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河北唐山开平一带的晚寒武世地层,孙云铸(1923,1924,1935)曾系统研究过,卢衍豪(1962)在总结中国寒武系又加以综合和补充。这个地区出露的长山组和凤山组是我国上寒武统中、上部的标准,通用于我国寒武纪地层表上。但是,孙云铸在长山沟的长山组剖面掩盖甚多,上下关系不明,加之时间长,人工采石,剖面已很难找到;而在凤山的凤山组剖面,露头欠佳,厚度不详,还有构造关系,也难以测制剖面。1980—1981年,我们选择了距凤山东约1公里的巍山测制了上寒武统崮山组、长山组和凤山组的剖面,做为长山组
Late Cambrian strata in the Kaiping area of Tangshan, Hebei Province, were systematically studied by Sun Yunzhu (1923, 1924, 1935), and Lu Yanhao (1962) summarized and supplemented the Cambrian of China. The Changshan Formation and Fengshan Formation exposed in this area are the upper and middle parts of the Upper Cambrian in our country and are commonly used in the Cambrian stratigraphy table of our country. However, Sun Yunzhu has a lot of cover in the Changshan Formation section of Changshangou, and the unknown relationship between the upper and lower layers. In addition, it has been very hard to find the section with a long time and artificial quarrying. However, in the section of Fengshan Formation in Fengshan Mountain, There are structural relations, it is difficult to test the profile. From 1980 to 1981, we selected Weishan, about 1 km away from Fengshan, to survey the profiles of the Upper Cambrian Dangshan Formation, Changshan Formation and Fengshan Formation.