前寒武纪全球地质年代划分新趋势New trends in the rock-based subdivision of the Precambrian timescale
朱茂炎
摘要(Abstract)：
<正>前寒武纪(pre-Cambrian,Precambrian)是一个非正式的地质年代单位,泛指寒武纪之前的地质时代,在地质科学研究和实践中被广泛使用。约占地球历史88%时长的前寒武纪岩石和地层经过长时间各种地质作用改造,不仅记录不完整、保存差,而且原始地层层序复杂不清。同时,前寒武纪没有像显生宙那样可以用于地层划分和对比的标准生物化石,因而前寒武纪地层研究和地质年代划分与对比非常困难。国际地层委员会(ICS)作为国际地质科学联合会(IUGS,以下简称地科联)下属最大的国际学术组织,
关键词(KeyWords)：
基金项目(Foundation):
作者(Author): 朱茂炎
DOI: 10.19839/j.cnki.dcxzz.2022.0018
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