| 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 | Late Carboniferous | USSR(Urals) | Medvedeva,A.M. Palynological investigation of Petroleum | 1978 | |
| details | Early Visean | USSR(Ukrainian SSR) | Raznitsyn,V.A. Lower Visean of Dnieper-Donets Basin | 1983 |