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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 | Middle Cambrian | Early Tremadocian | Spain | Fombella,M.A. Palynology of the Oville Formation, north and south Cantabrian Mountains. | 1978 |
| details | Middle Cambrian | Poland | Yankauskas,T.V. et al. Lower and Middle Cambrian acritarch-based biozonation of the Baltic Syneclise and adjacent area (East European Platform). | 1992 |