| details |
Arenigian |
Llanvirnian |
Morocco |
Fournier-Vinas,C. Ordovician acritarchs of Zekkara, (East Morocco). |
1985 |
| details |
Arenigian |
|
China(Yunnan) |
Fang,X. Ordovician micropaleoplants in Kunming-Luguan Region, Yunnan Province and their stratigraphical significance. |
1985 |
| details |
Late Ordovician |
Early Gothlandian |
Czechoslovakia |
VavrdovЎ,M. Plant microfossils and the effect of contact metamorphosis upon the test walls of acritarchs. |
1984 |
| details |
Llandeilian |
|
Wales |
Trythall,R.J.B. et al. Age and controls of Ironstone deposition (Ordovician) North Wales. |
1987 |
| details |
Late Arenigian |
Early Llanvirnian |
Czechoslovakia |
VavrdovЎ,M. Nethromorphitae and some other acritarchs from the Bohemian Lower Ordovician |
1978 |
| details |
Late Llanvirnian |
Early Ludlovian |
Morocco |
Cramer,F.H. et al. Early Ordovician acritarchs from the Tadla Basin of Morocco. |
1974 |
| details |
Arenigian |
|
China(Yunnan) |
Fang,X. Ordovician micropaleoflora in Kunming-Luquan Region, Yunnan Province, and its stratigraphical significance. |
1987 |
| details |
Early Arenigian |
|
France |
Rauscher,R. Ordovician acritarchs from France. |
1974 |
| details |
Late Arenigian |
Llanvirnian |
Czechoslovakia |
VavrdovЎ,M. Acritarchs from the Sarka Formation (Llanvirnian). |
1977 |
| details |
Arenigian |
Wenlockian |
Nd |
Diez,M.D.C.R. et al. Range chart of selected Lower Paleozoic acritarch Taxa. 2: Index to Parts 1 and 2. |
1977 |
| details |
Late Arenigian |
Early Llanvirnian |
Morocco |
Cramer,F.H. et al. Late Arenigian (Ordovician) acritarchs from Cis-Saharan Morocco. |
1977 |
| details |
Arenigian |
|
France(Aveyron) |
Fournier-Vinas,C. et al. Lower Ordovician and Cambrian acritarchs from the Mountains East of Laucaune, (Aveyron).Northern Slope of the Black Mountains. |
1977 |
| details |
Arenigian |
|
Canada(Newfoundland) |
Dean,W.T. et al. Lower Ordovician acritarchs and Trilobites from Bell Island, Eastern Newfoundland. |
1978 |
| details |
Late Tremadocian |
Arenigian |
Iran |
Ghavidel-Syooki,M. Biostratigraphy and paleo-biogeography of some Paleozoic rocks at Zagros and Alborz Mountains. |
1994 |
| details |
Nd |
|
Nd |
Servais,T. et al. Variability in the Ordovician acritarch Dicrodiacrodium |
1996 |
| details |
Early Llanvirnian |
|
England(Suffolk) |
Molyneux,S.G. The contribution of Palaeontological data to an understanding of the Early Palaeozoic framework of eastern England |
1991 |
| details |
Arenigian |
|
Pakistan |
Le Fort,P. et al. Discovery of a Crystalline Basement and Early Ordovician marine transgression in the Karakorum Mountain range, Pakistan. |
1994 |