矿物往往埋藏在地层深处.Minerals are often found deep in the ground.在圈定地层过程中,植被往往具有很大的作用.The role of vegetation in outlining formations is often of great help.我们把它们当作实际上的地层单元来考虑,它们主要由岩浆沉积作用所产生.We regard them as actural stratigraphic...

“地层”的拼音为：dì céng...

“地层”的英语可以翻译为：[地质] stratum，layer，serati，geosphere ...

“平地层”的英语可以翻译为：table ...