The mining firm hired a consultant to review the site's stratigraphy before signing the contract.

這家礦業公司在簽約前聘請顧問審查該地點的地層學資料。

Please attach the stratigraphy report to the email so the investors can review it.

請將地層學報告附在電子郵件中，讓投資人可以審閱。

During the museum tour, our guide explained the stratigraphy of the canyon walls.

在博物館導覽中，我們的導遊解說了峽谷岩壁的地層學。