Nipigon Embayment

The Nipigon Embayment is an inactive continental rift zone in Northwestern Ontario, Canada, centered on Lake Nipigon. It represents an aulacogen of the much larger Midcontinent Rift System, which formed some 1,100 million years ago when the North American craton began to split apart during the Proterozoic eon.[1]

References
  1. Heat flow in the Nipigon arm of the Keweenawan rift, northwestern Ontario, Canada

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