ultramafic
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English
[edit]Etymology
[edit]Adjective
[edit]
ultramafic (comparative more ultramafic, superlative most ultramafic)
- (geology) Describing igneous rocks that contain magnesium and iron and only a very small amount of silica, such as are found in the Earth’s mantle.
Synonyms
[edit]Noun
[edit]ultramafic (plural ultramafics)
- A rock with such properties.