attitude of stratum

例句：

1. 1. The geologist is studying the stratum beneath the city.
   地质学家正在研究城市下方的地层。
2. 2. Themineralogist found anew type of mineral in thestratum.
   矿物学家在地层中发现了一种新的矿物。
3. 3. The archaeologistsare excavating the stratum touncover ancient civilizations.
   考古学家正在挖掘地层，以揭示古代文明。