| link
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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 | Westphalian B | W.Germany(N.Rhine) | Potonie,R. et al. The genera of Paleozoic sporae dispersae and their stratigraphy. | 1954 | |
| details | Westphalian C | W.Germany(N.Rhine) | Kremp,G.O.W. Spore associations and microfauna horizons in the Carboniferous of the Ruhr. | 1952 |