命名为“石炭” ，是指这个煤。

The name "Carboniferous" refers to this coal.

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渤海湾盆地是中、新生代裂谷盆地与石炭-二叠系残留含煤盆地的复合叠合盆地。

Bohaiwan basin is a composite basin polymerized by a Mesozoic and Cenozoic rift basin and a Carboniferous remnant coal-bearing basin.

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应用分形的思路和方法研究了石炭-二叠系含煤地层砂岩粒度分布的分形特征。

Fractal theory was used in this paper, and fractal feature of grain distribution of sandstone in coal-bearing strata in Permo Carboniferous System was studied.

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