单词 | pingo |
释义 | pingon. Geomorphology. 1. A peak of rock that is covered by ice but remains distinguishable. Cf. nunatak n. rare (disused). ΚΠ 1928 L. Koch in Meddelelser om Grønland 65 196 To denote a mountain entirely or partly covered with ice but whose form is still distinguishable, the Polar-Eskimos use the name ‘Pingo’, a term which in these regions corresponds to the name ‘Nunatak’. The best example of a Pingo is Mt. Haffner, Pingorsoak, i.e. the great Pingo. 1928 L. Koch in Meddelelser om Grønland 65 197 We need no name for rounded nunataks. I have, however, introduced the name Pingo..to designate a mountain entirely submerged by the Inland Ice, but setting its mark upon the surface of the ice. 2. A broad conical or dome-shaped mound formed in regions with thin or discontinuous permafrost, consisting of a layer of soil over a large core of ice, often with a crater at the summit, and persisting for longer than one year. Also: a circular depression or rampart in temperate regions, frequently water-filled, thought to be the remains of such a mound formed during former periglacial conditions. ΘΚΠ the world > the earth > land > landscape > low land > hollow or depression > [noun] > other slack?a1400 swamp1691 cauldrona1763 hog wallow1829 tomo1859 kettle1866 pocket1869 dolina1882 kettle hole1883 frost hollow1895 impact crater1895 uvala1902 frost pocket1907 sotch1910 pingo1938 lagg1939 tafoni1942 the world > the earth > land > landscape > high land > rising ground or eminence > [noun] > small mound > type of bank1580 hedge-bank1776 spoil bank1830 palsa1938 pingo1938 lunette1940 1938 A. E. Porsild in Geogr. Rev. 28 46 In literature the name ‘gravel or earth mound’ seems to be fairly well established. The Eskimo name pingo, meaning conical hill, which has come into universal use in the north, is here introduced as an alternative.] 1938 A. E. Porsild in Geogr. Rev. 28 54 (caption) Pingo near Tuktuayaktok on the Arctic Sea coast east of the Mackenzie delta showing the irregular rupture of the summit. This pingo is 134 feet high. 1961 H. Maclennan Rivers of Canada 61 A fantastic region of submerged and emergent islands, of confused channels, of low banks slimy in summer from a permafrost several hundred feet deep out of which the occasional pingoe pops up. 1986 O. Rackham Hist. Countryside xvi. 350 Well-preserved pingos have a convincingly artificial look, as though somebody had dug a pit and banked the earth around it. 2000 N. Jans Tracks of Unseen 48 The frost line is so close to the surface that the land often is fractured into odd, polygonal shapes that appear man-made, or heaved into hillocks called pingos. This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < |
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