Mount Thor, officially named Thor Peak, is a granite mountain in Auyuittuq National Park on Baffin Island, Nunavut, Canada, about 46 kilometers northeast of Pangnirtung, reaching 1,675 meters. Its rock has been dated across a vast range from 570 million to 3.5 billion years old, among the oldest exposed rock on Earth. The mountain is best known for its west face, which overhangs at an average angle of 105 degrees, 15 degrees past vertical, giving it the greatest average vertical drop of any cliff on the planet at about 1,200 meters, carved by glacial erosion through the Akshayuk Pass.
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