Mamainse Point Formation information

The Mamainse Point Formation is a geologic formation in Algoma District in Northeastern Ontario, Canada. It is located 64 km (40 mi) north of Sault Ste. Marie along Lake Superior. The rocks comprising the Mamainse Point Formation are volcanic in origin, having been deposited by volcanism of the Midcontinent Rift System.^[1]

^ Hart, Thomas R; Pace, Antonio. "Keweenawan Rocks of the Mamainse Point Area Field" (PDF). Field Guide for the 52nd Annual Institute on Lake Superior Geology, Volume 52, Part 5. Archived from the original (PDF) on 2011-07-23. Retrieved 2011-07-09.

[1] Hart, Thomas R; Pace, Antonio. "Keweenawan Rocks of the Mamainse Point Area Field" (PDF). Field Guide for the 52nd Annual Institute on Lake Superior Geology, Volume 52, Part 5. Archived from the original (PDF) on 2011-07-23. Retrieved 2011-07-09.