其外来系统主要由泥盆系、二叠系、三叠系及元古代岩体组成，构成飞来峰群。
The Allochthon consists mainly of Devonian, Permian, Triassic and Protero-zoic rocks which constitutes a klippe group.
二叠纪时，二块体的空间位置及其配置关系已与现状接近。
In the Permian period, the space relationship and distribution of them had been similar to that of the present one.
研究表明，从二叠纪到侏罗纪构造活动逐渐减弱，扇体规模逐渐变小；
Tectonic activities attenuated gradually from Permian to Jurassic and the sizes of fans decreased gradually.
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