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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 | Late Ludlovian | Early Lochkovian | Brazil(Amazonas) | Grahn,Y. et al. Age and correlation of the Trombetas Group, Amazonas Basin, Brazil. | 1992 |
| details | Silurian | Czechoslovakia | Grahn,Y. et al. Age and correlation of the Trombetas Group, Amazonas Basin, Brazil. | 1992 |