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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 | Early Tremadocian | Belgium | Martin,F. The acritarchs from the Belgian Ordovician and Silurian. Determination and stratigraphic value. | 1968 | |
| details | Early Ordovician | Poland | Timofeev,B.V. Micropaleophytological research into ancient strata. | 1966 | |
| details | Cambrian | Belgium | Martin,F. The acritarchs from the Belgian Ordovician and Silurian. Determination and stratigraphic value. | 1968 |