(28.3730.424.3960.6107)

开县-开县位于位于长江上游地区、重庆东北部,在三峡库区小江支流回水末端。开县地层发育和地势起伏与四川盆地的地质发展历史密切相关。中生代三迭纪后期发生的印支运动,四川地台受到强烈的挤压,形成地槽型褶皱,出现开-kaixian</br> generated by yvsou girl

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