The type of coal - forming is humic coal, vitrinite is a main variations of coal maceral.
煤的成因类型以腐植煤为主, 镜质组为主要的显微煤岩组分.
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Resinite is a rich n 1 aceral in Teriary humic coal, boghead - cannel coal and oil shale fromHuangxian Coalfield.
黄县煤田第三纪腐殖煤 、 藻烛煤、油页岩显微组分富含树脂体.
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