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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 B | Westphalian D | Spain | Dijkstra,S.J. Spanish Carboniferous megaspores and their use in stratigraphic correlation. | 1955 |
| details | Namurian | Westphalian D | Poland | Dijkstra,S.J. The stratigraphical value of megaspores | 1952 |