火山岩 meaning in English
[地质学] extrusive rcck; volcanic rock; volcanics; lava
◇火山岩玻璃 perlite; 火山岩台地 scabland
Examples
- Basalt is the commonest volcanic rock .
玄武岩是最普通的火山岩。 - The volcanics are most commonly andesitic in composition .
火山岩的组成最通常是安山岩。 - Volcanic rocks have high susceptibilities under normal conditions .
火山岩在正常情况下有强的磁化率。 - Fossils embedded in or between the volcanic layers can thus be dated by this method with great accuracy .
火山岩层间夹合的化石层可使这种测定年龄的方法极为精确。 - Rock fragments, including volcanics, are common, and the matrix consists largely of kaolin and illite .
常见有岩石碎块，包括火山岩屑，基质大部分为高龄土和伊利石。