| 单词 | boulder-formation |
| 释义 | > as lemmasboulder-formation boulder-formation n. a formation or deposit consisting of mud, clay, etc., in which boulders are embedded. ΘΚΠ the world > the earth > structure of the earth > structural features > boulder, pebble, or stone formation > [noun] > boulder formation boulder-formation1845 boulder-drift1876 boulder-pavement1894 boulder-train1967 1845 C. Darwin Jrnl. (ed. 2) ix. 180 Fragments of primitive rocks, derived from the surrounding boulder-formation, were equally numerous. < as lemmas |
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