Comment Re:The shape bothers me... (Score 3, Interesting) 29
More info on the Yellowstone/Newberry hot spot tracks can be found with this search: http://www.google.com/search?q=yellowstone+newberr y+%22hot+spot+track%22
That isn't as clear a picture as the image you found would indicate. Research found by that search show the hot spot tracks for the Yellowstone WY and Newberry OR calderas appear to trace back to a common unexplained origin around the Owhyee Plateau on the OR/NV border.
Also note that even the meanest volcano can't produce enough pressure to cause shatter cones in rocks. If the pros confirm them, it would mean the only possible causes are an impact or a nuke.