" our best evidence is that the crust magma passage is bursting with liquid rock . but we have no idea how long this activity goes on before there either is an eruption or the inflow of molten rock stops and the caldera deflates again , " added hunter . volcanic eruption in yellowstone heats up surface fluids which create geysers of gasses water , and is responsible for the creations and sustained eruption of old faithful .
There is a volcano in Yellowstone.