palacheite

例句：

1. 1. The construction site was covered in a layer of paleochrete.
   施工现场覆盖着一层浅灰色的斑岩。
2. 2. Palaeontologists study the fossils found in paleochrete deposits.
   古生物学家研究在斑岩沉积中发现的化石。
3. 3. The paleochrete formation is an important source of minerals for the local economy.
   斑岩层是当地经济的重要矿物来源。