碎屑的

The alabandite and getchellite of hydrothermal origin, cement anatase of alkaline volcanic origin, and the high content of chlorite in coal were fist found in coals.

在西南地区晚二叠世煤中首次发现了热液成因硫锰和硫砷锑、碱性火山灰成因锐钛和陆成因斜绿泥石。