| 单词 | polar wandering |
| 释义 | > as lemmaspolar wandering polar wandering n. Geology the slow, erratic movement of the earth's poles relative to the continents which is thought to have occurred throughout geological time and is ascribed largely to continental drift; (in extended use) a corresponding movement on other planets. ΘΚΠ the world > the universe > planet > [noun] > part of planet > polar wandering polar wandering1909 the world > the earth > geodetic references > [noun] > pole > axis > movement nutation1703 pendulation1908 polar wandering1909 polar wander1957 1909 Proc. Royal Soc. A. 82 90 ‘We need not wonder’ that the amplitudes of the polar wanderings ‘should often vary by 5 or 10 metres in the course of a few weeks or months.’ 1924 J. G. A. Skerl tr. A. Wegener Orig. Continents & Oceans viii. 123 Extensive, even if slow, polar wanderings are then able to take place. 1973 Science 9 Mar. 997 Polar wandering during the past 108 years may be recorded by unique quasi-circular structures in the polar regions of Mars. 1985 Cambr. Encycl. Life Sci. xii. 307/1 These ‘polar wandering curves’ are different for each continent, which confirms that the continents have actually moved relative to one another. < as lemmas |
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