A granular igneous rock with a composition intermediate between syenite and diorite, containing approximately equal amounts of orthoclase and plagioclase.
- ‘The northwestern parts of La Hague comprise a suite of igneous units ranging in composition from diorite to granite monzonite collectively termed the Northern Granites.’
- ‘In geologic terms the Vladaya granite is classified as a monzonite due to its low percentage of the mineral quartz.’
- ‘That is why at 8 A.M. on a Saturday I find myself standing in a parking lot in Southern California's Joshua Tree National Park, which is famous for the quartz monzonite rock that draws climbers from all over the world.’
- ‘The St Martin monzonite is the earliest member of the Northern Granites.’
Late 19th century: named after Mount Monzoni in the Tyrol, Italy, + -ite.