In the ocean basin spreading stage of Middle Silurian, it formed a increase metamorphic charateristics with lotrite facies→low green schist facies→hornblende facies.
中志留世末洋盆扩张阶段，形成葡萄
、
相→低片岩相→角闪岩相的递增变
特征；
In the ocean basin spreading stage of Middle Silurian, it formed a increase metamorphic charateristics with lotrite facies→low green schist facies→hornblende facies.
中志留世末洋盆扩张阶段，形成葡萄、相→低片岩相→角闪岩相的递增变特征；
7.In the ocean basin spreading stage of Middle Silurian,it formed a increase metamorphic charateristics with lotrite facies→low green schist facies→hornblende facies.
中志留世末洋盆扩张阶段 ,形成葡萄、相→低片岩相→角闪岩相的递增变特征 ;
：
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