| details |
Early Paleozoic |
|
Nd |
Cramer,F.H. et al. Lower Paleozoic acritarchs. |
1979 |
| details |
Early Paleozoic |
|
Nd |
Cramer,F.H. et al. Lower Paleozoic acritarchs. |
1979 |
| details |
Early Paleozoic |
|
Nd |
Cramer,F.H. et al. Lower Paleozoic acritarchs. |
1979 |
| details |
Early Llandoverian |
Middle Llandoverian |
Spain |
Hafenrichter,M. The lower and upper boundary of the Ordovician system of some selected regions, (Celtiberia, Eastern Sierramorena) in Spain. Part 2. The Ordovician/Silurian bounday in Spain. |
1980 |
| details |
Late Ludlovian |
|
Guinea |
Baudelot,S. et al. Presence of microplankton from Upper Ludlovian in the locality of Tomboya, (Gunea) |
1980 |
| details |
Silurian |
|
Canada(Anticosti Island) |
Duffield,S.L. et al. Acritarch biostratigraphy of Upper Ordovician-Lower Silurian rocks, Anticosti Island, Quebec. |
1981 |
| details |
Silurian |
|
Canada(Anticosti Island) |
Duffield,S.L. et al. Acritarch biostratigraphy of Upper Ordovician-Lower Silurian rocks, Anticosti Island, Quebec. |
1981 |
| details |
Late Ashgillian |
Early Llandoverian |
Canada(Anticosti Island) |
Duffield,S.L. et al. Acritarch biostratigraphy of the Ordovician-Silurian boundary beds and the Llandoverian, Anticosti Island,Quebec. |
1981 |
| details |
Late Wenlockian |
Early Siegenian |
Spain |
Rodriguez Gonzalez,R.M. Palynology of the Upper Silurian-Lower Devonian Formations of the Cantabrica Cordillera, Northeast Spain. |
1983 |
| details |
Ludlovian |
Pridolian |
Spain |
Rodriguez Gonzalez,R.M. Palynology of the Upper Silurian-Lower Devonian Formations of the Cantabrica Cordillera, Northeast Spain. |
1983 |
| details |
Ordovician |
Silurian |
India(Himachal Pradesh) |
Khanna,A.K. et al. Reappraisal of stratigraphic status of Pin Dolomite |
1983 |
| details |
Early Wenlockian |
|
Sweden |
Le H©riss©,A. Organic walled microplankton from the Silurian of Gotland, (Sweden): Electron microscopical observations on excystment structures. |
1984 |
| details |
Late Llandoverian |
|
USSR(Krasnoyarsk Kray) |
Sheshegova,L.I. The acritarchs of the Silurian of the northern Siberian Platform |
1984 |
| details |
Middle Ordovician |
Early Gothlandian |
India(Himachal Pradesh) |
Khanna,A.K. Lower Palaeozoic acritarchs from Pin Dolomite, Tethys Himalaya. (In: Proceedings, Symposium and Technical Sessions. R.S. Tiwari, editors) |
1984 |
| details |
Early Wenlockian |
Early Wenlockian |
Sweden |
Le H©riss©,A. Organic walled microplankton from the Silurian of Gotland, (Sweden): Electron microscopical observations on excystment structures. |
1984 |
| details |
Late Caradocian |
Ashgillian |
China(Shansi) |
Fu,J. The Ordovician group of micropalaeoflora from Xiliangsi and Jiancaogou Formation of Zhenba Shaanxi. |
1986 |
| details |
Emsian |
Eifelian |
Nd |
Ravn,R.L. et al. Devonian miospores and reworked acritarchs from southeastern Georgia, USA. |
1988 |