| 单词 | volcanic arc |
| 释义 | > as lemmasvolcanic arc volcanic arc n. Geology a curved zone comprising volcanoes and volcanic or plutonic rocks, esp. one situated at the edge of a plate margin above a subduction zone; an island arc. ΚΠ 1887 W. L. Green Vestiges Molten Globe II. iii. 50 The Aleutian line of volcanoes..meet the Asiatic and American bands exactly at right angles, and the arc of a small circle formed by them, has the same centre as the great zone of fracture parallel to the plane of the ecliptic, so that this volcanic arc is also parallel to that plane. 1938 Philos. Trans. (Royal Soc.) B. 229 5 Few geologists to-day will fail to admit a direct connexion between volcanic arcs and tectonic movements. 1998 Nature 6 Aug. 523/3 Just occasionally, rocks in active volcanic arcs have a chemical signature which indicates that they were formed by melting of the subducted oceanic plate itself. < 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。