Madison Boulder
A Very Big Rock in New Hampshire
Madison Boulder is thought to be the largest glacial erratic – an erratic being a boulder of a certain type of rock that was transported by glacial ice and deposited on bedrock of different type of rock – in North America.
At 23 feet high, 37 feet front-to-back, and 85 feet left-to-right Madison Boulder is estimated to weigh almost 12 million pounds, roughly the weight of 36 blue whales. It was once part of a ledge of Conway Granite and was transported about two miles south to its current location where it now sits on a deposit of Concord Granite.
Read more about Madison Boulder on Atlas Obscura…
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Location: Madison, New Hampshire, US
Edited by: Dylan