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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 | Middle Oligocene | W.Germany(N.Rhine) | Benedek,P.N. Phytoplanktons from the Middle and Upper Oligocene of Tonisberg, (Lower Rhine area). | 1972 | |
| details | Rupelian | Chattian | W.Germany(N.Rhine) | Benedek,P.N. et al. Nannoplankton-phytoplankton correlation from the Middle and Upper Oligocene of northwest Germany. | 1974 |
| details | Early Oligocene | Middle Oligocene | W.Germany(N.Rhine) | Benedek,P.N. et al. The Lower/Middle Oligocene boundary at Doberg near Bunde/Westfalen.1.Phyto and Nannoplankton. | 1976 |