晚二叠世末，该地区变成弧后盆地，进一步转化成前陆盆地。
The late Permian it was changed into the back arc basin, and transformed into foreland basin.
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。
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.
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