| 单词 | mantle rock |
| 释义 | > as lemmasmantle rock mantle rock n. Geology (a) a superficial deposit of rock; (b) rock that forms or formerly formed part of the earth's mantle. ΘΚΠ the world > the earth > structure of the earth > constituent materials > [noun] > material of earth's crust rock1671 mantle rock1896 sima1909 sial1922 asthenolith1929 pyrolite1962 1896 J. W. Powell in Physiogr. U.S. (National Geogr. Soc.) 14 The materials may be called mantle rocks or superficial deposits. 1954 W. D. Thornbury Princ. Geomorphol. v. 104 Mantle rock..is moved downslope by creep, slump, other types of mass-wasting, and by sheet-wash. 1994 Trav. Guide 1994 Newfoundland & Labrador 4 Ramble over an ancient expanse of mantle rock. Where colossal collisions of tectonic plates created formations as barren as the moon. < as lemmas |
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