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Geolocation
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Author - title
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Year
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| details | Wenlockian | Indiana | Wood,G.D. Acritarchs, spores, and plant detritus from the Silurian, (Wenlockian) Waldron Shale of southeastern Indiana. | 1978 | |
| details | Westphalian A | Autunian | France(Vosges) | Doubinger,J. On the age of Coal bearing strata of the Vosges. | 1965 |