| 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 | Late Pottsville | Allegheny | Kentucky | Cross,A.T. Spore floras of the Pennsylvanian of West Virginia and Kentucky | 1947 |
| details | Pennsylvanian | Poland | Schopf,J.M. et al. An annotated synopsis of Paleozoic fossil spores and the definition of generic groups. | 1944 |