noun ダウンロード 🔗共有 杏仁状岩 A variety of trap or basaltic rock, containing small cavities, occupied, wholly or in part, by nodules or geodes of different minerals, especially agates, quartz, calcite, and the zeolites. When the imbedded minerals are detached or removed by decomposition, it is porous, like lava. Examples : "The old volcanic flow, now visible as a weathered cliff face, was identified as amygdaloids due to the numerous cavities filled with sparkly quartz crystals. " 現在風化した崖面として見える古い火山流は、キラキラ光る石英の結晶で満たされた多数の空洞のため、杏仁状岩として特定された。 geology mineral material AIとチャット語彙ゲーム読解練習
