Precambrian stratigraphy

• 前寒武系

Precambrian stratigraphy的用法和样例：

例句

1. Shaba granulite is an important component of the Precambrian metamorphic complex on the western margin of the Yangtze landmass.
   沙坝麻粒岩是扬子陆块西缘前寒武系变质杂岩的重要代表。