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[说明]编制地质年表是同位素地质年代学的一项重要内容.第一个比较完整的地质年表是A·霍尔姆斯1947年提出的.二十多年来各国同位素地质工作者不断进行修改和补充.国际地质年代学委员会于1967年推荐了一个年表的初步方案,供各国学者讨论.现将几个具有代表意义的重要年表列在上面.从上列年表看出,虽然所用基点不同,但所得结果很接近,说明目前年表的可信程度.几个年表相差最大的是寒武纪的下.
[Description] The compilation of geological chronology is an important part of isotope geochronology.The first complete geochronology was proposed by A. Holmes in 1947. For more than two decades, isotope geologists in various countries have kept The International Geological Genetics Committee recommended a preliminary plan for the chronology for discussion by scholars from all over the world in 1967. Several important chronologies with representative significance are listed above.From the above chronological table, Although the basic points used are different, the results obtained are very close, indicating the credibility of the current chronology.