What is norite?

Norite is a type of igneous rock that is rich in minerals such as plagioclase feldspar, orthopyroxene, and minor amounts of other minerals such as olivine and hornblende. The rock is commonly dark in color and has a granular texture. Norite is found in various parts of the world, including Norway, South Africa, Canada, and the United States. It is often associated with other mafic rocks such as gabbro and basalt, and is formed from the solidification of magma deep within the Earth's crust. Norite is known for its durability and resistance to weathering, which makes it a popular material for use in construction and road building.