杏仁孔[1]（英语：amygdules），又称为小杏仁孔[2]、杏仁状体，是指火山岩或其他喷出火成岩中的杏仁状气泡孔隙被次生矿物充填，如方解石、石英、绿泥石或沸石等。杏仁状体通常是在岩石形成后再充填的[3]。火成岩中的气泡孔隙是由岩浆所含气体或水汽到地面降压后膨胀而形成[4]。
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参考文献
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