Therefore the volcanic rocks in Chahe and Maomihe belong to the continental arc environment.
上述特征充分说明岔河、茂密河的火山岩属大陆弧构造环境。
Their structural environment is mainly volcanic arc.
其构造环境主要为火山弧地区。
They were formed in an island-arc environment of moderate maturity, and the volcanic rocks present in Dongshuixia area might have been formed in an intra-arc rift.
火山岩形成于具有中等成熟度的岛弧环境，其中发育于东水峡的火山岩可能形成于弧内裂谷环境。
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