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Geolocation
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Author - title
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Year
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| original | Middle Eocene | Late Eocene | Canada(British Columbia) | Rouse,G.E. Plant microfossils from the Burrard Formation of Western British Columbia. | 1962 |
| original | Middle Miocene | Massachusetts | Frederiksen,N.O. Stratigraphic, paleoclimatic and paleobiogeographic significance of Tertiary sporomorphs from Massachusetts | 1984 |