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| Arthopods (27) |
| Coal balls (27) |
| Cones (Botany) (27) |
| Conifers, Fossil (27) |
| Cordaites (27) |
| Desmoinian North American Stage (Desmoinesian) (27) |
| Geology, Strategraphic--Carboniferous (27) |
| Geology, Stratigraphic--Pennsylvanian (27) |
| Golden Coprolite (27) |
| Strobilus (27) |