| 释义 |
yardang Physical Geogr.|ˈjɑːdæŋ|
Also jardang.
[a. Turk., abl. of yar steep bank, precipice.]
A sharp, irregular ridge of sand or the like, lying in the direction of the prevailing wind in exposed desert regions and formed by erosion by the wind of adjacent less resistant material.
1904S. Hedin Sci. Results Journey in Central Asia I. xxvii. 439 At intervals furrows or trenches in the clay sub⁓soil, called jardangs, traced between long elevations or ridges, crop up amongst the dunes. 1934Bull. Geol. Soc. Amer. XLV. (caption facing p. 160) Looking down one of the narrower wind-scoured troughs, with a sharp yardang (seven feet high) on the left and a higher one on the right. 1970R. J. Small Study of Landforms ix. 301 Probably the only landforms of deserts that can be confidently ascribed to wind abrasion alone are the comparatively unimportant ‘yardangs’ and allied ‘ridge-and-furrow’ features. 1979Nature 5 Apr. 535/1 In other regions [of Mars], the surface has been stripped, yardangs have formed, and in general the topography seems to have been largely configured by aeolian activity. |