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本文为前寒武系一寒武系界限工作组自1972年至1981年国际地质对比计划(IGCP)项目第29项的工作小结。关于作者意见中的界限位置于1981年一季度已得出轮廓。所附两图示全球范围内该项目研究的区域以及选定的关键剖面内前寒武系一寒武系界限位置所考虑到的暂时结论。这方面在巴黎(1974)和剑桥(1978)工作组会议中也有了大体轮廓。最后,文中讨抡了古杯纲化石带、托马特(Tommotian)小壳化石、遗迹化石和三叶虫的地层价值,并注意到今后几年内应继续考虑下述主要问题: (1)全球界限剖面和界限点的位置和有代表性的地区,可能在亚洲。 (2)洲际对比。 (3)古生物学研究。
This article is a summary of the work done by the Precambrian Cambrian Boundary Working Group on Item 29 of the International Geological Correlation Program (IGCP) from 1972 to 1981. The boundary position in the author’s opinion was outlined in the first quarter of 1981. The attached two show the tentative conclusions taken into consideration for the area studied by the project globally and the Precambrian-Cambrian boundary locations within the selected key sections. This area also has a general outline in the meetings of the working groups in Paris (1974) and Cambridge (1978). Finally, the text discusses the stratigraphic value of paleobadal fossils, Tommotian small fossils, trace fossils and trilobites and notes that the following major issues should continue to be considered in the next few years: (1) global The location of the cut-off point and the boundary point and a representative area may be in Asia. (2) Intercontinental comparison. (3) Paleontology research.