1978年11月,国际地质科学联合会(IUGS)所属国际地质对比计划(IGCP)第29号项目(国际前寒武系——寒武系界线)的工作组首次访华期间,云南昆明地区的梅树村剖面及王家湾剖面、四川峨眉的高桥剖面、湖北峡东区的天柱山剖面及松树坡剖面,被该工作组选作为参考剖面。1982年11月6—8日,由中国国际地质对比计划全国委员会、中国地质学会和国际地质对比计划第29号项目工作组联合发起的《国际前寒武系——寒武系界线问题现场讨论会》在昆 In November 1978, during the first visit to China by the Working Group on International Geological Correlation Program (IGCP) Project No. 29 (the International Precambrian-Cambrian Boundary Line) to which the International Union of Geological Sciences (IUGS) belongs, Meishu Cun section and Wangjiawan section, Takahashi section of Emei in Sichuan, Tianzhu section and Songshupiao section in Xiaodong area of ​​Hubei Province were chosen as the reference sections by the working group. From November 6 to November 8, 1982, an on-site discussion on the international Precambrian-Cambrian boundary line was jointly launched by the China National Committee for International Geological Contrast Program, the Chinese Geological Society and the International Geological Correction Project No. 29 Project Working Group Will be "in kun