| 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 | Artinskian | Canada(NWT,Franklin) | Barss,M.S. Carboniferous and Permian spores of Canada. | 1967 | |
| details | Permian | USSR(European) | Hart,G.F. The systematics and distribution of Permian miospores. | 1965 |