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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 | Early Tertiary | Japan(Hokkaido I.) | Tokunaga,S. Pollen analyses of some coal seams in the Akabira area, Ishikari Coal Field, Hokkaido | 1956 | |
| details | Miocene | W.Germany(N.Rhine) | Thomson,P.W. et al. On the fine stratigraphic investigation of the Brown Coal Seams. | 1952 | |
| details | Oligocene | Miocene | W.Germany(Rhineland) | Thomson,P.W. The stratigraphic significance of the sporomorphs. | 1952 |