cathkinite

例句：

1. 1. The cathkinite layer is a key to understanding the geological history of the region.
   凯金特岩层是理解该地区地质历史的关键。
2. 2. The cathkinite layer is an important source of minerals for mining.
   凯金特岩层是重要的矿物开采来源。
3. 3. The cathkinite layer has been studied extensively in recent years due to its potential as a building material.
   近年来，由于其作为建筑材料的潜力，凯金特岩层得到了广泛的研究。