河南的罗圈组被认为是冰碛层以来,许多同志对华北南部及西南部寒武纪及晚前寒武纪地层划分、对比等问题比较重视,不少同志发表了文章,提出了一些看法。这对我国南北寒武纪及晚前寒武纪地层对比甚为重要。 1976年8—9月卢衍豪、袁克兴,袁金良在宁夏贺兰山苏峪口及山西南部中条山观察寒武纪底部的地层。同年9—10月张文堂、林焕令、伍鸿基、袁金良在山西芮城中条山水峪 Since the Luozupan in Henan was considered to be a moraine layer, many comrades paid more attention to the division and contrast of the Cambrian and Late Precambrian strata in southern and southern North China. Many comrades published articles and put forward some views. This is very important for the comparison of Cambrian and Late Precambrian strata in our country. From August to September 1976, Lu Yanhao, Yuan Kexing, and Yuan Jinliang observed the formations at the bottom of Cambrian in the Suyukou Helan Mountain, Ningxia and in Zhongtiaoshan, southern Shanxi. In September-October of the same year, Zhang Wintang, Lin Huanling, Wu Hongji, Yuan Jinliang in Shanxi Ruicheng Zhongti Valley