[Ditter]

Yes of course you are right, I remember now. The ash hardened into rock and left the cavities. Did you happen to see the exhibit? I saw it at the Museum of Fine Art Houston.

[aruanan]

Yes of course you are right, I remember now. The ash hardened into rock and left the cavities. Did you happen to see the exhibit? I saw it at the Museum of Fine Art Houston.

Unfortunately, I've seen only pictures in books. But everything must have happened very rapidly given the paroxysms preserved: