矿层

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

作者在赋矿层首次发现了层状电气石。

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

常含少量有与褐煤矿层等伴生。

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下统紫红色粘土含铁泥和灰绿色粘土页,上下2个含矿系,4个矿层。