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Author - title
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Year
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| details | Danian | Japan(Hokkaido I.) | Takahashi,K. Palynostratigraphic study of the Kiritappu Formation at Kiritappu and in Yururi Island, eastern Hokkaido | 1991 | |
| details | Maastrichtian | Japan(Hokkaido I.) | Takahashi,K. Palynomorph assemblage of the Tokotan Formation at Konbumori, Nemuro City, Eastern Hokkaido. | 1991 |