| 单词 | sun crack |
| 释义 | > as lemmassun crack sun crack n. a crack produced esp. in soil or rock as a result of shrinkage in sunlight or hot, dry conditions. ΘΚΠ the world > the earth > structure of the earth > structural features > discontinuity or unconformity > [noun] > fissure or crack clinta1400 shake1747 grike1781 sun crack1831 mud-crack1853 shrinkage crack1867 1831 Christian Advocate Sept. 467/1 He took a maple plank, or board,..which was in itself very smooth, except that it was full of cracks, like sun cracks. 1848 Brit. Farmer's Mag. 13 348/1 I have invariably found that the drought or sun-cracks (caused by dry summers) have descended from three to four feet in depth. 1952 W. J. Miller Introd. Hist. Geol. (ed. 6) xix. 266 Many of the beds show suncracks, raindrop pits, ripple marks, and footprints and remains of land reptiles (dinosaurs). 2014 M. R. Dhital Geol. of Nepal Himalaya (2015) iv. 46/2 The interbedded purple, red, and green micaceous shales contain many sun cracks. < as lemmas |
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