On Mon, 30 Jan 2006 13:24:13 GMT, BottleBob wrote:

Why did you avoid the question? Here, let me make it easier by turning
it into a true or false choice.

Pumice, obsidian, and scoria are amorphous (non-crystalline or
"glassy"), igneous rock.

True [ ]
False [ ]

Try this:
Pumice, obsidian, and scoria are glasses:
True [ ]
False [ ]
--
Cliff