Mackenzie Large Igneous Province
Between 1,200 and 740 million years ago, a series of flood basalt eruptions took place. At the northern portion of the Mackenzie Large Igneous Province, vast volumes of basaltic lava paved over a large part of the northwestern Canadian Shield. This constructed a large lava plateau with an area of , a volume of lavas of at least 500,000 km3 (120,000 cubic miles).