单词 | osar |
释义 | osarn. Geology. A long narrow ridge or mound of sand or gravel deposited by a stream flowing beneath a glacier; = esker n. Usually in plural. Cf. kame n. ΘΚΠ the world > the earth > land > landscape > high land > rising ground or eminence > [noun] > glacial mound moraine1783 osar1842 esker1852 kame1862 sow-back1874 push moraine1890 whaleback1893 recessional moraine1897 Ra1902 Salpausselkä1923 1842 Geologist 1 91 Long lines of Osars (or heaps of detrital matter) were found accompanying the erratic blocks. 1846 R. I. Murchison in Q. Jrnl. Geol. Soc. 2 i. 360 After..100 feet or more..we meet with the ‘Osar’ drift of foreign coarse boulders. 1884 Science 4 Apr. 404/1 (heading) The possible origin of some osar. 1889 G. F. Wright Ice Age N. Amer. 479 Osars and kames, whose conditions of formation were exceptional. 1902 Ohio Naturalist 2 257 (heading) A possible cause of osars. 1921 Philos. Trans. (Royal Soc.) B. 210 121 The Kilbeggan Esker, on the other hand, is like the Swedish osar,..and was probably deposited as a delta formation at the receding mouth of a glacial river. 1957 J. K. Charlesworth Quaternary Era I. xxi. 420 Osar..are tortuous or gently sinuous ridges. 1999 Géographie Physique et Quaternaire 53 12/1 This may have been the first suggestion that eskers exist in the White Mountains, although he stopped short of saying that the Giant's Grave was indeed an osar. This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022). < |
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