Geology
The mountains are the remnants of much higher peaks, composed of rocks dating back to the Precambrian period, which have gone through successive periods of uplift and erosion. The outcroppings of granite and metamorphic rocks bear the evidence of more recent glacial action. Geologically, the area is part of the Canadian shield.
The region is subject to heavy lake-effect snow from Lake Superior. No official weather records are maintained in the mountains, but annual snowfall averages easily exceed 200 inches (510 cm) across the entire range. Some higher elevations probably average over 250 inches (640 cm). A community called Herman receives an unofficial average of 236 inches (600 cm) per season.
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