| 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 | Oligocene | Miocene | Alaska(Bering Sea) | Matsuoka,K. et al. Cenozoic dinoflagellate cysts from the Navarin Basin, Norton Sound and St.George Basin, Bering Sea. | 1988 |
| details | Late Eocene | Early Oligocene | Alaska | McLean,H. et al. Paleogene geology and chronology of southwestern Umnak Island, Aleutian Islands, Alaska. | 1984 |