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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 | Llanvirnian | Llandeilian | Florida | Andress,N.E. et al. Ordovician chitinozoans from Florida Well samples. | 1969 |
| original | Llanvirnian | Caradocian | England(Shropshire) | Jenkins,W.A.M. Ordovician chitinozoa from Shropshire. | 1967 |