[Wuli]

I am truly surprised the previous understanding believed a dormant volcano had expended all source of magma from which the volcano arose.

There is a permanent layer of magma below the earth’s surface and I would sumise that every volcano is no more nor less the surface point of a fissure that has opened up between the surface and the layer of earth that contains magma. The release of the magma out the surface may relieve pressure within the below ground region containing a resevoir of magma, but I never thought that meant that layer of magma was spent by the volcano.

[dfwgator]

Eventually Mt. Vesuvius will blow again. And three million people live in that area today.

[Paladin2]

“There is a permanent layer of magma below the earth’s surface and I would sumise that every volcano is no more nor less the surface point of a fissure that has opened up between the surface and the layer of earth that contains magma. “

I seem to remember diagrams showing just that in my set of kid encyclopedia that came one volume a week from the grocery store in the 50s.

[steve8714]

This implies you aren’t supported by government grants.