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Topaz occurs in the igneous rock rhyolite .

黄晶通常产于火成岩岩石纹。

What he believed to be igneous , was in fact sedimentary .

那些他原以为是火成岩的东西，其实是沉积岩。

Igneous rock forms when magma cools and solidifies .

当岩浆冷却、凝固，岩浆岩就形成了。

Were large igneous provinces caused by mantle plumes ?

大火成岩省是地幔柱作用引起的吗？

But must see the army and the people of igneous dynamite industry writtens guarantee .

但是必须看到火炸药行业军民结.