| details |
Arenigian |
Llandoverian |
Baltic |
Eisenack,A. On the systematics of some Palaeozoic Hystrichospheres (Acritarch) from the Baltic Region. |
1969 |
| details |
Arenigian |
|
Baltic |
Eisenack,A. On the systematics of some Palaeozoic Hystrichospheres (Acritarch) from the Baltic Region. |
1969 |
| details |
Ashgillian |
Llandoverian |
Baltic |
Eisenack,A. On the systematics of some Palaeozoic Hystrichospheres (Acritarch) from the Baltic Region. |
1969 |
| details |
Callovian |
|
Poland |
Eisenack,A. Microfossils of secondary deposits in Dogger from East Prussia. |
1935 |
| details |
Callovian |
|
Poland |
Eisenack,A. Microfossils of secondary deposits in Dogger from East Prussia. |
1935 |
| details |
Cretaceous |
|
USSR(Baltic) |
Wetzel,W. Sediment petrographic studies. 1. Flintstone. |
1922 |
| details |
Cretaceous |
|
USSR(Baltic) |
Wetzel,W. Sediment petrographic studies. 1. Flintstone. |
1922 |
| details |
Cretaceous |
|
USSR(Baltic) |
Wetzel,W. Sediment petrographic studies. 1. Flintstone. |
1922 |
| original |
Cretaceous |
|
USSR(Baltic) |
Wetzel,W. Sediment petrographic studies. 1. Flintstone. |
1922 |
| details |
Cretaceous |
|
USSR(Baltic) |
Wetzel,W. Sediment petrographic studies. 1. Flintstone. |
1922 |
| details |
Cretaceous |
|
USSR(Baltic) |
Wetzel,W. Sediment petrographic studies. 1. Flintstone. |
1922 |
| original |
Cretaceous |
|
USSR(Baltic) |
Wetzel,W. Sediment petrographic studies. 1. Flintstone. |
1922 |
| details |
Dogger |
|
Poland |
Eisenack,A. Eodinia pachytheca, nov.gen., nov.sp., a primative dinoflagellate from a Kelloway Bed of East Prussia. |
1936 |
| details |
Early Ashgillian |
Middle Ashgillian |
Canada(Anticosti Island) |
Jacobson,S.R. et al. Acritarch biostratigraphy of the Dicellograptus complanatus graptolite zone from the Vaureal form Ation, (Ashgillian), Anticosti Island, Quebec, Canada. |
1985 |
| original |
Early Caradocian |
|
Nd |
GŠ³rka,H. Microorganisms of the Ordovician of Poland. |
1969 |
| details |
Early Caradocian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Harnagian |
Onnian |
England(Shropshire) |
Turner,R.E. Acritarchs from the type area of the Ordovician Caradoc Series, Shropshire, England. |
1984 |