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