Two major glacial epochs occurred in these regions during the last 100 million years of the Precambrian era.

在前寒武纪的最后1亿年中，两个主要的冰川时期出现在这些地区。

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Gneiss, a metamorphic rock, can be commonly found in Precambrian areas.

片麻岩, 变质岩, 可以发现,在常见的前寒武纪地区.

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In Britain, Cambrian rocks are found in Wales and North - West Scotland.

在英国的威尔士和苏格兰的西北部,发现了寒武纪的岩石.

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Early - Precambrian rocks are widely exposed in Dunhuang - Beishan area, GansuProvince.

甘肃敦煌 - 北山地区广泛出露早前寒武纪岩石.

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Rapakivi is a special rock in Precambrian.

环斑花岗岩是发育于前寒武纪的一种特殊岩石.

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Late Precambrian mafic dyke swarms are extensively developed in the central North China Craton.

华北克拉通中部广泛发育晚前寒武纪镁铁质岩墙群.

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The basement in South Qinling, Mianxian Lueyang Yangxian and areasdistributed in some sporadic and is.

依据陕南秦岭造山带区域地质及重力资料, 按是否露出地表将前寒武纪基底划分为出露基底和隐伏基底两种类型.

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Of , belonging to, or designating the earlier of two divisions of the Precambrian era.

(地质学)在前寒武纪后半部分形成的.

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Precambrian time accounts for as much as eighty - five percent of all geological time.

前寒武纪占据了整个地质年代的百分之85.

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Mount Taishan is the representative place for the study of the Ante Cambrian geology in China.

泰山是我国研究早前寒武纪地质的经典地,也是国际早前寒武纪研究的知名地区.

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It dates to the very early Cambrian period, and it also contains only soft - bodied forms.

它形成于寒武纪的早期, 并且同样只含有软体动物化石.

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Cambrian stratigraphy well developed in Luxi ( west of Shandong ), and their sedimentary records possesses cyclicity.

鲁西地区寒武纪地层发育较好, 沉积记录具旋回性的特点.

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Among them the Precambrian and Cenozoic eras are the main metallogenic epoches in the world.

就全球而言,前寒武纪和新生代是金矿的重要成矿期.

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This is the first time in the study and mapping of the Cambrian in South China.

这种定量的岩相古地理图在中国南方寒武纪还是首次出现.

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It occurs in the lime dolomite and dolomite lime of Cambrian Zhushadong Formation.

该类金矿赋存于寒武纪朱砂洞组灰质白云岩和白云质灰岩中.

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