late devonian-early permian 晚泥盆世早二
late Early Permian 早二叠世晚期
late early permian angara 早二叠世晚期
early stage of late permian 晚二叠世早期
early period of late permian 晚二叠世早期
Late Permian-Early Triassic 晚二叠世
late carboniferous-early permian 晚石炭世早二叠
late carboniferous early permian 晚石炭世早二叠世
The age of Kalagang formation of late Carboniferous was early Permian.
其时代为晚石炭世至早二叠世。
The action must also have played an important role in the mass extinction during the Late Permian and early Triassic.
研究二叠纪末一三叠纪初生物大绝灭事件具有重要作用；
On the basis of the study on the flora characteristic of the late late Carboniferous and early early Permian in the Helan Mountains, the palaeoecology study on this flora has been analyzed.
在综合研究了贺兰山北段晚石炭世晚期和早二叠世早期植物群的特征和性质的基础上，对此植物群进行了古生态学方面的分析研究。
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