| 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 | Frasnian | Tournaisian | Wales | Richardson,J.B. Devonian spores. (In: Aspects of Palynology. R.H. Tschudy and R.A. Scott, editors) | 1969 |
| details | Late Strunian | Early Visean | Worldwide | Streel,M. Miospore contribution to the Upper Famennian-Strunian event stratigraphy | 1986 |