gneissoid

例句：

1. 1. The rock is made up of gneiss and quartz.
   这岩石由片岩和石英组成。
2. 2.Gneiss is a type of sedimentary rock that forms when molten rock cools and solidifies.
   片岩是一种沉积岩，当熔融的岩石冷却并固化时形成。
3. 3. The gneiss was discovered in the mountains during the early exploration of the area.
   片岩是在该地区早期探索期间在山区发现的。