矿层

The ore-bearing rock is composed mainly of andesitic tuff and tuffite.

作者在赋矿层中首次发现了层状电气石岩。

It is the unsolidified sediment consisting of disordered kaolinite and small amount organic matter and lignite materials.

常有机质或与褐煤矿层等伴生。

Kapeng syderolite deposit is large,occurred in purple clayey ferruginous mudstone and grey-green clayey shale of Lower Silurian series.

卡棚大型紫砂陶土矿主要赋存于留系统紫红色粘土质铁泥岩和灰绿色粘土质页岩中,分上2矿岩系,4矿层。