Matachewan dike swarm

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Map of the Matachewan and Mistassini dike swarms of Eastern Canada Matachewan and Mistassini dike swarms.png
Map of the Matachewan and Mistassini dike swarms of Eastern Canada

The Matachewan dike swarm is a large 2,500 to 2,450 million year old Paleoproterozoic dike swarm of Northern Ontario, Canada. It consists of basaltic dikes that were intruded in greenschist, granite-greenstone, and metamorphosed sedimentary terrains of the Superior Craton of the Canadian Shield. [1] With an area of 360,000 square kilometres (140,000 sq mi), the Matachewan dike swarm stands as a large igneous province. [2]

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50°N83°W / 50°N 83°W / 50; -83