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国际地科联(IUGS)已批准国际地层委员会(ICS)前寒武纪地层分会(SPS)关于前寒武纪划分方案(Plumb,1991)的推荐.虽然这个推荐看起来象一个命令(文中“应该”一词使用了不下17次),但它只意味着推荐给国际使用,这个方案有两个既独立又有联系的因素:术语和组成划分界线的数字选择.虽然很高兴地看到这些代的术语是我给前寒武纪地层分会推荐的(在1987年1月21日的信中),但对纪的复杂术语和不等同的界线的最后选择我感到失望.
IUGS has approved the recommendation of the Precambrian Stratigraphic Branch (SPS) of the International Stratigraphy Commission (SPS) on the Precambrian Division Plan (Plumb, 1991). Although this recommendation looks like an order (article The term “should ” was used no less than 17 times), but it only implies recommendations for international use. There are two elements of the program that are independent and interrelated: the choice of terms and the numbers that make up the demarcation line, and although happy to read The term to these generations was the one I recommended to the Precambrian strata (in a January 21, 1987 letter), but I was disappointed with the complex terminology of Ji and the final choice of an unequal boundary.