环状岩脉,或称为环状岩墙(Ring dike或Ring dyke),是地质学上一种侵入火成岩体。它的化学、岩石学、外表状态和岩脉或岩床相同,但却是绕著火山活动区域中心呈现同心圆或径向分布,这代表它是次火山活动形成的。
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