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Geolocation
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Author - title
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Year
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| details | Ludlovian | Eifelian | Czechoslovakia(Slovensko) | Planderova,E. et al. Stratigraphic position of carbonate formations in Crystalline Complexes of Tatricum and Veporicum. (In: Sedimentological problem of the Western Carpathians.50 years of teaching geology and paleontology in Slovakia. M.Sykora et al, editors) | 1990 |
| details | Wenlockian | Sweden(Gotland) | Jeppson,L. et al. Wenlock (Silurian) oceanic episodes and events. | 1995 | |
| details | Gorstian | Sweden(Gotland) | Stricanne,L. et al. Acritarch distribution along an inshore-offshore transect in the Gorstian (lower Ludlow) of Gotland, Sweden | 2004 |