| 单词 | rock flour |
| 释义 | > as lemmasrock flour rock flour n. Geology finely powdered rock, esp. that formed as a result of glacial erosion. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > [noun] > powdered rock rock flour1878 1878 Trans. Wisconsin Acad. Sci., Arts & Lett. 4 206 There is every gradation of material, from boulders several feet in diameter, down to the finest rock flour. 1937 Geogr. Jrnl. 89 43 Great angular blocks of rock are embedded in a jumble of fragments from the size of dust upwards,..a loose breccia of large pieces associated with smaller ones grading down to the finest rock-flour. 2001 H. Holmes Secret Life Dust iv. 50 The streams of melted ice that trickle out of glaciers are often a gorgeous shade of gray-green, due to the rock flour they carry. < as lemmas |
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