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Geolocation
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Author - title
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Year
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| details | Middle Oligocene | Germany | Frederiksen,N.O. Middle Eocene palynomorphs from San Diego, California. Part II: Angiosperm pollen and miscellanea. | 1983 | |
| original | Middle Oligocene | Germany | Krutzsch,W. Stratigraphic or botanic importance of new spore and pollen forms from the German Tertiary. | 1962 |