exotic block

• 外来岩块

exotic block的用法和样例：

例句

1. According to the recent study results,the original Baoxing Complex or Baoxing Anticlinorium is really an exotic rootless block consisting of many tectonic thrusting horses.
   原来的宝兴杂岩及宝兴复背斜实际上是由许多个冲断构造岩片所组成的无根外来岩块，属推覆体性质。