Under the tectonic backgrounds of island arc belt, fore - arc trench belt, back - arc basin, and epicontinental active belt of late Paleozoic, it has different volcanic rock characteristics.

在晚古生代岛弧带、弧前海沟带、弧后盆地或陆缘活动带等构造环境下发育有不同的火山岩组合。

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Trench (khaki) twill with black epaulets, belt and cuffs.

海沟(卡其)斜纹黑肩章，腰带和袖口。

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According to the theory of plate tectonics, China's oceanic earthquakes can be divided into three major levels: (1)Western Pacific Ocean arc-trench strong mobile belt;

将中国海洋地震按板块构造理论划分为三个大的层次：（1）西太平洋岛弧-海沟强活动带；

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