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Geolocation
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Author - title
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Year
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| details | Late Oligocene | Miocene | Germany(Brandenburg) | Thiergart,F. Pollen flora of Brown Coal from the Niederlausitz, especially from the Marga Mine near Senftenberg | 1938 |
| details | Miocene | W.Germany(N.Rhine) | Potonie,R. et al. Microbotany of Miocene Brown Coal from the Niederrheinische Bucht | 1934 | |
| original | Miocene | W.Germany(Rhineland) | Potonie,R. Pollen forms of the Miocene Brown Coal. | 1931 |