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
庄户洼河床剖面上部( 图3 -P)的大型地裂缝