| 单词 |
phenocryst |
| 释义 |
phenocryst|ˈfiːnəkrɪst|
[ad. mod.F. phénocryste, irreg. f. Gr. ϕαίνειν to show + κρύστ(αλλος crystal.]
Each of the large or conspicuous crystals in a porphyritic rock.
1893Geikie Textbk. Geol. ii. (ed. 3) 155 Two phases of consolidation..to be observed, the first (porphyritic) marked by the formation of large crystals (phenocrysts) which were often broken and corroded by mechanical and chemical action. 1903H. B. Guppy in Daily Chron. 7 Nov. 3/3 The pyroxene phenocrysts usually are represented by separate crystals of the monoclinic as well as the rhombic type. |
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