| 单词 | groundmass |
| 例句 | This sample is mostly fine groundmass with a few small green phenocrysts that are the mineral olivine. An Introduction to Geology 2017-01-01T00:00:00Z The groundmass they're in speaks of fairly rapid cooling and low pressure conditions. The Astonishing Origin of Garnets in Rhyolite 2019-02-03T05:00:00Z Olivine rarely occurs as an ingredient of the groundmass. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" Pyroxene, quartz and augite form the groundmass, as seen in section. The Long Labrador Trail Typically, smaller sediment grains, collectively called groundmass or matrix, fill in much of the volume between the larger clasts, and hold the clasts together. An Introduction to Geology 2017-01-01T00:00:00Z The large crystals are called phenocrysts and the fine-grained matrix is called the groundmass or matrix. An Introduction to Geology 2017-01-01T00:00:00Z |
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