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| 石煤主要由菌藻类植物遗体在早古生代的浅海、泻湖、海湾等环境中,经腐泥化作用和煤化作用转变成的低热值、煤化程度高的固体可燃矿产。一般含大量矿物质，以外观似黑色岩石而得名 | |||
| 石煤 | |||
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