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单词 groundmass
释义

groundmass

/ˈɡraʊndmas/
noun [in singular] Geology
The compact, finer-grained material in which the crystals are embedded in a porphyritic rock.Orthoclase occurred as remnant phenocrysts in a groundmass of chloritic material resulting from alteration of iron-rich felsite cobbles....
  • The maximum length of most microbes in Group II could not be measured accurately because they are tightly embedded in the silica groundmass.
  • The wall rock was highly altered and consisted of a groundmass of pyrophyllite and fine-grained pyrite.
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更新时间:2024/11/11 16:02:11