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geological period vs Pennsylvanian period

Pennsylvanian period vs geological period

geological period and Pennsylvanian period both are nouns.

Word NounAdjectiveVerbAdverb
geological period Yes No No No
Pennsylvanian period Yes No No No
geological period (noun) Pennsylvanian period (noun)
a unit of geological time during which a system of rocks formed the period from 310 million to 280 million years ago; characterized by warm climate and swampy land
Difference between geological period and Pennsylvanian period

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