| 单词 | rhomb-porphyry |
| 释义 | > as lemmasrhomb-porphyry rhomb-porphyry n. [after German Rhombenporphyr (L. von Buch 1810, in the passage translated in quot. 1813)] Geology a porphyry (porphyry n. 3) containing feldspar phenocrysts with a rhombic cross-section. ΚΠ 1813 J. Black tr. L. von Buch Trav. Norway & Lapland iii. 50 This very porphyry, with the singular rhombs of felspar, is by no means rare in the porphyry mountains... This porphyry may therefore be called rhomb-porphyry. 1895 L. Fletcher Introd. Study Rocks 104 A quartz-less division [of porphyries]..includes various rocks chemically allied to syenite; among them are..orthoclase-porphyries, rhomb-porphyries and keratophyres. 1990 C. Pellant Rocks, Minerals & Fossils 17/3 This group of rocks also includes the rhomb-porphyrys of Norway which are so characteristic of that area that they are useful as indicators of glacial movement. < 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。