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Geolocation
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Author - title
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Year
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| original | Early Oligocene | USSR(WSL) | Ushakova,M.V. et al. Lower Oligocene. (In: Stratigraphy of the Mesozoic and Cenozoic of the Western Siberian Lowlands. V.F.Kozyreva, editor) | 1957 | |
| details | Reuverian | Germany | Rein,U. Pleistocene pollen stratigraphy in Northwest Germany.1.Pollen stratigraphy of the Lower Pleistocene. | 1955 |