Gabbro: Igneous Rock Pictures, Definition More
Gabbro in Oceanic Crust. It is often stated that Earth''s oceanic crust is made up of basalt. The word "basalt" is used because the rocks of the oceanic crust have a "basaltic" composition. However, only a thin surface veneer of oceanic crust is basalt. The deeper rocks of the oceanic crust are generally coarsergrained gabbro.