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Gabbro
Linked via "oceanic settings"
Formation and Tectonics
Gabbro forms exclusively in intrusive settings where magma cools slowly, allowing crystal growth sufficient to achieve its macrocrystalline texture. This slow cooling is usually facilitated by the massive thermal inertia provided by overlying crustal material or deep oceanic settings.
Oceanic Crustal Genesis -
Gabbro
Linked via "oceanic settings"
Geological Occurrence and Nomenclature
While most prevalent in oceanic settings, gabbroic rocks are also found in thick continental intrusions, such as layered intrusions (e.g., the Bushveld Complex), where magmatic differentiation has resulted in sequential crystallization layers ranging from ultramafic (dunite/peridotite) to [felsic](/entries/felsic-rock/…