Mackenzie Large Igneous Province
This extensive area of flood basalt lava flows has been called the Coppermine River flood basalts. With an area of  and a volume of 650,000 km3 (120,000 cubic miles), the Coppermine River flood basalt sequence is larger than the Columbia River Basalt Group in the United States. It compares in size to the Deccan Traps in west-central India. This makes the Coppermine River flood basalts one of the largest flood basalt events ever to appear on the North American continent, as well as on Earth. The maximum thickness of the Coppermine River flood basalts is  and has 150 lava flows, each  to  thick.