火山岩又称喷出岩（Effusive rock），属于岩浆岩（火成岩）的一类，是岩浆经火山口喷出到地表后冷凝而成的喷出岩。火山岩是岩浆喷出地表，在大气圈和水圈中冷却结晶形成的，当岩浆沿裂隙喷发时，火山岩形态一般与地表形态比较协调，呈被状或层状。
... rock slope岩石边坡；石坡；岩石坡；石流坡 volcanic rock火山岩；火成岩；火山碎屑岩 hard rock重摇滚；剧烈摇滚乐；硬质岩石 ...
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全风化火山岩层 completely weathered volcanic rock ; completely decomposed volcanic rock
高度风化火山岩层 highly weathered volcanic rock ; highly decomposed volcanic rock
风化火山岩 decomposed volcanic rock
全风化火山岩 completely weathered volcanic rock ; completely decomposed volcanic rock
高度风化火山岩 highly weathered volcanic rock ; highly decomposed volcanic rock
火山岩屑 volcanic detritur west bank ; volcanic lithoclast
火山岩屑土 volcanic detritus soil
副长火山岩 foidite
The analysis of volcanic petrology indicates that the volcanic lithofacies can be divided into volcanic breccia, lava, ash and sedimentary ones.
通过对火山岩岩石学特征分析,将火山岩岩相划分为火山角砾岩柑、火山熔岩相、火山灰相和火山沉积相。
参考来源 - 大洼油田中生界火山岩储集层特征Generally, Lava stuffing has better removal effect than clay ceramisite stuffing after comparing the treatment results.
4)对比处理效果发现,火山岩填料的处理效果总体上要优于粘土陶粒填料。
参考来源 - 曝气生物滤池处理喷水织机废水的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
人们普遍认为，具有如此高镁含量的火山岩是不可能存在的。
It was generally accepted that volcanic rocks with such high levels of magnesium could not exist.
这一样本包括曾经柔软的的硬化沉积物的卵石、深海淤泥以及石膏颗粒和火山岩碎片。
The sample consisted of pebbles of hardened sediment that had once been soft, deep-sea mud, as well as granules of gypsum and fragments of volcanic rock.
他们建造了成千上万的圆形石质防风林并在其中种植花草，还用破碎的火山岩来保持土壤湿润。
They built thousands of circular stone windbreaks and gardened inside them, and used broken volcanic rocks to keep the soil moist.
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