Because of the deposition time and the degree of silicification of different bedding structure very different form, Qianceng stone to jade ancient depositional age.
因其沉积年代及硅化程度的不同，形成的层理结构迥然有异，沉积年代久远的千层石近于玉质。
Because of the deposition time and the degree of silicification of different bedding structure very different form, Qianceng stone to jade ancient depositional age.
因其沉积年代及硅化程度的不同，形成的层理结构迥然有异，沉积年代久远的千层石近于玉质。
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