冀东迁西洒河桥是太古代麻粒岩相变质岩系广泛出露的地区.

Archaean era granulite facies metamorphite series are extensively outcropped in Sa - heqiao, Hebei province.

铁克力克可能有新太古代变质岩系的存在。

The neo- Archean rocks possibly exist in Tieklik metamorphic rocks.

铁克力克可能有新太古代变质岩系的存在。

The neo-Archean rocks possibly exist in Tieklik metamorphic rocks.

在晚太古代有“双峰态”火山活动、碱性岩浆喷发和侵入，反映了裂谷拉张特征。

During the late archaeozoic there was bimodal volcanism alkalic magma eruption and intrusion showing the tension-riftedcharacteristics of the valleys.

从太古代到新生代，几乎各个时期都有岩浆活动。

From Archeozoic to Cenozoic, there were magmatic actions in occurrence during every period.

从太古代到新生代, 几乎各个时期都有岩浆活动.

From Archeozoic to Cenozoic , there were magmatic actions in occurrence during every period.

如此低的硫酸盐浓度,表示太古代大气中的氧气极为稀薄.

Such low levels of sulfate indicate that the Archean atmosphere was virtually devoid of oxygen.

蛇绿岩套中的豆荚状铬铁矿提供了中国存在新太古代蛇绿岩的确切证据。

The podiform chromite associated with these structural lenses is only reported in ophiolites.

地球的历史可分为四个时期——依次经历冥古代、太古代、元古代和显生宙。

The history of Earth is divided into four eons —starting with the earliest, these are the Hadean, Archean, Proterozoic, and Phanerozoic.

该类矿床的成矿时代多集中在晚太古代末至早元古代初期,并且具有全球性.

This type of graphite deposits were formend in the Late Archaean to Early Proterozoic.