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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 | Nd | Nd | Eisenack,A. Contribution to acritarch research. | 1974 | |
| details | Oligocene | Mississippi | Eisenack,A. et al. Catalog of fossil dinoflagellates, hystrichospheres and related microfossils. Acritarchs. | 1973 | |
| details | Miocene | Texas | Ebtehadj,K. Palynology of the subsurface Frio Formation, in Liberty and Chambers Counties, Texas. | 1969 | |
| original | Oligocene | Mississippi | Drugg,W.S. et al. Some Eocene and Oligocene phytoplankton from the Gulf Coast, USA | 1967 |