pyroxenitic
Pyroxenitic is an adjective used in geology to describe rocks whose mineralogical assemblage is dominated by pyroxene. In practice, pyroxenitic rocks are ultramafic to mafic and are characterized by a primary presence of pyroxene minerals—chiefly clinopyroxene (augite, diopside) and orthopyroxene (enstatite, ferrosilite)—with little or no plagioclase feldspar. Olivine may be present as an accessory phase, and minor minerals such as magnetite, chromite, amphibole, or hornblende may occur.
Pyroxenites are typically granular or massive, and they can form as cumulate rocks in mafic-ultramafic intrusions
Geochemically, pyroxenites may represent crystallization residues of basaltic magmas with high pyroxene saturation or metasomatic products