15247518-n 'a unit of geological time during which a system of rocks formed';
 
汉语 时代 , 地质时代 , 地质 时代 ,
英语 period , geological period
Indonesian jangka masa , periode geologi , tempoh waktu , zaman , usia
日语
Definitions
英语
a unit of geological time during which a system of rocks formed
ganoid fishes swarmed during the earlier geological periods
日语
岩の体系ができた地質学的時間の単位
硬鱗類の魚は地質時代の早い時期に群がっていた
Relations
Hyponym: ice_age
Hypernym: geological_time
Instance: cretaceous jurassic triassic quaternary carboniferous permian silurian tertiary pennsylvanian devonian cambrian ordovician mississippian
Meronym–Part: epoch
Holonym–Part: era
Semantic Field: timen
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