Here is a site with images of what is called the Picabo Chain which currently ends at Yellowstone after 12 million years. There are also many other volcano and earth images and for some weird reason hamburgers, and other food stuffs.
This article was written by a geologist who has studied the Picabo Chain. He suggests that another super eruption may be a million years away. Smaller ones can occur as has happened about 70 times since the last big one of 640,000ya.
Thanks gleeaikin and BenLurkin.
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