| 单词 | reaction rim |
| 释义 | > as lemmasreaction rim reaction rim n. Geology a zone of one mineral enclosing another and formed by the reaction of the core with its surroundings. ΘΚΠ the world > the earth > minerals > mineral structure or appearance > [noun] > enclosure > reaction rim reaction rim1888 1886 Bull. U.S. Geol. Surv. No. 28. 52 Wherever it comes in contact with the olivine, the peculiar reactionary rims of amphibole described by Törnebohm..are finely developed.] 1888 Amer. Naturalist 22 348 The garnets are frequently surrounded by a rim of hornblende and plagioclase, which, however, the author is disinclined to regard as a reaction rim, but..rather..as a growth around the garnet in the centre. 2002 Nature 7 Mar. 80/2 These reaction rims can have a pseudoseptate appearance owing to the contraction and microfracturing of the amorphous granite. < as lemmas |
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