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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 | Siegenian | Middle Emsian | Poland | Turnau,E. et al. Early Devonian miospores and age of the Zwolen Formation (Old Red Sandstone Facies) from Ciepielow IG-1 Borehole. | 1989 |
| details | Siegenian | Wales | Edwards,D. A new plant from the Lower Old Red Sandstone of south Wales. | 1968 |