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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 Namurian A | United Kingdom | Butterworth,M.A. et al. Microspore distribution in the coalfields of Britain | 1960 | |
| details | Early Westphalian A | Stephanian | United Kingdom | Butterworth,M.A. et al. Microspore distribution in the coalfields of Britain | 1960 |
| details | Early Westphalian D | Germany(Rhineland) | Bharadwaj,D.C. The spore flora of Velener Schichten (Lower Westphalian D) in the Ruhr Coal Measures. | 1957 |