本文提出的前寒武计时年表方案是经过国际地质科学联合会(IUGS)美国及墨西哥前寒武工作组对前寒武年表的慎重考虑后提出的。 无论把岩石体归于哪个年表都必须涉及到使用何种公认的程序、术语及分类。在这里我们提出了我们对一些流行的推导年表的原理和方法的选择,以供美国地层命名委员会和一般同行们审查和评论。 The proposed Precambrian chronology program was proposed by the IUGS Pre-Cambrian Working Group of the United States and Mexico before careful consideration of the Precambrian chronology. Regardless of which rock body is attributed to which chronology it must relate to the generally accepted procedures, terminology and classification used. Here we present our selection of some popular principles and methods for deriving chronology for review and comment by the U.S. Stratospheric Nomenclature Committee and other general colleagues.