Shanxian County is located in the hinterland of Qinling Yumai XIaoshan -Sanmenxia Basin,the area of tectonic position in the Qinling structural belt and the north-east part of the extension of Taihang Mountains and South composite reverse extension of new Huaxia uplift,middle and north of what Professor LiSiguang called "Xiaoshan arc"east and West tectonic systems contrals strata as land-based sources of debris and coastal seimentary intersection construction.

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