| details |
Late Proterozoic |
Early Cambrian |
USSR(Siberia) |
Timofeev,B.V. Spores of Proterozoic and Early Paleozoic deposits of eastern Siberia and their stratigraphic significance |
1956 |
| details |
Early Cambrian |
|
USSR(Yakut ASSR) |
Timofeev,B.V. Stratigraphy, palaeontological characteristics and sectional comparison of Sinian and Cambrian deposits of the northeastern slopes of the Aldansk and the Southern Slopes of the Anabarsk Shields. (In: Material on the geology and petroleum of Yakut ASSR) |
1959 |
| details |
Proterozoic |
Middle Cambrian |
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |