This eventually resulted in the oxygen-rich atmosphere of the Carboniferous period around 340 to 280 million years ago.
这导致在距今2.8到3.4亿年前的石炭纪大气中的氧气几近饱和。
The new research is focused on the Carboniferous Period, when the supercontinent of Pangea was covered in tropical rainforests ruled by reptiles.
在30亿年前的石炭纪时代，大陆被热带雨林覆盖，并由爬行动物所统治。
The Middle Carboniferous period was a main age that the Yilian-habirga crest zone was put together with the Wenquan-Sailimu and the Boluokenu tectonic belts.
中石炭世是准噶尔地块西南缘伊林哈比尔尕波峰带与温泉-赛里木及婆罗科努构造带镶嵌的主要时期。
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