| link
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From
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To
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Geolocation
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Author - title
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Year
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| details | Middle Visean | Namurian B | USSR(Ukrainian SSR) | Teteryuk,V.K. Stratigraphic separation of Lower Carboniferous deposits of the western part of the Donbas by spores and pollen | 1960 |
| details | Westphalian B | Westphalian D | USSR(Rostov) | Egorov,A.I. et al. Spores and pollen of Middle Carboniferous deposits of the Don Basin. | 1971 |