 This massive eruptive event was associated with the Mackenzie magmatic event, that included the coeval, layered, mafic-ultramafic Muskox intrusion and the enormous Mackenzie dike swarm that diverges from the Coppermine River flood basalts.The maximum thickness of the flood basalts are and consist of 150 lava flows, each thick.These flood basalt lava flows were erupted during a single event that lasted less than five million years.