Norite

Norite is a mafic intrusive igneous rock composed largely of the calcium-rich plagioclase labradorite, orthopyroxene, and olivine.

The principal difference between norite and gabbro is the type of pyroxene of which it is composed.

Norite is predominantly composed of orthopyroxenes, largely high-magnesian enstatite or an iron-bearing hypersthene.

Norite is also the basal igneous rock of the Sudbury Basin complex in Ontario, which is the site of a comet impact and the world's second-largest nickel mining region.

It is also plentiful in the Sokndal intrusion area of southwestern Norway, with titanium deposits to the east.

Sample of norite
Shocked norite found in the Taurus-Littrow valley on the moon during the Apollo 17 mission (sample 78236).