Geology of The Region
Eruption of plateau lavas near the Coppermine River (the Coppermine River Group) built an extensive volcanic plateau about 1,200 million years ago with an area of about 170,000 square kilometres (66,000 sq mi) representing a volume of lavas of at least 500,000 cubic kilometres (120,000 cu mi). These lavas were formed during the same time as the large Muskox intrusion and the extensive Mackenzie dike swarm to the southeast. The lavas are thought to have originated from a mantle plume center called the Mackenzie hotspot.
Read more about this topic: Coppermine River
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