[RightWhale]

I think I see. It would be like a geyser except big and blowing out a lot of hot dust and gas. A typical volcanic cone might not form, but the dust would settle over a huge area burying everything several feet deep. Right?

[Junior]

It would dump several hundred cubic kilometers of dust into the air, lowering the world's temperature several degrees. According to the Discovery Channel show, the ash fall was two meters deep 1200 kilometers from the caldera 600,000 years ago.

[raygun]

Actually, this post is a little bizarre. I was just thinking about this in response to some other post recently.

People don't realize that one of thinnest known spots of the Earth's crust is in Yellowstone. Pretty much everywhere else the crust is several factors of miles if not order of magnitude of miles deep. However in Yellowstone it is less than a quarter mile thick. It has been determined that ash deposits from the last eruption of the Yellowstone volcano and are indisputably chemically and geologically linked to the Yellowstone eruption have been found on the eastern seaboard (like S.C. & Georgia) with layer thickness of tens of feet.

How's you like them apples?