iddingsite
plural of malpighia
plural of demos
(mineralogy) A mixture of clay minerals and iron oxides formed by alteration of olivine
comparative form of achy: more achy
地質学者は玄武岩の試料の中に、橄欖石の変質で生じた粘土鉱物と酸化鉄の混合物を確認し、その赤褐色の着色と繊維状の質感に注目した。
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