| 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 | Westphalian D | Bulgaria | Latcheva,J. et al. Two important palynological correlation markers in the Westphalian of Dobrudza Coal Basin | 1984 | |
| details | Namurian | China(Kansu) | Zhu,H. A revised palynological Sub-Division of the Namurian of Jingyuan, Northwest China | 1993 |