noun🔗Share橄榄岩 A rock consisting of small crystals of olivine, pyroxene and hornblende; the major constituent of the Earth's mantle."The geologist studied the peridotite sample, knowing it represented a piece of the Earth's mantle. "地质学家研究了这块橄榄岩样本，因为他知道它代表了地球地幔的一部分。geologymaterialmineralChat with AIVocabulary GamePractice Reading
