| 单词 | rock glacier |
| 释义 | > as lemmasrock glacier rock glacier n. Physical Geography a large mass of rock debris, in some cases mingled with ice, which moves gradually downhill in the manner of a glacier.Quot. 1888, referring to the Devon coast of England, is an isolated figurative use. ΘΚΠ the world > the earth > structure of the earth > structural features > boulder, pebble, or stone formation > [noun] > rock glacier or stone river rockfall?1797 stone river1877 rock glacier1888 rock stream1905 stone run1906 rock river1920 1888 Gentleman's Mag. Sept. 262 Over black inky rocks, and up as it were great mountains of rock glaciers, until we stood at length where our friend would have us stand. 1901 Bull. Geol. Soc. Amer. 12 466 Eight 8 x 10 photographs, by C. Whitman Cross... Rock glacier of Silver basin. 1954 W. D. Thornbury Princ. Geomorphol. iv. 85 Kesseli concluded that the rock glaciers of the Sierra Nevada were essentially fossil glaciers. 1968 R. W. Fairbridge Encycl. Geomorphol. 711/1 If the surface of the ice is densely covered with blocks, one may speak of a rock glacier, but, in North America, ‘rock glacier’ does not necessarily involve ice. 2004 New Scientist 27 Nov. 34/3 Rock glaciers are typically half rock and half ice. < as lemmas |
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