北京永定河谷中元古界雾迷山组软沉积物变形与古地震发生频率
苏德辰1,2, 孙爱萍1,2

Soft-sediment deformation and occurrence frequency of palaeoearthquake in the Mesoproterozoic Wumishan Formation,Yongding River Valley,Beijing
Su Dechen1,2, Sun Aiping1,2
庄户洼河床剖面下部( 图3 -B)硅化层的挤入构造及其附近的软沉积物变形构造(镜头向西,注意图中硅结壳层2的顶底面呈波状起伏并含有较多的白云岩角砾;变形5(紧密褶皱)和6(褶皱—板刺状角砾)表明该层遭受挤压应力;1和3为硅化白云岩层的挤入构造)