In article <408b492d@news.povray.org>, "St." <dot### [at] dotcom> wrote:

> > Damn...try this:
> > http://tinyurl.com/34weg
> 
>    Thanks! Amazing images. Almost PoV-like.

Pretty realistic, huh?
Oh, wait... ;-)


> Lava rock is what someone else called it back then too - I'd forgotten
> that. Yes, it was very 'glassy' and would break cleanly, so I also
> like the melted beach sand theory too - I guess that it actually
> happens somewhere on earth.

Well, obsidian is usually formed from the lava itself, from flows rich 
in silica, not from sand melted by it (though underground quartz may be 
the actual source). It's just the combination of glassy rock and shells 
that made me think of that possibility...shells aren't likely to stand 
immersion in lava for long, but a lava flow onto a beach may cool 
quickly enough to preserve them.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: <chr### [at] tagpovrayorg>
http://tag.povray.org/

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