| details |
Middle Gedinnian |
|
England(Shropshire) |
Richardson,J.B. Paleozoic spores and pollen: Lower and Middle Palaeozoic record of terrestrial palynomorphs. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |
| original |
Late Vendian |
|
USSR(Leningrad) |
Volkova,N.A. Finds of Pre-Cambrian spores with a Tetrad Scar. (In: Paleontology, Marine Geology. B.S.Sokolov, editor) |
1976 |
| original |
Late Vendian |
|
USSR(Latvian SSR) |
Volkova,N.A. Finds of Pre-Cambrian spores with a Tetrad Scar. (In: Paleontology, Marine Geology. B.S.Sokolov, editor) |
1976 |