| 单词 | sand ripple |
| 释义 | > as lemmassand ripple sand ripple n. one of a series of small parallel ridges or undulations in the surface of sand. ΘΚΠ the world > the earth > land > landscape > high land > rising ground or eminence > [noun] > undulation > sand-wave sand wave1820 sand ripple1879 megaripple1953 1879 T. D. Forsyth in E. D. Morgan tr. N. M. Prejevalsky From Kulja to Lob-Nor 27 The upheaval of the Gobi..causes an entirely independent direction of profile..to that of the sand-ripples which cover it. 1897 Geogr. Jrnl. 9 279 The uniformity of the wind-ripple pattern is at all times remarkable. In water-formed sand-ripples no such uniformity has been recorded. 1941 R. A. Bagnold Physics of Blown Sand & Desert Dunes xi. 144 A sand ripple is merely a crumpling or heaping up of the surface, brought about by wind action, and cannot be regarded as a true wave in a strict dynamical sense. 1960 B. W. Sparks Geomorphol. xi. 248 The formation of sand ripples is closely connected with the process of saltation. < as lemmas |
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