volcanics是什么意思？

volcanics

例句

• 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.
• Granite greenstone - hosted , meta - clastics - hosted , volcanics - subvolcanics hosted and sedimentary rock - hosted micro - disseminated gold deposits are of industrial value. 具有工业价值的金矿类型以花岗岩 - 绿岩型、变碎屑岩型 、 微细 浸染型 、 火山-次火山岩型为主.