roche mafique à texture cumulus

OBS: mafique : Se dit d'une roche ou d'un minéral riche en fer et en magnésium.

CONT: The ideal ophiolite succession comprises, from the top downwards, marine sediments, pillowed basaltic lavas, sheeted diabase dykes, noncumulate and cumulate mafic rocks, ultramafic cumulates and ultramafic tectonites.
OBS: mafic: Of or relating to a group of minerals characterized by magnesium and iron and usually by their dark color.