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precambrian中文是什么意思

  • adj.
    【地质学;地理学】前寒武纪的。
    n.
    〔the Precambrian 〕 前寒武纪。

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  • 例句与用法
  • This paper has made a detailed analysis of the temporal and spatial distribution of precambrian mineral deposits in china
    摘要文章详细地分析研究了中国前寒武纪矿床的时空分布。
  • The rocks coexist closely , distributing in a narrow and long belt in the late precambrian orogenic belt in northern liaoning
    它们紧密共生,呈狭长的带状分布于辽宁北部晚前寒武纪造山带内。
  • With the geological evolution in precambrian , minerogenetic materials and types of mineral deposits obviously varied and increased
    随著中国前寒武纪地史的演化,成矿物质种类和矿床类型具有明显的变化和增多。
  • Paleocontinental margins and rifts within paleocontinents are very favorable places for the distribution of precambrian mineral deposits in china
    而陆块边缘和陆块内部裂谷是前寒武纪矿床产出的十分有利的空间。
  • Precambrian mineral deposits are mainly distributed in paleocontinents especially in north china platform and yangtze platform , with a few distributed in orogenic belts
    中国前寒武纪矿床主要分布在陆块区,尤以华北陆块、扬子陆块较多,较少分布在造山带。
  • Stratum composition in xiaoqinling represents early precambrian crystal basement and mesoproterozoic era cover rocks of the typical north china craton
    小秦岭区内地层具有典型华北型早前寒武结晶基底和中元古代以来的盖层结构,不发育晚古生代、中生代构造层。
  • Their results , published in 1996 , postulated that bilaterians diverged from more primitive animals deep into the precambrian era , as much as 1 . 2 billion years ago
    他们的结果发表于1996年,其中推测,早在12亿年前的前寒武纪,两侧对称动物便已经从较原始的物种分支出来。
  • Precambrian madiyi formation in banbianshan , taojiang of hunan province is consisted of deep - water gravity flow deposits , deep - water traction current deposits and deep - water in situ deposits
    摘要湖南桃江半边山前寒武纪马底驿组为一深水重力流沉积、深水牵引流沉积与深水原地沉积共生组合。
  • In the new plan , the position of the studied strata in the stratigraphic column of late precambrian of china shows an impotant relation between sinian system and qingbaikou system on the geologic and biologic evolution
    新方案中这些地层在我国晚前寒武纪地层柱中的位置,反应出了震旦系与青白口系的地史演化及生物演化间的重要关系。
  • Amazingly , in 1998 two different groups of paleobiologists reported finding fossils with remarkable soft - tissue preservation in another precambrian lagerst ? tte ? the doushantuo formation in guizhou province of south china
    令人惊讶的是,在1998年,有两个不同的古生物学团队发现了另一个前寒武纪宝库,那是在中国贵州省的陡山沱组地层。
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  • 百科解释
The Precambrian (Pre-Cambrian) is the name which describes the large span of time in Earth's history before the current Phanerozoic Eon, and is a Supereon divided into several eons of the geologic time scale. It spans from the formation of Earth about 4570 Ma (million years) ago to the beginning of the Cambrian Period, about Ma, when macroscopic hard-shelled animals first appeared in abundance.
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