| original |
Tremadocian |
|
Canada(Alberta) |
Martin,F. Uppermost Cambrian and Lower Ordovician acritarchs and Lower Ordovician chitinozoans from Wilcox Pass, Alberta. |
1992 |
| details |
Late Cambrian |
|
S.Ireland(Wexford) |
Moczydlowska,M. et al. Late Cambrian acrtiarchs and their ace constraints on an Ediacar type fauna from the Booley Bay Formation, County Wexfordsheire. |
1995 |
| details |
Tremadocian |
|
Canada(Alberta) |
Molyneux,S.G. et al. Paleozoic phytoplankton. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |