The ore-bearing rock is composed mainly of andesitic tuff and tuffite.
作者在赋矿中首次发现电气石岩。
It is the unsolidified sediment consisting of disordered kaolinite and small amount organic matter and lignite materials.
常含少量有机质或与褐煤矿等伴生。
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系下统紫红色粘土质含铁泥岩和灰绿色粘土质页岩中,分上下2个含矿岩系,4个矿。
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But here, the seam runs straight through this mountain.
不过在这矿层从山穿过。
Levels like 925 West, which Todd, Brant, and Larry have just journeyed down to.
像925西区这样的矿层,托德、布兰特刚刚下到的地方。
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