Spergen limestone

例句：

1. 1. The construction of the newbridge was made possible by the discovery ofSpergen limestone in the area.
   新桥的建设得益于该地区发现斯佩尔根石灰石。
2. 2. The ancient city iscovered with layers of Spergen limestone that have been eroded overthousands of years.
   这个古城被层层覆盖着斯佩尔根石灰岩，这些石灰岩已经经历了数千年的侵蚀。
3. 3.The Spergen limestone formation isa popular tourist attraction due to its uniquegeological features.
   由于其独特的地质特征，斯佩尔根石灰岩形成是一个受欢迎的旅游景点。