From Wikipedia, the free encyclopedia
火成岩（粵拼：fo2 sing4 ngaam4），又叫岩漿岩，係石頭類型，包括花崗岩、安山岩、玄武岩同、橄欖岩、凝灰岩同浮石。岩漿或者熔岩冷卻凝固成形嘅。常見分類有兩種：噴出（地表形成）或入侵性（地底形成），同埋以二氧化矽含量劃分。
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