| 单词 | mud-crack |
| 释义 | > as lemmasmud-crack mud-crack n. a crack formed in drying mud as a result of shrinkage. 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 1853 Catal. Cabinet Nat. Hist. State of N.Y. 36 Medina sandstone..(with mud cracks). Oswego village. 1863 J. D. Dana Man. Geol. 94 Rill-marks, mud-cracks, and rain-drop impressions. 1917 Jrnl. Geol. (Chicago) 25 135 (heading) Some factors affecting the development of mud-cracks. 1993 E. N. K. Clarkson Invertebr. Palaeontol. & Evol. (ed. 3) iii. 59/1 The fossils came from a shallow marine to littoral sequence..; the occasional emergence of shoals is shown by polygonal mudcracks at certain horizons. < as lemmas |
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