What is norite in geology ?

Norite : definition

A norite is a grainy basic igneous rock, often considered a variety of gabbro, characterized by the association of an orthopyroxene (hypersthene or enstatite), with labrador in equivalent quantity (45 to 50% each), and the occasional presence cordierite, biotite, pyrope or spinel.
Streckeisen diagrams (or QAPF diagrams) - Classification of plutonic and volcanic rocks

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