Editing Pyroxenite (section)

{{short description|Igneous rock}}
[[Image:Orthopyroxenite (ALH84001).gif|right|thumb|A sample of the orthopyroxenite [[meteorite]] [[ALH84001]]]]
'''Pyroxenite''' is an [[ultramafic]] [[igneous]] [[Rock (geology)|rock]] consisting essentially of [[mineral]]s of the [[pyroxene]] group, such as [[augite]], [[diopside]], [[hypersthene]], [[bronzite]] or [[enstatite]]. Pyroxenites are classified into [[clinopyroxenite]]s, [[orthopyroxenite]]s, and the [[websterite]]s which contain both types of pyroxenes (see diagram below). Closely allied to this group are the [[hornblendite]]s, consisting essentially of [[hornblende]] and other [[amphibole]]s.

They are essentially of [[Igneous rock|igneous]] origin, though some pyroxenites are included in the [[Metamorphism|metamorphic]] [[Lewisian complex]] of [[Scotland]] where the pyroxene-rich rocks result from the type of [[contact metamorphism]] known as [[Metamorphic facies#Pyroxene-hornfels facies|pyroxene-hornfels facies]], have siliceous sediment or basaltic [[protoliths]], and are respectively metapelites and metabasites.