Its natural types are roasted kaolin, burnt breccia, burnt rock and burnt mudstone.

焙烧高岭土、火烧角砾岩、火烧岩、烧变泥岩四种矿石自然类型。

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The coal seam roof of Huojitu mine is the burnt rock, which is the water impregnated aquifer, is dangerous to mine safety.

烧变岩是活鸡兔矿井的顶板充水含水层，直接威胁着矿井的生产安全。

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Burnt rock is come into being coal bed self-ignite and bring wall rock metamorphose and has special engineering geological characteristics.

烧变岩是煤层自燃引起周围围岩变质而形成的，具有特殊的工程地质性质。

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Available in several colors--including Dragon Jacquard, Burnt Adobe and Roasted Brown--it means college students can now rock out to their favorite tunes as they make their way across campus.

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