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From
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Geolocation
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Author - title
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Year
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| details | Triassic | USSR(Yakut ASSR) | Skripina,G.F. Triassic spore-pollen assemblages of Middle Vilyuusk gas-containing deposits. (In: Palynological characteristics of the Paleozoic, Mesozoic and Cenozoic deposits of Vakutia. A.I.Tomskayiya and V.F.Vozin, editors) | 1971 | |
| details | Middle Ordovician | USSR(Yaroslav) | Zharkova,M.F. et al. Age of the Yaroslavl' Series in the Lyubim District | 1967 |