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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 | Late Cambrian | Argentina | Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary | 1997 | |
| details | Late Cambrian | China(Kirin) | Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary | 1997 | |
| details | Ordovician | Nd | Servais,T. An annotated bibliographical review of Ordovician acritarchs | 1997 |