lower Permian series

• 下二叠统

lower Permian series的用法和样例：

例句

1. The secondary dolomite and paleokarst of the Lower Permian Series in Sichuan Basin is one of the important atectonic reserviors in the basin.
   四川盆地下二叠统中次生白云岩及古岩溶是下二叠统主要的非构造圈闭储层之一。
2. Abundant materials for karstification in Jinfoshan are provided by medium or thick-bedded blocky limestone and biologic clastic limestone of the Lower Permian system.
   下二叠统的中厚层块状灰岩及生物碎屑灰岩给金佛山岩溶作用的发生提供了坚实的物质基础。