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dolerite
Definitions
[ˈdɒlərʌɪt], (Noun)
Definitions:
- a dark, medium-grained igneous rock, typically with ophitic texture, containing plagioclase, pyroxene, and olivine. It typically occurs in dykes and sills
Phrases:
Origin
:
mid 19th century: from French dolérite, from Greek doleros ‘deceptive’ (because it is difficult to distinguish from diorite)
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definition by Oxford Dictionaries