| link
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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 Oligocene | Russia(Caucasus) | Zaporozhets,N.I. Lower Oligocene palynology and phytoplankton of the northern Caucasus | 1993 | |
| details | Pliocene | China(Kansu) | Zhai,Y. et al. The Tertiary System of Gansu Province. | 1984 |