From 310 million to 280 million years ago; warm climate; swampy land. Synonyms: Pennsylvanian period, Upper Carboniferous, Upper Carboniferous period.
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"Pennsylvanian" Quotes from Famous Books — A Residence in France - With An Excursion Up The Rhine, And A Second Visit To Switzerland • J. Fenimore Cooper |
Words linked to "Pennsylvanian" : Keystone Stater, geological period, Carboniferous period, Pennsylvanian period, American, period, carboniferous |
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