释义 |
coˈrrasion [n. of action (on L. type *corrāsiōn-em), f. L. corrādĕre to corrade: cf. abrasion.] †1. The action of scraping together: see corrade. Obs. rare.
1611Speed Hist. Gt. Brit. ix. ix. (1632) 620 These and other importunate corrasions, were not made only to fill vp such breaches as the French affaires had produced, but also to spend in entertainments. Ibid. 624 The Popes endlesse Corasions from yeere to yeere. 2. Geol. The local wearing away of the surface of the earth by the agency of moving air, water, glacial ice, etc., in conjunction with any matter transported by them.
1875J. W. Powell Explor. Colorado River xi. 152 The proof is abundant that the river cut its own channel; that the cañons are gorges of corrasion. 1877G. K. Gilbert Geol. Henry Mts. 101 In corrasion the agents of disintegration are solution and mechanical wear. 1904Chamberlin & Salisbury Geol. (1905) I. 108 The more active and tangible processes by which surface rocks are broken up, such as wave wear, river wear and glacier wear, are processes of corrasion. 1937Wooldridge & Morgan Physical Basis Geogr. xi. 153 The work of vertical or lateral cutting performed by a river in virtue of the abrasive power of its load is termed corrasion. 1958P. Lake Physical Geogr. (ed. 4) 297 Clear water does very little corrasion of solid rock. 1970R. J. Small Study of Landforms ii. 42 Stream erosion is usually said to involve three distinct processes: downward corrasion..lateral corrasion..and headward extension. |