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。
The Precambrian stratigraphic unit has been found and mapped.
发现并填绘出前寒武纪地层单元。
Structure-stratigraphic method is an effective method for stratigraphic study in Precambrian metamorphic rock area.
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.
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。
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