian and Biostratigraphy of the Silurian. D.V.Nalivkin, editors) |
1971 |
| original |
Early Permian |
|
United Kingdom |
Wall,D. et al. Permian Hystrichospheres from Britain. |
1963 |
| original |
Early Permian |
|
United Kingdom |
Wall,D. et al. Permian Hystrichospheres from Britain. |
1963 |
| original |
Early Permian |
|
United Kingdom |
Wall,D. et al. Permian Hystrichospheres from Britain. |
1963 |
| original |
Early Permian |
|
United Kingdom |
Wall,D. et al. Permian Hystrichospheres from Britain. |
1963 |
| details |
Early Permian |
|
United Kingdom |
Wall,D. et al. Permian Hystrichospheres from Britain. |
1963 |
| details |
Early Arenigian |
|
Argentina(Salta) |
Vergel,M.D.M. et al. Ordovician palynomorphs of Argentina: An integrated approach. (Aspects of the Ordovician System in Argentina.) |
2002 |
| details |
Arenigian |
|
Czechoslovakia |
VavrdovЎ,M. Ordovician acritarchs from Central Bohemia. |
1965 |
| details |
Arenigian |
|
Czechoslovakia |
VavrdovЎ,M. Ordovician acritarchs from Central Bohemia. |
1965 |
| details |
Late Caradocian |
|
Czechoslovakia |
VavrdovЎ,M. Ordovician acritarchs from Central Bohemia. |
1965 |
| details |
Early Ashgillian |
|
Czechoslovakia |
VavrdovЎ,M. Ordovician acritarchs from Central Bohemia. |
1965 |
| details |
Siegenian |
|
Belgium |
Vanguestaine,M. Reworked acritarchs in the Siegenian and Emsian (Lower Devonian), from Dinant Synclinorium, (Belgium). |
1979 |
| details |
Early Llandoverian |
|
USSR(Estonian SSR) |
Uutela,A. et al. Ordovician acritarchs from the Rapla borehole, Estonia |
1991 |
| details |
Middle Ordovician |
|
USSR(Yaroslav) |
Umnova,N.I. et al. Acritarchs from the Yaroslavskoi series of the northern part of the Russian Platform |
1970 |