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Geolocation
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Author - title
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Year
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| details | Middle Ordovician | Sweden | Kjellstrжm,G. Middle Ordovician microplankton from the Grotlingbo borehole No.1 in Gotland, Sweden. | 1971 | |
| original | Llanvirnian | Early Caradocian | France(Finistere) | Henry,J.L. Micro-organisms incertae sedis (acritarchs and chitinozoans) of the Ordovician of the Crozon Peninsula (Finistere). Beds of Mort-Anglaise and Kerglintin. | 1969 |