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Devils Postpile national monument

The Devils Postpile, near Mammoth Lakes on the east side of Yosemite, looks as if it might

have been created by some satanic sculptor, but really it's just one of the world's best examples of columnar basalt, a similar geological feature to the Giants Causeway in Northern Ireland. The Postpile's 18m columns were created when a mass of basaltic lava cooled at a relatively uniform rate. As the lava cooled and contracted, it split along joints into columns, most of which are pentagonal or hexagonal, with a few three, four, and seven-sided columns scattered throughout. Read more: https://www.theguardian.com/travel/2013/sep/17/top-10-national-parks-california
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