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Geolocation
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Author - title
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Year
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| details | Early Eocene | USSR(Ukrainian SSR) | Gruzman,G.G. et al. New data on the composition and structure of the Cenozoic, (Pre-Quaternary) deposits in Southern Polesye. | 1974 | |
| details | Early Ypresian | Belgium | De Coninck,J. Organic walled microfossils of the Lower Ypresian of Quenast. | 1986 |