三叠纪末或早侏罗世初，开阔的谷底沉积了山间河流相的杏石口组。

At the end of the Triassic or at the beginning of the Early Jurassic, the intermontane fluvial Xingshikou Formation was deposited on the bottom of the open valley.

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三叠纪末或早侏罗世初，开阔的谷底沉积了山间河流相的杏石口组。

At the end of the Triassic or at the beginning of the Early Jurassic, the intermontane fluvial Xingshikou Formation was deposited on the bottom of the open valley.

youdao