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Geolocation
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Author - title
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Year
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| details | Middle Arenigian | Argentina(Salta) | Vergel,M.D.M. et al. Ordovician palynomorphs of Argentina: An integrated approach. (Aspects of the Ordovician System in Argentina.) | 2002 | |
| details | Arenigian | Germany(Saxony) | Marek,J. et al. Revision of trilobites of the Griffelschiefer Formation (Ordovician, Schwarzburg anticline, Germany): preliminary results | 2003 |