Afterward, global large-scale massive volcanic activity in Permian Period generally brought about metamorphism whole middle Cambrian Period volcanic sediment rock in research area.
二叠纪全球性大规模火山活动，致使区内整个中寒武纪的火山沉积岩普遍发生变质。
Afterward, global large-scale massive volcanic activity in Permian Period generally brought about metamorphism whole middle Cambrian Period volcanic sediment rock in research area.
二叠纪全球性大规模火山活动，致使区内整个中寒武纪的火山沉积岩普遍发生变质。
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