| 单词 | sand glacier |
| 释义 | > as lemmassand glacier sand glacier n. Geomorphology (see quot. 1972). ΘΚΠ the world > the earth > structure of the earth > structural features > deposited by water, ice, or wind > [noun] > wind-blown drifta1400 wave1789 sand glacier1875 lunette1940 sand shadow1941 the world > the earth > land > landscape > level land > [noun] > plateau > types of puna1604 potrero1872 sand glacier1875 parma1888 1875 Encycl. Brit. III. 599/1 Among the less ordinary geological phenomena [of the Bermudas] may be mentioned the ‘sand glacier’ at Elbow Bay. 1897 Geogr. Jrnl. 9 286 Wind blowing outwards from a deep sand tract forms a horizontal plateau terminated by a talus as steep as the sand can rest. Under these conditions the encroachment of sand recalls the manner of advance of a glacier, and to this formation I restrict the term ‘sand glacier’. 1919 Proc. Royal Soc. Victoria 31 416 The typical forms of sand accumulation known as ‘sand glaciers’, which have been described in various parts of the world are due to sand being blown up the sides of hills or mountains, thence finding a passage through any passes or saddles, and spreading out on the opposite sides to form wide fan-shaped plains. 1972 Gloss. Geol. (Amer. Geol. Inst.) 627/2 Sand glacier. (a) An accumulation of sand that is blown up the side of a hill or mountain and through a pass or saddle, and then spread out on the opposite side to form a wide fan-shaped plain. (b) A horizontal plateau of sand terminated by a steep talus slope. < as lemmas |
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