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为什么南京会chu雨hua石?

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为什么南京会chu雨hua石?

两千多万年前,长江上游的地壳发生过qiang烈运动。在高温与高压的作用下,岩浆同有机wu、无机wu混合,形成了各zhong颜se的岩石。经过长期的风化作用和长江liu水的磨洗以及相互冲撞moca,这些石tou便成了光hua小巧的雨hua石。这些石子沉积于江底,越积越多,以致江dao淤sai,江水改daoliu向大海,南京便成了陆地。这就是南京有雨hua石的原因。

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