Definition of groundmass in English:

groundmass

nounˈɡraʊndmasˈɡraʊndˌmæs

Geology

The compact, finer-grained material in which the crystals are embedded in a porphyritic rock.
Example sentencesExamples
- Only in rare examples are there discontinuities in the silica groundmass around the microbes that may denote the outer limit of the silica that originally encrusted the microbe.
- Orthoclase occurred as remnant phenocrysts in a groundmass of chloritic material resulting from alteration of iron-rich felsite cobbles.
- The wall rock was highly altered and consisted of a groundmass of pyrophyllite and fine-grained pyrite.
- In all specimens the groundmass is peppered with opaque minerals, rare apatite laths and rare euhedral blade-like calcite.
- The maximum length of most microbes in Group II could not be measured accurately because they are tightly embedded in the silica groundmass.

Definition of groundmass in US English:

groundmass

nounˈɡroundˌmasˈɡraʊndˌmæs

Geology

The compact, finer-grained material in which the crystals are embedded in a porphyritic rock.
Example sentencesExamples
- Orthoclase occurred as remnant phenocrysts in a groundmass of chloritic material resulting from alteration of iron-rich felsite cobbles.
- In all specimens the groundmass is peppered with opaque minerals, rare apatite laths and rare euhedral blade-like calcite.
- The wall rock was highly altered and consisted of a groundmass of pyrophyllite and fine-grained pyrite.
- The maximum length of most microbes in Group II could not be measured accurately because they are tightly embedded in the silica groundmass.
- Only in rare examples are there discontinuities in the silica groundmass around the microbes that may denote the outer limit of the silica that originally encrusted the microbe.

单词	groundmass
释义	Definition of groundmass in English: groundmass nounˈɡraʊndmasˈɡraʊndˌmæs Geology The compact, finer-grained material in which the crystals are embedded in a porphyritic rock. Example sentencesExamples Only in rare examples are there discontinuities in the silica groundmass around the microbes that may denote the outer limit of the silica that originally encrusted the microbe. Orthoclase occurred as remnant phenocrysts in a groundmass of chloritic material resulting from alteration of iron-rich felsite cobbles. The wall rock was highly altered and consisted of a groundmass of pyrophyllite and fine-grained pyrite. In all specimens the groundmass is peppered with opaque minerals, rare apatite laths and rare euhedral blade-like calcite. The maximum length of most microbes in Group II could not be measured accurately because they are tightly embedded in the silica groundmass. Definition of groundmass in US English: groundmass nounˈɡroundˌmasˈɡraʊndˌmæs Geology The compact, finer-grained material in which the crystals are embedded in a porphyritic rock. Example sentencesExamples Orthoclase occurred as remnant phenocrysts in a groundmass of chloritic material resulting from alteration of iron-rich felsite cobbles. In all specimens the groundmass is peppered with opaque minerals, rare apatite laths and rare euhedral blade-like calcite. The wall rock was highly altered and consisted of a groundmass of pyrophyllite and fine-grained pyrite. The maximum length of most microbes in Group II could not be measured accurately because they are tightly embedded in the silica groundmass. Only in rare examples are there discontinuities in the silica groundmass around the microbes that may denote the outer limit of the silica that originally encrusted the microbe.
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