| 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 B | Netherlands | Dijkstra,S.J. Correlation of Coal Seams by megaspores | 1955 | |
| details | Carboniferous | Michigan | Ishchenko,A.M. et al. Megaspores of the Carboniferous age and their stratigraphic importance | 1962 |