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Geolocation
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Author - title
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Year
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| details | Late Gothlandian | USSR(Estonian SSR) | Aristova,K.E. et al. Microfossils of stratigraphic type sections from the Upper Silurian of Estonia. | 1976 | |
| details | Ludlovian | USSR(Estonian SSR) | Aristova,K.E. et al. Microfossils of stratigraphic type sections from the Upper Silurian of Estonia. | 1976 | |
| details | Downtonian | USSR(Estonian SSR) | Aristova,K.E. et al. Microfossils of stratigraphic type sections from the Upper Silurian of Estonia. | 1976 |