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来自维基百科,自由的百科全书
细晶岩为酸性、浅色的岩浆岩,是典型的细晶结构,几乎不含深色的矿物,主要成分为长石和石英,所以又名长英岩,外貌多为沙糖状,是由残余的熔岩岩浆结晶而成的,按照其矿物成分可以划分为:
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