It is the unsolidified sediment consisting of disordered kaolinite and small amount organic matter and lignite materials.
常含少
有
质或与褐煤矿层等伴生。
It is the unsolidified sediment consisting of disordered kaolinite and small amount organic matter and lignite materials.
常含少有质或与褐煤矿层等伴生。
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均由互联网资源自动生成，部分未经过人工审
，
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