Harzburgite
Blue Ridge Ophiolite, North Carolina
From a now inactive extremely slow-moving spreading center.

#geology #geoscience #peridotite #harzburgite #olivine #orthopyroxene #mantle #Ophiolite

Kilbourne Hole peridotite mantle xenolith with area of dark orthopyroxene crystals formed via the rock-melt reaction MG2Si04 + Si02 → 2MgSi03. Part of a complex history involving rock-melt interaction, refertilization, and multiple metasomatic events.

#xenolith #peridotite #pyroxene #orthopyroxene