| details |
Sinian |
|
USSR(Krasnoyarsk Kray) |
Alushinskii,Yu.A. et al. Spores from Sinian deposits of the Enissey Ridge |
1957 |
| original |
Vendian |
Cambrian |
W.Germany(Niedersachsen) |
Timofeev,B.V. The age of a graywache from Lower Saxony. Micropaleontological investigation of samples from the Graywacke of Weesensteiner and Lausitzer. |
1958 |
| details |
Sinian |
|
USSR(Siberia) |
Demokidov,K.K. Stratigraphy of Late Precambrian (Sinian) and Cambrian deposits of the USSR Arctic. (In: Stratigraphy of Precambrian and Cambrian deposits) |
1961 |
| details |
Nd |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Ordovician |
|
Nd |
Servais,T. An annotated bibliographical review of Ordovician acritarchs |
1997 |