燧石

The host rock conformably overlies a band of siliceous chertybrecia.

含矿主岩整合地覆于硅质燧石角砾石带之。

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.

经历岩作用之前，含有燧石质的胶结分。岩作用过程中，低温抵压改变了沉积物的分，结岩。