Yanshanian Stage

• 燕山期

Yanshanian Stage的用法和样例：

例句

1. The Yanshanian ductile shearing resulted in further enrichment of gold and antimony.
   燕山期叠加的脆性变形使金锑矿进一步富集。
2. Yanshanian acid is a mountain of granite, mostly granite and coarse-grained porphyritic granite.
   山地属燕山期酸性花岗岩，多为粗粒花岗岩和斑状花岗岩。