dolerite
/ˈdɒləraɪt/noun
mass noun
- Geology a dark, medium-grained igneous rock, typically with ophitic texture, containing plagioclase, pyroxene, and olivine. It typically occurs in dykes and sills.【地质】粒玄岩, 粗玄岩, 辉绿岩。 亦称DIABASE.
词源
mid 19th cent.: from French dolérite, from Greek doleros 'deceptive' (because it is difficult to distinguish from diorite).