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
雾迷山组中硅化层的变形与液化充填(庄户洼河床剖面以北200 m) （①—硅化层受挤压形成褶皱;②—与上下另两层硅化层互相贯通）