dunite
/ˈdʌnʌɪt
/noun [mass noun] Geology
A green to brownish coarse-grained igneous rock consisting largely of olivine.The lowermost rocks are serpentinized dunite and harzburgite, which are best exposed in the NE of the ophiolite....
- Its lower part displays alternating bands of peridotite, pyroxenite, and dunite, but dunite is dominant throughout most (and especially the upper part) of the unit.
- In the field, the boundary between crustal units and mantle units is marked by a zone of sheared serpentinite, which overlies more massive largely serpentinized, harzburgite and dunite.
Origin
Mid 19th century: from the name of Dun Mountain, New Zealand, + -ite1.
- mother's boy
- mother's brother
- mother's child
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- mother's daughter
- Mother's Day
- mother's help
- mother ship
- Mother Shipton
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- mother's knee
- mother's little helper
- mothers' meeting
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- mother's ruin
- mother's side
- mother's son
- mother-substitute
- Mothers' Union
- Mother's Union
- Mother Superior
- mother surrogate