他在前寒武纪地层研究的贡献是：①发现和命名蓟县运动，正确解决了华北震旦系与寒武系的分界问题；
His contributions to the study of Precambrian strata are : first discovering and naming Jixian Movement , Properly solving the problem of divide between Sinian System and Cambrian System ;
蓟县运动