noun🔗Share安山岩A class of fine-grained intermediate igneous rock, of volcanic origin, containing mostly plagioclase feldspar."The rocky cliff was made of andesite, a volcanic rock common in this region. "その岩だらけの崖は、この地域で一般的な火山岩である安山岩でできていた。geologymaterialChat with AIVocabulary GamePractice Reading
