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| Coal balls (151) |
| Cones (Botany) (151) |
| Conifers, Fossil (151) |
| Desmoinian North American Stage (Desmoinesian) (151) |
| Geology, Strategraphic--Carboniferous (151) |
| Geology, Stratigraphic--Pennsylvanian (151) |
| Cordaites (146) |
| Arthopods (145) |
| Strobilus (145) |
| Coal Ball Peels (139) |