古元古代_有道手机词典

paleoproterozoic era

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1.山西吕梁群流纹岩是一个古元古代的弱碱性火山岩。
The rhyolites in the Upper Luliang Group of Shanxi Province of China are Palaeoproterozoic A-type volcanic rocks.
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2.古元古代二道洼岩群分布区已发现一批金矿床和金矿化点。
In Erdaowa's Group area some gold deposits and mineralization spots have been discovered.
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3.古元古代地层缺乏种类繁多的标准化石，这使大区域性的、全球性的地层对比难以实现。
Palaeoproterozoic formation lacks variety of standard fossils, thus it become difficult to compare the whole world formations or large .
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