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| Arthopods (116) |
| Coal balls (116) |
| Cones (Botany) (116) |
| Conifers, Fossil (116) |
| Cordaites (116) |
| Desmoinian North American Stage (Desmoinesian) (116) |
| Geology, Strategraphic--Carboniferous (116) |
| Geology, Stratigraphic--Pennsylvanian (116) |
| Strobilus (116) |
| Coal Ball Peels (104) |