| 释义 |
dreikanter|ˈdraɪkantər, -kæntə(r)|
Pl. dreikanter, -ers.
[a. G. dreikanter, lit. three-edged thing, f. drei three + kante edge (see cant n.1) + -er -er1.]
An angular, faceted pebble the surface of which has been cut by wind-blown sand; esp. one with three facets.
1903Nature 10 Dec. 143/1 A collection of wind-worn pebbles of quartz and quartzite from an old raised beach near Waverley, North Island, New Zealand,..was exhibited by the president. They have been cut by the sand driven by the wind into the characteristic Dreikanter. 1938A. K. Wells Outl. Hist. Geol. xiii. 147 The quartzite and other pebbles in the Keuper in this region are not dreikanters. 1944A. Holmes Princ. Physical Geol. xiii. 258 Such wind-faceted pebbles, which often resemble Brazil nuts,..are known as dreikanter or ventifacts. 1946F. E. Zeuner Dating Past Pl. x. (caption) A ‘dreikanter’, a quartzite boulder facetted by blown sand. 1970R. J. Small Study of Landforms ix. 301 Such abrasion is capable of..shaping individual boulders and small stone into ‘ventifacts’, notably the well-known ‘dreikanter’ with their three faceted sides. |