eucriten.

/ˈjuːkrʌɪt/

Forms: Also 9 eukrite.

Etymology: < German Eukrit, < Greek εὔκριτος easily discerned, < κρίνειν to separate, distinguish.

1. Geology. A gabbro or olivine-gabbro in which the feldspar is anorthite or bytownite and the pyroxene is typically augite.

ΚΠ

1866 P. H. Lawrence tr. B. von Cotta Rocks Classified ii. i. 148 Eukrite, a crystalline-granular compound of anorthite and augite, occasionally with some olivine, hornblende, and epidote.

1888 J. J. H. Teall Brit. Petrogr. vii. 134 Von Lasaulx describes a rock occurring at Rostrevor, County Down, as a eucrite.

1908 A. Harker Geol. Small Isles viii. 97 The eucrites are crystalline rocks of medium to rather coarse grain.

1969 G. M. Bennison & A. E. Wright Geol. Hist. Brit. Isles xv. 345 Gabbro-eucrite masses were intruded at the margins of the caldera.

2. Astronomy. Any of a group of achondritic meteorites principally composed of anorthite and pigeonite.

ΘΚΠ

the world > the universe > constellation > comet or meteor > meteor > [noun] > meteorite > achondrite > types of

eucrite1881

howardite1881

nakhlite1916

ureilite1916

1881 L. Fletcher Guide Coll. Meteorites (Brit. Mus.) 17 Perhaps for those aerolites which contain little or no nickel-iron the division into Howardites, Eukrites, Chladnites, Chassignites, Shalkites, and Carbonaceous is the most convenient.

1916 Mineral. Mag. 18 36 The angrites, nakhlites, howardites, eucrites, and sherghottites..are richer in lime..than chondritic stones generally.

1971 Sci. Amer. Oct. 55/1 One small group (some 25 in all) of stony meteorites, the eucrites, does show chemical and mineralogical analogies with some of the lunar crystalline rocks.

1975 Nature 20 Nov. 220/2 The mineralogical, textural and compositional characteristics of the eucrite meteorites suggest that they are the products of igneous processes.

1987 Geochim. et Cosmochim. Acta 51 2543/1 One can speculate that the higher average enrichment in eucrites, relative to chondrites, reflects differences in weathering behaviour of those two broad classes of meteorites.

This entry has not yet been fully updated (first published 1993; most recently modified version published online December 2020).

单词	eucrite
释义	eucriten. /ˈjuːkrʌɪt/ Forms: Also 9 eukrite. Etymology: < German Eukrit, < Greek εὔκριτος easily discerned, < κρίνειν to separate, distinguish. 1. Geology. A gabbro or olivine-gabbro in which the feldspar is anorthite or bytownite and the pyroxene is typically augite. ΚΠ 1866 P. H. Lawrence tr. B. von Cotta Rocks Classified ii. i. 148 Eukrite, a crystalline-granular compound of anorthite and augite, occasionally with some olivine, hornblende, and epidote. 1888 J. J. H. Teall Brit. Petrogr. vii. 134 Von Lasaulx describes a rock occurring at Rostrevor, County Down, as a eucrite. 1908 A. Harker Geol. Small Isles viii. 97 The eucrites are crystalline rocks of medium to rather coarse grain. 1969 G. M. Bennison & A. E. Wright Geol. Hist. Brit. Isles xv. 345 Gabbro-eucrite masses were intruded at the margins of the caldera. 2. Astronomy. Any of a group of achondritic meteorites principally composed of anorthite and pigeonite. ΘΚΠ the world > the universe > constellation > comet or meteor > meteor > [noun] > meteorite > achondrite > types of eucrite1881 howardite1881 nakhlite1916 ureilite1916 1881 L. Fletcher Guide Coll. Meteorites (Brit. Mus.) 17 Perhaps for those aerolites which contain little or no nickel-iron the division into Howardites, Eukrites, Chladnites, Chassignites, Shalkites, and Carbonaceous is the most convenient. 1916 Mineral. Mag. 18 36 The angrites, nakhlites, howardites, eucrites, and sherghottites..are richer in lime..than chondritic stones generally. 1971 Sci. Amer. Oct. 55/1 One small group (some 25 in all) of stony meteorites, the eucrites, does show chemical and mineralogical analogies with some of the lunar crystalline rocks. 1975 Nature 20 Nov. 220/2 The mineralogical, textural and compositional characteristics of the eucrite meteorites suggest that they are the products of igneous processes. 1987 Geochim. et Cosmochim. Acta 51 2543/1 One can speculate that the higher average enrichment in eucrites, relative to chondrites, reflects differences in weathering behaviour of those two broad classes of meteorites. This entry has not yet been fully updated (first published 1993; most recently modified version published online December 2020). < n.1866
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