| NOUN | time | Pennsylvanian period, Pennsylvanian, Upper Carboniferous, Upper Carboniferous period | from 310 million to 280 million years ago |
|---|
| Meaning | From 310 million to 280 million years ago; warm climate; swampy land. | |
|---|---|---|
| Synonyms | Pennsylvanian, Upper Carboniferous, Upper Carboniferous period | |
| Instance of | period, geological period | A unit of geological time during which a system of rocks formed |
| Part of | Carboniferous, Carboniferous period | From 345 million to 280 million years ago |
| Spanish | pennsylvaniense | |
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