单词 | desiccation-crack |
释义 | > as lemmasdesiccation-crack b. attributive, as desiccation-crack, in Geology, a crack produced in a bed of clay in the process of drying, and subsequently filled by a new deposit of soft matter. ΚΠ 1859 D. Page Handbk. Geol. Terms 143 Appearances..known as desiccation cracks..not to be confounded with ‘joints’, ‘cleavage’ and similar phenomena. 1880 A. R. Wallace Island Life vi. 85 Irregular desiccation marks, like the cracks at the bottom of a sun-dried muddy pool. 1882 A. Geikie Text-bk. Geol. iv. i. 485 These desiccation-cracks or sun-cracks..prove that the surface of rock on which they lie was exposed to the air and dried before the next layer of water-borne sediment was deposited upon it. < as lemmas |
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