| details |
Late Kazanian |
|
USSR(Russian Platform) |
Molin,V.A. et al. Upper Permian spore-pollen assemblages of the northern Russian Platform |
1972 |
| details |
Permian |
|
Arctic Ocean |
Dibner,A.F. et al. Carboniferous, Permian and Triassic spore-pollen assemblages of the Barents Sea Shelf and their geological significance. (In: Geology and mineral genesis in Arctic Region USSR. Symposium of Scientific Studies.) |
1981 |
| details |
Late Tatarian |
|
USSR(Urals) |
Tuzhikova,V.I. Miospores and stratigraphy of supporting sections of the Uralian Triassic. (Lower Triassic - Upper Permian Boundary) |
1985 |