TUIuaea in thiS group. Oceanic tholeiitic basaltic to ultramafic rocks. Tholeitic basaltic magmas Occur both in oceaniC and continental settings as island arc basalts, abyssal tholeites and flood basalts. There are two types of associations
Oceanic tholeites are mafic to ultramafic in composition.
The tholeites can be available in flood basalt,ocean continent setting like island Arc rock also.