| 单词 | quartz porphyry |
| 释义 | > as lemmasquartz porphyry quartz porphyry n. [after German quarziger Porphyr (1789 in the passage translated in quot. 1798)] Geology porphyritic rock consisting of phenocrysts of quartz and alkali feldspar (usually orthoclase) embedded in a microcrystalline or cryptocrystalline groundmass; a rock of this kind. ΚΠ 1798 G. Mitchell tr. D. L. G. Karsten Descr. Minerals in Leskean Mus. II. 392 Smoke grey very fine Quartz Porphyry [Ger. quarziger Porphyr], with traversing Slips of Sparry Iron Ore. 1846 Jrnl. Royal Geogr. Soc. 16 220 Higher up the river basaltic ridges predominate, which are several times interrupted by quartz porphyry. 1940 F. F. Grout Kemp's Handbk. Rocks (ed. 6) iii. 64 The pre-Tertiary representatives were called quartz-porphyries. 2006 Jrnl. S. Amer. Earth Sci. 20 342/1 Pegmatites, aplites, and, in some cases, quartz porphyries and rhyolites are related to the plutons. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。