| details |
Late Ordovician |
Late Gothlandian |
USSR(Russian Platform) |
Umnova,N.I. Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform. |
1971 |
| details |
Homerian |
|
England(Shropshire) |
Dorning,K.J. et al. The Silurian carbonate shelf microflora- acritarch distribution in the Much Wenlock Limestone Formation. (In: Micropalaeontology of Carbonate Environments. M.B.Hart, editor) |
1987 |
| details |
Homerian |
|
Wales(Montgomeryshire) |
Dorning,K.J. et al. The Silurian carbonate shelf microflora- acritarch distribution in the Much Wenlock Limestone Formation. (In: Micropalaeontology of Carbonate Environments. M.B.Hart, editor) |
1987 |
| details |
Early Precambrian |
|
China(Shansi) |
Yan,Z. Stratigraphical Division and correlation of the Early Precambrian strata in the Lesser Qinling Mountains area |
1985 |
| details |
Carboniferous |
|
USSR(Ukrainian SSR) |
Shkrebta,G.P. et al. New evidence for the exsistance of Late Proterozoic and Lower Paleozoic formations in the Dnieper Donets Depression (DDD). |
1972 |