leaf shale

例句：

1. 1. The geologist foundthe leaf shale in the area.
   地质学家在该地区发现了页岩。
2. 2. The constructionof the new road will require the removalof the leaf shale.
   修建新路需要移除页岩。
3. 3. The leaf shaleis a valuable resource for oil and gasextraction.
   页岩是石油和天然气开采的重要资源。