里菲及其在前寒武纪统一地层表中的位置--《国外前寒武纪地质》1978年01期

排行榜 收藏 打印 发给朋友 举报 来源: 《地质调查与研究》 发布者:cjk3d
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【摘要】:正 建立前寒武纪统一地层表是一项非常急迫的任务,只有当同位素年令测定方法出现以后,结合生物地层法才开始对前寒武纪地层进行划分对比,对不同构造岩相带的地层剖面进行全球性的对比。不久前,K.兰卡玛提出的建立全球性的统一地层表的方案是一项非常重要的倡议。到目前为止,建立前寒武纪统一地层表大致提出了三种方法:①标准剖面法:划分地层及其相应的地质年代时,应有一个标准层型剖面作为对比的依据,这一标准的层

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建立前寒武纪统一地层表是一项非常急迫的任务,只有当同位素年令测定方法出现以后,结合生物地层法才开始对前寒武纪地层进行划分对比,对不同构造岩相带的地层剖面进行全球性的对比。不久前,K.兰卡玛提出的建立全球性的统一地层表的方了案是一项非常重要的倡议。 到目前为止,

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