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.
在它经历成作用之前,它含有燧石质的胶结成分。成作用过程中,低温抵压改变沉积物的成分,而后固结成。
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.
在它经历成作用之前,它含有燧石质的胶结成分。成作用过程中,低温抵压改变沉积物的成分,而后固结成。
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