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Author - title
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| details | Early Oligocene | Russia(Caucasus) | Krasheninnikov,V.A. et al. Reference sections of the Eocene - Oligocene boundary strata on the territory of the former Soviet Union. The Kuban River section (Northern Caucasus, Russia). (In: Late Eocene-Early Oligocene geological and Biotical events on the Territory of the Former Soviet Union.Part 2: The Regional Geology of the Upper Eocene and Lower Oligocene. (V.A.Krasheninnikov and A.Akhmetiev, editors) | 1996 | |
| details | Late Paleocene | Early Eocene | Atlantic Ocean | Boulter,M.C. et al. The Brito-Arctic Igneous Province flora around the Paleocene/Eocene boundary | 1989 |