| 单词 | 凝灰岩 |
| 释义 | 〔ignimbrite〕A volcanic rock formed by the welding together of tuff material from an explosive volcanic eruption.熔结凝灰岩：火山喷发后凝灰物质聚集后形成的一种火成岩〔tuff〕from Old Italian tufo [tufa] * see tufa 源自 古意大利语 tufo [凝灰岩] * 参见 tufa〔trass〕A light-colored tuff used in hydraulic cement.粗面凝灰岩：一种用来生产硬水泥的淡色凝灰岩〔tuff〕A rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel. Also called tufa 凝灰岩：致密火山灰构成的岩石，大小以细粒至粗砾石不等 也作 tufa |
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