... 地质岩石学 geological petrology 第三纪火成岩 Tertiary igneous rock 电气石花岗岩 luxul(l)ianite ...
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在第三纪的喜山期岩浆活动较强烈,因此,坳陷内第三纪火成岩分布广泛。
The Tertiary igneous rocks broadly distribute in this depression, since of magmatic activity was very frequent during the Xishan Epoch.
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火成岩活动主要集中在晚第三纪和第四纪。
The activity of igneous rocks mainly concentrates in Neogene and Quaternary.
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