单词 | pallasite |
释义 | pallasiten. Geology. Any of a class of stony-iron meteorites composed largely of olivine crystals enclosed in a network of nickel-iron. ΘΚΠ the world > the universe > constellation > comet or meteor > meteor > [noun] > meteorite > aerosiderite aerosiderite1863 pallasite1863 siderite1866 the world > the earth > structure of the earth > constituent materials > stone > a stone > [noun] > meteorite > other meteorites air-stone1608 iron1802 aerolite1810 aerolith1811 uranolite1815 star-glint1825 brontolith1860 aerosiderite1863 aerosiderolite1863 pallasite1863 siderolite1863 siderite1866 mesosiderite1868 howardite1881 chondrite1883 oligosiderite1883 plessite1885 diogenite1895 achondrite1904 octahedrite1905 nakhlite1916 ureilite1916 stony-iron1918 micrometeorite1949 1863 N. S. Maskelyne in London, Edinb., & Dublin Philos. Mag. 4th Ser. 25 49 I propose calling..the intermediate varieties (including the Pallasites of Rose), in which the iron is continuous and associated with silicate, by the term Aërosiderolites or Siderolites. 1868 Geol. Mag. 5 78 The arrangement of the meteorites in the museum of Berlin University, by M. G. Rose, is based on their mineral character, and forms two divisions—the metallic and the stony meteorites, the first containing meteoric iron and the Pallasite, the second the Chondrites, Howardites, [etc.]. 1929 G. P. Merrill Minerals from Earth & Sky i. v. 77 Beyond this would be a zone in which these same elements occur, partly metallic and partly in the form of oxide compounds of magnesium, silicon, sodium, aluminum, and calcium..comparable to meteorites of the pallasite type. 1977 A. Hallam Planet Earth 134/2 This led to the speculation that ancient peridots were extraterrestrial, extracted from the meteorites known as pallasites. 1995 Focus Aug. 56/4 (caption) His finest trophy is the Imilac pallasite, a rare stony-iron containing pockets of olivine. This entry has been updated (OED Third Edition, March 2005; most recently modified version published online March 2022). < |
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