Any of various dark, granite - textured, crystalline rocks rich in plagioclase and having little quartz.

闪长岩一种黑色花岗岩的纹理的结晶质火岩石，富有斜长石，含有少量石英。

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Any of various dark, granite - textured, crystalline rocks rich in plagioclase and having little quartz.

闪长岩一种黑色花岗岩的纹理的结晶质火岩石，富有斜长石，含有少量石英。

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