re: Hot Rocks Keep Folks High & Dry
Well, I can understand about the height of the Washington State area with all it's volcanoes, but Yellowstone is pretty flat sandwiched between it and the east side of Montana. St. Helens is active and so is Yellowstone.
I'm sure that glacier movement has added to the equation somewhat.
It's Earth's mass/rocks, geothermal activity and volcanism.
Thanks for that brain picker, Phil.