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云南晋宁梅树村、王家湾筇竹寺组八道湾段黑色页岩是接近于目前所定前寒武系-寒武系界线位置的一套地层,其年龄值对最终确定前寒武系-寒武系界线年龄有重要意义。近年来,国内外对前寒武系-寒武系界线年龄的时限看法各异,但总的趋势是认为前寒武系-寒武系界线年龄应比570百万年为大。1978年国际地科联前寒武系-寒武系界线工作组组长考依博士曾提出界线年龄为600百万年的意见,1977—1979年云南省地质科学研究所与宜昌地质矿产研
Meishu Village, Jinning, Yunnan Province, and the black shale at Badaowan Section of Qiongzhusi Formation in Wangjiawan are a set of strata close to the present Precambrian-Cambrian boundary line. The age value of the black shale is consistent with that of the Precambrian - Cambrian boundary line age is of great significance. In recent years, there are different views on the time limits of the Precambrian-Cambrian boundary at home and abroad, but the general trend is that the Precambrian-Cambrian boundary line should be larger than 570 million years. In 1978, the International Union of Prehistoric Cambodian-Cambrian Boundary Line Working Group, Dr. Kao Yi had put forward the line of age of 600 million years of opinion, 1977-1979 Yunnan Institute of Geology and Yichang Institute of Geology and Mineral Resources