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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 A | Westphalian B | Michigan | Braman,D.R. et al. The stratigraphic and geographic distribution of Carboniferous megaspores. | 1980 |
| details | Westphalian A | England(Gloucestershire) | Spinner,E. The occurrence and distribution of megaspores in Drybrook Sandstone and associated Measures of the Forest of Dean Basin, Gloucestershire, England | 1984 |