Yipinglang Formation

例句：

1. 1. The Yipinglang Formation is a geological formation located in the southern part of China.
   玉屏岩组是中国南部的一个地质构造。
2. 2.The study of the Yipinglang Formation has revealed many ancient human activities.
   对玉屏岩组的研究揭示了许多古代人类活动的信息。
3. 3. The Yipinglang Formation is considered to be one of the oldest known rock layers in China.
   玉屏岩组被认为是中国已知最古老的岩石层之一。