English
Detailed Synonyms for Upper Carboniferous period in English
Upper Carboniferous period:
Upper Carboniferous period [the ~] nom
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the Upper Carboniferous period
– from 310 million to 280 million years ago; warm climate; swampy land 1the Pennsylvanian; the Pennsylvanian period; the Upper Carboniferous; the Upper Carboniferous period– from 310 million to 280 million years ago; warm climate; swampy land 1