Permian period

同根派生

At the end of the Permian period 225m years ago, between 80 % and 96 % of all living marine species were extinguished.
2.;25亿年前的二叠纪末期，当时80%25到96%25的海洋物种灭绝；
Any of various large, segmented aquatic arthropods of the order Eurypterida that existed from the Ordovician Period to the Permian Period.
（古生）板足鲎目的一种巨大的、有节的，属于板足鲎目的水生节肢动物，生存于奥陶纪到二叠纪时期
At the end of the Permian period the earth's landmasses were configured into one supercontinent, Pangea, and a superocean, Panthalassa.
二叠纪末期，地球上的陆地合并成一块超级大洲，叫作盘古大陆，以及一个超级大海，叫作原始大洋。
Ore deposits which have economical value mainly are depositional type and volcanegenic type produced in the permian period and tertiary period.
具经济价值的主要为产于二叠纪及第三纪沉积类及火山沉积类矿床。
The hydrothermal fluid and the spaces of ore-bodies in the deposit are provided by the granite magmas and the Permian period.
指出印支期白岗质花岗岩岩浆提供部分成矿物质,二叠系地层和花岗岩浸位提供热源和导矿、容矿空间。