tertiary epoch

• 第三系

tertiary epoch的用法和样例：

例句

1. The main interval with oil &gas showing in the well is a tertiary formation.
   本井的主要油气显示段在第三系。
2. Qujing Basin is one of several Tertiary sedimentary basins with the discovered biogenic gas resources in Yunnan Province.
   曲靖盆地是在云南省发现的具有工业价值生物气藏的第三系沉积盆地之一。