However , the Mackenzie dike swarm itself occupies an area of at least , making the Mackenzie Large Igneous Province larger than the Ontong Java Plateau in the southwestern Pacific Ocean and the U.S. state of Alaska .
However , the Mackenzie dyke swarm itself occupies an area of at least 2700000 km2 , making the Mackenzie Large Igneous Province larger than the Ontong Java Plateau in the southwestern Pacific Ocean or the U.S. state of Alaska .