燧石

The host rock conformably overlies a band of siliceous chertybrecia.

含矿主岩整合地上覆于硅质燧石角砾石带之上。

This rock contained chalcedonic cement before it underwent diagenesis, a process where low temperatures and low pressures alter the content of sediments before they finally lithify, or turn into rock.

在它岩作用之前，它含有燧石质胶结。岩作用过程中，低温抵压改变了沉积物，而后固结岩。