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

作者在赋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.

常含少量有机或与层等伴生。

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

卡棚大型紫砂陶主要赋存于留系下统紫红色含铁泥岩和灰绿色页岩中,分上下2个含岩系,4个层。