schernikite

例句：

1. 1. The schernikite mine is located in the northern part of the country.
   这个石炭纪石灰石矿位于该国北部。
2. 2.The schernikite has been used for centuries as a building material.
   这种石炭纪石灰石被用作建筑材料有几个世纪了。
3. 3. The schernikite was discovered during an archaeological excavation in the area.
   这种石炭纪石灰石是在该地区的一次考古挖掘中发现的。