| details |
Riphean |
|
USSR(Urals) |
Yankauskas,T.V. Vegetative microfossils of Tiphean deposits from Southern Urals. |
1978 |
| details |
|
|
USSR(Urals) |
Keller,B.M. Riddles of the Precambrian |
1979 |
| details |
Late Precambrian |
|
Finland |
Tynni,R. et al. A microfossil and sedimentation study of the Late Precambrian formation of Hailuoto, Finland. |
1980 |
| details |
Late Riphean |
|
Russia(Urals) |
Mikhailova,N.S. et al. New data on the organic-walled microfossils of the Upper Precambrian of the Urals |
1992 |
| details |
Early Proterozoic |
|
Canada(Arctic) |
Butterfield,N.J. et al. Diverse organic-walled fossils, including "possible dinoflagellate", from the Early Neoproterozoic of Arctic Canada. |
1998 |
| details |
Middle Proterozoic |
Late Proterozoic |
Greenland |
Samuelsson,J. et al. Organic-walled microfossils from the Proterozoic Thule Supergroup, northwest Greenland. |
1999 |