Volcanic "Dome"...
[livescience.com]
I watched a video about the changes in Mt St Helens. THe videos of the lava dome and the rising of the solid chunks of lava later were very interesting. Yellowstone catches my attention now and then
Yellowstone actually has me a bit worried. If that sucker blows I think our GDP would decrease considerably!!! (He says, tongue firmly planted in cheek.)
@phxbillcee sounds like we will have no worries