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Geolocation
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Author - title
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Year
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| details | Middle Tournaisian | Late Tournaisian | Belgium | Higgs,K.T. Taxonomy and systematic study of some Tournasian (Hastarian) spores from Belgium | 1996 |
| details | Tournaisian | USSR(Belorussian SSR) | Higgs,K.T. Taxonomy and systematic study of some Tournasian (Hastarian) spores from Belgium | 1996 |