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Geolocation
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Author - title
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Year
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| details | Visean | Czechoslovakia | KalibovЎ-KaiserovЎ,M. Miospores of the Lower Carboniferous in the Krasna-1 borehole. | 1978 | |
| details | Badenian | Poland | Jachowicz,S. et al. Genesis of hard coal boulders in Sandstones of the Miocene Debowiec Formation | 1987 |