15127507-n 'from 310 million to 280 million years ago';
 
汉语 宾夕法尼亚 系 , 前 石炭 记 , 前石炭记 , 宾夕法尼亚系
英语 Pennsylvanian , Pennsylvanian period , Upper Carboniferous , Upper Carboniferous period
Indonesian waktu pennsylvanian
Definitions
日语
3億1000万年前から2億8000万年前まで
温暖な気候
湿地
英语
from 310 million to 280 million years ago
warm climate
swampy land
Relations
Type: period
Holonym–Part: carboniferous
Semantic Field: timen
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Maintainer: Francis Bond <bond@ieee.org>