| details |
Riphean |
|
USSR(Siberia) |
Veis,A.F. Riphean and Vendian microfossils of the Ushur-Maya and Turukhan Regions of Siberia |
1988 |
| details |
Late Riphean |
|
USSR(Siberia) |
German,T.N. et al. Systematic descriptions of microfossils. (In: Precambrian Microfossils of the USSR. T.V.Yankauskas, editor) |
1989 |
| details |
Precambriam |
|
USSR |
Golovenok,V.K. Precambrian microfossils in chert and their biostratigraphic significance. |
1989 |
| details |
Late Riphean |
|
USSR(Siberia) |
Vidal,G. et al. Patterns of phytoplankton radiation across the Precambrian-Cambrian boundary. |
1992 |