| 单词 | malm rock |
| 释义 | > as lemmasmalm rock malm rock n. = sense 3. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > chalk > malm malmeOE malm rock1833 malmstone1889 the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > sandstone > greensand greensand1700 fox-mould1808 carstone1815 malm rock1833 potash greensand1869 1833 C. Lyell Princ. Geol. III. 292 The upper green-sand (‘firestone’, or ‘malm rock’, as it is sometimes called) is almost absent. 1876 D. Page Adv. Text-bk. Geol. (ed. 6) xviii. 349 ‘Malm rock’, a soft silicious substance, containing a large percentage of soluble silica. 1931 W. Johnson Jrnls. Gilbert White p. xv The houses as we gather from White's book, were built of malmrock,—a sandy limestone. < as lemmas |
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