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| Arthopods (46) |
| Coal balls (46) |
| Cones (Botany) (46) |
| Conifers, Fossil (46) |
| Cordaites (46) |
| Desmoinian North American Stage (Desmoinesian) (46) |
| Geology, Strategraphic--Carboniferous (46) |
| Geology, Stratigraphic--Pennsylvanian (46) |
| Immature Cone (46) |
| Strobilus (46) |