| details |
Ludlovian |
|
Indiana |
Wood,G.D. et al. Silurian, (Ludlovian), Plant Megafossils and Trilete spores from northern Indiana and their bearing on Early land plant evolution |
1977 |
| details |
Downtonian |
|
USSR(Estonian SSR) |
Aristova,K.E. et al. Microfossils of stratigraphic type sections from the Upper Silurian of Estonia. |
1976 |
| details |
Ludlovian |
|
Indiana |
Wood,G.D. Acritarchs and Trilete spores from the Mississinewa Shale of northern Indiana. |
1975 |
| details |
Ludlovian |
Downtonian |
Africa(Sahara) |
Richardson,J.B. The stratigraphic utilization of some Silurian and Devonian miospore species in the Northern Hemisphere. |
1974 |
| details |
Ludlovian |
|
England |
Richardson,J.B. The stratigraphic utilization of some Silurian and Devonian miospore species in the Northern Hemisphere. |
1974 |
| details |
Ludlovian |
|
Wales |
Richardson,J.B. The stratigraphic utilization of some Silurian and Devonian miospore species in the Northern Hemisphere. |
1974 |
| details |
Late Wenlockian |
Downtonian |
Libya |
Richardson,J.B. et al. Silurian palynomorphs from the Tanezzuft and Acacus Formations, Tripolitania, North Africa. |
1973 |
| details |
Silurian |
|
Libya |
Richardson,J.B. et al. Silurian palynomorphs from the Tanezzuft and Acacus Formations, Tripolitania, North Africa. |
1973 |
| details |
Wenlockian |
Downtonian |
Libya |
Richardson,J.B. et al. Silurian palynomorphs from the Tanezzuft and Acacus Formations, Tripolitania, North Africa. |
1973 |