lithic graywacke

例句：

1. 1. The geologists found that the lithic graywacke is a good indicator of the age of the rocks.
   地质学家发现，石灰岩灰岩是判断岩石年龄的好指标。
2. 2.The construction company used lithic graywacke for the foundation of their new office building.
   建筑公司用石灰岩灰岩作为他们新办公楼地基的材料。
3. 3. The lithic graywacke was mined from the nearby mountains and used in various industrial processes.
   石灰岩灰岩从附近的山脉中开采出来，用于各种工业过程。