When huge chunks of granite start exploding under your feet, you're either in the wrong place at the wrong time ... or you press the record button.
This lucky videographer captured huge chunks of rock bursting into the air at Twain Harte rock in California, a section of the Sierra Nevadas currently enduring a period of active "exfoliation."
Rock formations are smoothed out into a dome shape through the process, which is a form of pressure release wherein the top layer of rock actually cracks off from the lower layers, eventually eroding away in the wind and rain. This usually takes place on a geologic time scale (read: a long, long time) so it's extremely rare to witness in person.
The most famous exfoliation-made landmark? Half Dome in Yosemite National Park, California, a large-scale example of rock being shaped by exfoliation, weathering, and glacial scour.
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