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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 | Middle Carboniferous | USSR(Ukrainian SSR) | Ishchenko,A.M. Some preliminary results from spore analysis and study of the stratigraphy and paleogeography of the Carboniferous deposits of the USSR. | 1950 | |
| details | Atokan | Oklahoma | Hoffmeister,W.S. Fossil spores and pollen as indicators of Near-Shore environment. | 1950 |