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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 | Llandoverian | Argentina(San Juan) | Rubinstein,C.V. Palynological investigations in the Lower Paleozoic of Argentina | 1993 | |
| details | Llandeilian | Caradocian | Algeria | Oulebsir,L. et al. Ordovician chitinozoa from Algeria: Biostratigraphy and paleogeography | 1995 |