发现并填绘出前寒武纪地层单元。

The Precambrian stratigraphic unit has been found and mapped.

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环斑花岗岩是发育于前寒武纪的一种特殊岩石。

Rapakivi is a special rock in Precambrian.

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构造地层学方法是变质岩，尤其是前寒武纪变质岩地区地层研究的有效方法。

Structure-stratigraphic method is an effective method for stratigraphic study in Precambrian metamorphic rock area.

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构造地层学方法是变质岩，尤其是前寒武纪变质岩地区地层研究的有效方法。

Structure-stratigraphic method is an effective method for stratigraphic study in Precambrian metamorphic rock area.

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