| details |
Late Cambrian |
|
Africa(N.Africa) |
Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary |
1997 |
| details |
Late Tremadocian |
|
Africa(N.Africa) |
Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary |
1997 |
| details |
Tremadocian |
|
Argentina |
Bultynck,P. et al. Lower Ordovician conodonts and acritarchs and Lower Silurian acritarchs of the northern part of the Argentinian Cordillera. |
1982 |
| details |
Late Cambrian |
|
Argentina |
Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary |
1997 |
| details |
Early Llanvirnian |
|
Belgium |
Servais,T. et al. Lower Llanvirn, (Ordovician), graptolites and acritarchs from the Assise de Huy Bande de Sambre-et-Meuse, Belgium. |
1993 |
| details |
Late Cambrian |
|
Belgium |
Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary |
1997 |
| details |
Ordovician |
|
Brazil(Amazonas) |
de Quadros,L.P. et al. Ordovician acritarchae in the Alto Amazonas Sub-Basin, Brazil. |
1986 |
| details |
Arenigian |
Llanvirnian |
Brazil(Amazonas) |
de Quadros,L.P. Occurence of Ordovician microfossils (Acritarchae) in the Alto Amazon Sub Basin, Brazil. |
1986 |
| details |
Ordovician |
Silurian |
Bulgaria |
Kalvacheva,R.K. Preliminary results from palynological studies of the Lower Paleozoic in the Iskur Gorge. |
1972 |
| details |
Llanvirnian |
|
Bulgaria |
Kalvacheva,R.K. et al. Occurence of acritarchs in the Lower Paleozoic in the Iskur Gorge. (In: Mikrofossilii Drevneishikh Otlozhenii. T.F.Vozzhennikova and T.B.Timofeev, editors) |
1973 |
| details |
Late Cambrian |
Arenigian |
Canada(Newfoundland) |
Martin,F. Some aspects of Late Cambrian and Early Ordovician acritarchs. |
1982 |
| details |
Late Cambrian |
Early Tremadocian |
Canada(Newfoundland) |
Parsons,M.G. et al. Three new assemblages of acritarchs from Late Upper Cambrian to Early Tremadocian rocks of Random Island, Trinity Bay, Eastern Newfoundland. |
1986 |
| details |
Middle Cambrian |
Tremadocian |
Canada(Newfoundland) |
Parsons,M.G. et al. The biostratigraphic potential of Middle Cambrian to Tremadocian acritarchs; Modification of existing zonal schemes based on material from conception and Trinity Bays, Newfoundland and St.John, New Brunswick. |
1990 |
| details |
Late Cambrian |
|
Canada(Newfoundland) |
Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary |
1997 |
| details |
Tremadocian |
|
Canada(Nova Scotia) |
Keppie,J.D. Tremadocian acritarchs from Gillis Brook, Boisdale Hills, Cape Breton Island. |
1980 |
| details |
Early Ordovician |
|
China(Hupei) |
Yin,L.-M. New forms of acritarch from Early Ordovician sediments in Yichang, Hubei, China. |
1994 |
| details |
Late Cambrian |
|
China(Kirin) |
Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary |
1997 |