| details |
Late Cambrian |
|
Wales(Gwynedd) |
Young,T. et al. Cambrian stratigraphy of St.Tudwal's Peninsula, Gwynedd, Northwest Wales |
1994 |
| details |
Tremadocian |
Early Arenigian |
Spain |
Wolf,R. The Lower and Upper boundary of the Ordovician System of some selected regions, (Celtiberia, Eastern Sierra Morena) in Spain. Part 1: The Lower Ordovician Sequence of Celtiberia. |
1980 |
| details |
Nd |
|
Nd |
Williams,G.L. et al. The Lentin and Williams Index of Fossil Dinoflagellates.1998 Edition. |
1998 |
| details |
Early Telychian |
|
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 Tremadocian |
|
Norway |
Welsch,M. The acritarchs of the Upper Digermul Group, Middle Cambrian to Tremadoc, Eastern Finnmark, Northern Norway. |
1986 |
| details |
Tremadocian |
|
USSR(Estonian SSR) |
Volkova,N.A. The age of the Ulgazek Series at the Cambrian - Ordovician contact in Estonia. |
1982 |
| details |
Late Cambrian |
Early Tremadocian |
USSR(Estonian SSR) |
Volkova,N.A. Middle and Upper Cambrian acritarchs in the East-European Platform |
1990 |
| details |
Late Cambrian |
|
USSR(Estonian SSR) |
Volkova,N.A. Middle and Upper Cambrian acritarchs in the East-European Platform |
1990 |
| details |
Tremadocian |
|
Estonia |
Volkova,N.A. Acritarchs from the Cambrian-Ordovician boundary sediments of northern Estonia |
1989 |
| details |
Late Cambrian |
Early Tremadocian |
USSR(Estonian SSR) |
Volkova,N.A. Acritarchs of the Desposits of the Cambrian-Ordovician boundary northern Estonia |
1989 |
| details |
Late Cambrian |
|
Estonia |
Volkova,N.A. Acritarchs from the Cambrian - Ordovician Boundary Beds, (Boring Core M-56), of the Estonian, near Clint Area. |
1993 |
| details |
Early Tremadocian |
|
Argentina(Salta) |
Vergel,M.D.M. et al. Ordovician palynomorphs of Argentina: An integrated approach. (Aspects of the Ordovician System in Argentina.) |
2002 |
| details |
Late Tremadocian |
|
Argentina(Salta) |
Vergel,M.D.M. et al. Ordovician palynomorphs of Argentina: An integrated approach. (Aspects of the Ordovician System in Argentina.) |
2002 |
| details |
Early Tremadocian |
Middle Tremadocian |
Algeria |
Vecoli,M. et al. Remarks on the Cambrian-Ordovician boundary in the Algerian Sahara (Hassi-Rmel area) |
1995 |
| details |
Late Tremadocian |
|
Algeria |
Vecoli,M. Stratigraphic significance of acritarchs in Cambro-Ordovician boundary strata, Hassi-Rmel area, Algerian Sahara |
1996 |
| details |
Early Tremadocian |
|
Algeria |
Vecoli,M. et al. Stratigraphically significant acritarchs in Uppermost Cambrian Basal Ordovician strata of northwestern Algeria. |
1997 |
| details |
Tremadocian |
|
Tunisia |
Vecoli,M. et al. Palynostratigraphy of Upper Cambrian-upper Ordovician intracratonic clastic sequences, North Africa. |
1999 |