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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 Givetian | Grahn,Y. et al. Middle and Upper Devonian Chitinozoan biostratigraphy of the Parana Basin in Brazil and Paraguay. | 2002 | ||
| details | Early Givetian | Paraguay | Grahn,Y. et al. Middle and Upper Devonian Chitinozoan biostratigraphy of the Parana Basin in Brazil and Paraguay. | 2002 | |
| details | Caradocian | Scotland(Dumfries) | Zalasiewicz,J. et al. Submission of Hartfell Score (south Scotland) as a GSSP for the base of the middle stage of the Upper Ordovician Series. | 2004 |