noun
diagenesis
Geological term for the physical and chemical changes that convert sediment into sedimentary rock after deposition, excluding weathering and metamorphism.
続成作用によって砂が砂岩に変わる。
Sand turns into sandstone through diagenesis.
Compound of 続成 (diagenetic, from 続 'continue' + 成 'form') and 作用 (action, process). The term is a direct translation of the English geological term 'diagenesis'.