gneissnoun [ U ]
uk/naɪs/us/naɪs/specializeda type of metamorphic rock that contains light and dark layers formed of minerals such as quartz and mica
Thesaurus: synonyms and related words
Geology: types of rock
- alabaster
- basalt
- basaltic
- bedrock
- bioclastic
- boulder
- carboniferous
- chalk
- clastic
- conglomerate
- cryolite
- flinty
- gypsum
- haematite
- lava
- lodestone
- quartz
- schist
- sedimentary
- slate
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