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。
The general tectonic framework controls the form of the depression and the distribution of the depositional systems in the accommodation, which is the fundamental reservoir formation condition.
总的构造格局决定了凹陷形态与沉积物在可容纳空间内的分布，这是油气成藏的先决条件；
The general tectonic framework controls the form of the depression and the distribution of the depositional systems in the accommodation, which is the fundamental reservoir formation condition.
总的构造格局决定了凹陷形态与沉积物在可容纳空间内的分布，这是油气成藏的先决条件；
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