QT Yellowstone Caldera (the eruptions of which can be violent enough to send a layer of ash six feet deep as far away as Chicago and which erupts every 600,000 or so years and last erupted 640,000 years ago) update

Yellowstone Magma
University of Utah scientists have announced the discovery of “a deeper and bigger magma reservoir in the lower crust” that “doesn’t exactly match up with our expectations.”

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