Huashiban Formation

例句：

1. 1. The Huashiban Formation is a significant geological formation in China.
   胡世班系是中国重要的地质构造。
2. 2. The study of the Huashiban Formation has revealed many secrets about Earth's history.
   胡世班系的研究表明了地球历史的许多秘密。
3. 3. The Huashiban Formation contains fossils that are over 100 million years old.
   胡世班系含有超过一亿年的化石。