limerock

例句：

1. 1. The limestone formations in the area are unique and beautiful.
   该地区的石灰岩形成物独特且美丽。
2. 2.The limestone quarry is a popular tourist attraction.
   石灰岩采石场是一个受欢迎的旅游景点。
3. 3. The limestone layer has been eroded by water over millions of years.
   石灰岩层在数百万年的时间里被水侵蚀了。